Статті в журналах з теми "Modified bituminous binders"
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1
Lakshman Singh, Khwairakpam, and Debjani Panda. "Study on Strength Characteristics Improvement of Polyethylene Modified Bituminous Concrete Mixes." Key Engineering Materials 803 (May 2019): 216–21. http://dx.doi.org/10.4028/www.scientific.net/kem.803.216.
Повний текст джерелаАнотація:
The present study shows an investigation on improvement of bituminous binder and its mixes using modified binders with different percentage (1% to 7%) of domestic waste polyethylene (PE).The temperature susceptibility and penetration index (PI) of the modified binders were calculated. It is observed that PI value of modified binder is found higher than unmodified binder. The strength characteristics in terms of Marshall Stability and moisture susceptibility expressed in terms of indirect tensile strength ratio (ITSR) of bituminous concrete were determined in the present study. Marshall stability of the bituminous mixture containing 3% PE increased by 34.2% as compare to mixture containing unmodified binder. The addition of 3% PE to neat bitumen, results in an increase of 20% in indirect tensile strength ratio. Using PE modified binder in bituminous concrete mixes increases stability, indirect tensile strength which turn in provide better resistance against permanent deformation.
2
Andreev, A. A., P. M. Tyukilina, V. A. Tyshchenko, N. M. Maximov, V. A. Pilshchikov, and D. V. Leshchenko. "Synergetic effect in modification of oxidized road bitumens of different group composition." World of petroleum products 03 (2022): 12–19. http://dx.doi.org/10.32758/2782-3040-2022-0-3-12-19.
Повний текст джерелаАнотація:
The physico-chemical-rheological properties of the asphalt binder are critical to the long-term performance of the asphalt pavement infrastructure. The objectives of this investigation are to characterize the physico-rheological properties of unmodified pure and polymer-modified bituminous binders using rheological performance tests. The rheological properties of three pure oxidized bitumen, three SBS with sulfur-modified bituminous binders, and three bituminous binders modified with SBS+S+PPA were studied in this work. Various amounts of styrene-butadiene-styrene (SBS), sulfur (S) and polyphosphoric acid (PPA) modifiers were added to the pure binder for this purpose. The tested physical properties of the bituminous binder include traditional penetration and softening temperature. Group composition studies (saturates, aromatics, tars and asphaltenes; SARA) were respectively conducted to quantify the chemical composition and structural properties of pure oxidized bitumen. A dynamic shear rheometer (DSR) was used to evaluate the durability (PG) of virgin, thin film oxidized (RTFO-aged) and pressure vessel (PAV-aged) bitumens. The resistance to rutting and fatigue failure was evaluated using the test for creep recovery after repeated loading (MSCR). A bending beam rheometer (BBR) was used to study the low temperature properties of bituminous binders. All modifiers have been found to improve the high temperature properties of clean asphalt. In addition, these modifiers have not been found to have a significant effect on the low temperature continuous grade of the binders.
3
Wang, Cai, Zhang, Xu, and Yu. "Laboratory Investigation of Lignocellulosic Biomass as Performance Improver for Bituminous Materials." Polymers 11, no. 8 (July 29, 2019): 1253. http://dx.doi.org/10.3390/polym11081253.
Повний текст джерелаАнотація:
Lignocellulosic biomass has gained increasing attention as a performance modifier for bituminous material due to the vast amount available, its low cost and its potential to improve the durability of pavement. However, a comprehensive study concerning both the binder and mixture performance of modified bituminous material with lignocellulose is still limited. This research aims to evaluate the feasibility of applying lignocellulose as bitumen modifier by rheological, chemical and mechanical tests. To this end, two lignocellulosic biomass modified bituminous binders and corresponding mixtures were prepared and tested. The chemical characterization revealed the interaction between lignocellulosic biomass and bitumen fractions. Rheological test results have shown that lignocellulosic modifiers improve the overall performance of bituminous binder at high, intermediate and low temperatures. The findings obtained by mixture mechanical tests were identical to the binder test results, proving the positive effect of lignocellulosic biomass on overall paving performance of bituminous materials. Although lignocellulosic modifier slightly deteriorates the bitumen workability, the modified bitumen still meets the viscosity requirements mentioned in Superpave specification. This paper suggests that lignocellulosic biomass is a promising modifier for bituminous materials with both engineering and economic merits. Future study will focus on field validation and life cycle assessment of bituminous pavement with lignocellulosic biomass.
4
Radziszewski, Piotr, and Karol J. Kowalski. "QUALITY ASSESSMENT OF BITUMINOUS BINDERS BASED ON THE VISCOELASTIC PROPERTIES: POLISH EXPERIENCE." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 20, no. 1 (March 10, 2014): 111–20. http://dx.doi.org/10.3846/13923730.2013.843586.
Повний текст джерелаАнотація:
Construction of modern and durable bituminous pavements requires high quality bituminous binder, aggregates and additives. The main objective of this paper was to analyse and compare viscoelastic properties of unmodified and polymer modified bitumens produced in Poland, Europe, in order to assess their quality. In this paper there are presented results of bituminous binder European classification tests (penetration, softening point and Fraass breaking point) as well as rheological test results conducted over a wide range of temperatures. In addition, image analysis of the microstructure of selected polymer modified bitumens is also presented. Based on the analysis it was concluded that although bituminous binders complies with European specification requirements, they are significantly different in terms of their rheological properties. It was found that regardless of binder producer, bituminous binder within the same hardness group exhibit different low and high temperature properties.
5
Ayyar, Pugazhenthi, Sundaram Lakshmi, and Ajithkumar Padmarekha. "Effect of Rest Period and Temperature on the Estimation of Fatigue Life of Bituminous Mixture." Baltic Journal of Road and Bridge Engineering 17, no. 2 (June 27, 2022): 25–46. http://dx.doi.org/10.7250/bjrbe.2022-17.559.
Повний текст джерелаАнотація:
This paper reports the experimental investigation conducted to study the influence of temperature and rest period on different methods of estimation of fatigue life of the bituminous mixture. Four-point beam bending tests were conducted on the bituminous mixture prepared with one unmodified binder and two different modified binders (crumb rubber modified and elastomer modified binder). The test was conducted at 20 °C and 0 °C using continuous loading and a rest period between two load cycles. The fatigue life was estimated using stiffness modulus and energy dissipation. The performance of three different bituminous mixtures was ranked—ranking a bituminous mixture based on the fatigue performance varied with temperature and loading condition. In addition, the ranking also varied with different post-processing methods adopted.
6
Vysotskaya, Marina, Anastasia Kurlykina, Artem Shiryaev, Anna Tkacheva, and Dmitry Litovchenko. "Modification of bituminous binders for guss asphalt." E3S Web of Conferences 274 (2021): 02011. http://dx.doi.org/10.1051/e3sconf/202127402011.
Повний текст джерелаАнотація:
Over the past few years, the research of the use of cast asphalt concrete mixtures in the upper layers of the coating of bridge structures has been actively carried out. The experience gained allows us to conclude that one of the most common effective ways to improve the durability and thermal stability of cast asphalt concrete pavements is the use of modified bituminous binders. The modified bitumen part of cast asphalt concrete acts as a medium capable of initiating the «self-healing» of the composite, independently eliminating structural defects. This study aims to research the rheological characteristics of modified bituminous binders. Bitumen grade BND 50/70 was used as a raw material in the study; the following types of additives were used as its modifiers: rubber modifier (RM), EVATHERM and SBS. The optimal concentrations of the proposed additives for modification allowing to achieve the effect of structuring the mastic component of cast asphalt concrete with insignificant increases in the temperatures of mixing and compaction of mixtures based on them have been revealed.
7
Cui, Pei Qiang, Hong Hua Zhang, and Shao Peng Wu. "Influence of High-Temperature Volatilization on Performance of Bituminous Binder." Key Engineering Materials 599 (February 2014): 164–67. http://dx.doi.org/10.4028/www.scientific.net/kem.599.164.
Повний текст джерелаАнотація:
Two bituminous binders were used in this research to investigate the influence of high-temperature volatilization on the binder performance. The results indicated that at higher temperature, the weight of bituminous binder reduced and the reducing rate was decreasing with heating time. After certain volatilization period, the softening points of bituminous binder increased while the penetration reduced significantly. The volatilization condition of oxygen and vacuum did not have significant differences on the asphaltene and colloid. The bitumen binder modified with 3% of Layered double hydroxides (LDHs) would reduce the amount of VOC fumes.
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P, Praveen Kumar, and Dr Kiran Kumar B V. "Performance Evaluation of Flexible Pavements with Modified Bitumen Binders." International Journal for Research in Applied Science and Engineering Technology 10, no. 4 (April 30, 2022): 1496–501. http://dx.doi.org/10.22214/ijraset.2022.41537.
Повний текст джерелаАнотація:
Abstract: In India majority of roads are being constructed by flexible pavements. But the performance of the pavement largely depends on quality and type of materials used, Construction methodology adopted, temperature, climatic conditions etc. Because of these variations in the mentioned parameters, pavements undergo distress/ failure. The different types of failure in flexible pavement are Rutting, Shovelling, Edge breaks, Cracks, Slippage etc. Rutting is a common phenomenon which occurs in flexible pavement surface due to overloading of vehicles and repeated application of wheel load. Rutting is defined as channelized depression in the pavement surface along wheel path due to heavy repetitive traffic load. Design of bituminous paving mixes greatly effects the performance of pavements. In the present laboratory research work, conventional bitumen is used in wearing/ surface course and Modified Bitumen is used in binder course of the layer. Pavement layers are constructed/casted in an Indigenously designed, developed and fabricated equipment called Roller Compactor cum Rut Analyzer (RCRA) and Rutting test was performed. The overall objective is to compare the Marshall properties of the conventional and Modified Bituminous mix and to study the rutting performance of these bituminous mixes. Results shows that bituminous mixes prepared with Modified Bitumen/Binders has a very high Marshall Strength and offers greater resistance to rutting Keywords: Modified Bitumen, Bituminous Concrete (BC), Dense Bituminous Macadam (DBM), Marshall Stability, Roller Compactor cum Rut Analyzer (RCRA), Crumb Rubber Modified Bitumen (CRMB)
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P, Praveen Kumar, and Dr Kiran Kumar B V. "Performance Evaluation of Bituminous Mixes with Modified Binders using Roller Compactor cum Rut Analyzer (RCRA)." International Journal for Research in Applied Science and Engineering Technology 10, no. 4 (April 30, 2022): 1502–7. http://dx.doi.org/10.22214/ijraset.2022.41551.
Повний текст джерелаАнотація:
Abstract: In India majority of roads are being constructed by flexible pavements. But the performance of the pavement largely depends on quality and type of materials used, construction methodology adopted, temperature, climatic conditions etc. Because of these variations in these parameters, pavements undergo distress/ failure. The different types of failure in flexible pavement are Rutting, Shovelling, Edge breaks, Cracks, Slippage etc. Rutting is a common phenomenon which occurs in flexible pavement surface due to overloading of vehicles and repeated application of wheel load. Rutting is defined as channelized depression in the pavement surface along wheel path due to heavy repetitive traffic load. Design of bituminous paving mixes greatly effects the performance of pavements. In the present laboratory research work, conventional bitumen is used in wearing/ surface course and Modified Bitumen is used in binder course of the layer. Pavement layers are constructed/casted in an Indigenously designed, developed and fabricated equipment called Roller Compactor cum Rut Analyzer (RCRA) and Rutting test is performed. The Rutting test is carried out on wearing course of bituminous layer (BC Gr-II with VG-30) and by adopting Binder course layer namely DBM Gr-II prepared with two different types of binders namely VG-30, SBS-70. The overall objective is to compare the Marshall properties of the conventional and Modified Bituminous mix and to study the rutting performance of these bituminous mixes.. Results shows that bituminous mixes prepared with Modified Bitumen/Binders (SBS-70) has a very high Marshall Strength and offers greater resistance to rutting. Keywords: Modified Bitumen, Bituminous Concrete (BC), Dense Bituminous Macadam (DBM) , Marshall Stability, Roller Compactor cum Rut Analyzer (RCRA), Styrene-Butadiene-Styrene (SBS).
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Moumita, Naskar, Tapan Kumar Chaki, and K. Reddy Sudhakar. "Effect of Recycled EVA as Modifier on the Various Properties of Bituminous Binder for Road Application." Advanced Materials Research 214 (February 2011): 339–43. http://dx.doi.org/10.4028/www.scientific.net/amr.214.339.
Повний текст джерелаАнотація:
Recycled ethylene vinyl acetate (REVA) modified bituminous binders can be used in pavement construction for improved durability and enhanced performance in resisting permanent deformation of bituminous layers. This paper reports the thermogravimetric studies conducted on REVA modified bitumen (REMB) binders. The activation energies were determined from thermogravimetric analysis (TGA) data using Kissinger method, which does not require knowledge of the reaction mechanism. The effect of different percentages of REVA addition, as modifier in neat bitumen on the rheological properties, surface energy and microstructure of the bitumen/ REVA blends has been investigated in this study, which ensured the successful modification of bitumen with REVA.
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Aitkaliyeva, G. S., M. A. Yelubay, A. B. Ismailova, D. S. Yerzhanova, and S. R. Massakbayeva. "POLYMERIC MODIFIERS FOR BITUMINOUS BINDERS." Bulletin of Kazakh Leading Academy of Architecture and Construction 83, no. 1 (January 15, 2022): 98–106. http://dx.doi.org/10.51488/1680-080x/2022.1-02.
Повний текст джерелаАнотація:
Polymer-modified binders (PMB) have found wide application in improving the durability and performance properties of asphalt pavement. To establish the prospects for modifying bituminous binders with polymers, it is necessary to study the basic physical and chemical characteristics of these materials. This paper presents the results of studying the main structural and thermophysical properties of polyethylene terephthalic waste. It was revealed that the presence of functional groups and the corresponding thermal characteristics of the polymer waste open the possibility of using them as modifiers in road construction.
12
Galkin, Andrey, Serhii Oksak, and Yan Pyrig. "COMPARISON OF PROPERTIES OF BITUMINOUS BINDERS AFTER AGING BY DIFFERENT METHODS." Dorogi i mosti 2022, no. 26 (October 3, 2022): 92–107. http://dx.doi.org/10.36100/dorogimosti2022.26.092.
Повний текст джерелаАнотація:
Introduction. The performance and durability of asphalt pavements are majorly conditioned by the quality of the bituminous binders. One of the main disadvantages of asphalt pavements is the permanent change in their properties in time due to the aging of the binder. Various laboratory methods of aging are used to predict the intensity of changes in the properties of bituminous binders that occur during the asphalt mixing at plants and the lifetime of asphalt concrete in the pavement. Problem Statement. In Ukraine, with the implementation of European principles of standardization and the transition to harmonized European standards, there is a gradual replacement of the aging method ГОСТ 18180, which has long been used in the domestic road industry, with the world-accepted RTFOT aging method. Due to the different conditions set in these methods of aging, the question of the impact of differences in aging regimes on the properties of bituminous binders, the possibility of comparing the results obtained by these two methods and the interchangeability of methods is topical. Purpose. The aim of the work is to obtain the influence of the methods of aging adopted in the road industry of Ukraine on the change of properties of road viscous bitumens and bituminous binders, modified with various additives. Materials and methods. Viscous bitumens and bituminous binders modified with various additives (adhesive additives, polymers, structuring additives) used in the domestic road industry are used as objects of research. For methods of aging the domestic method ГОСТ 18180 (for a long time this method was the only one in Ukraine used for estimation of change of properties of bituminous binders under the influence of technological temperatures and which, under test conditions, is close to the standardized method TFOT), as well as the world’s widespread RTFOT method of aging are used. Results. Based on the obtained experimental data, it is found that aging by the ГОСТ 18180 method has a slightly greater effect on the change of properties than after aging by the RTFOT method. The least sensitive indicator of aging conditions is the breaking point temperature — the difference between the values of this indicator after aging by different methods is within the convergence of the method. The conditions of the aging method have the greatest effect on the quality of bitumens modified with adhesives. The relatively short heating time of binders in accordance with the conditions of the RTFOT aging method leads to less change in the adhesion of binders to the glass surface, which may contribute to misleading in thermal stability of adhesives. Conclusions. When revising the domestic standards for technical conditions for bituminous binders, which provide for the replacement of the aging method according to GOST 18180 by the RTFOT method and setting of limits for changing the standard quality of binders after aging, should take into account the slightly lower aging intensity of RTFOT binders. This is especially true for the adhesion requirements of bitumens modified with adhesives.
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Hall, Finn, and Greg White. "The Effect of Waste Plastics on the Ageing Phenomenon of Bituminous Binders and Asphalt Mixtures." Materials 14, no. 20 (October 18, 2021): 6176. http://dx.doi.org/10.3390/ma14206176.
Повний текст джерелаАнотація:
The push for environmental sustainability in the civil engineering industry has resulted in an increased interest in the use of recycled construction materials, with one example being the use of waste plastic for the modification of bituminous binder in asphalt mixtures. Existing research has associated waste plastics with various binder and asphalt mixture performance enhancing properties. However, there is a lack of research on the age-related durability of waste plastic-modified roads. This research compared the effect of commercially available waste plastic binder modifiers on the ageing phenomenon of bituminous binders and asphalt mixtures, to the effect of conventional polymers SBS and EVA, through artificial bituminous binder and asphalt mixture ageing performed in a laboratory. The addition of polymers (both waste and virgin) resulted in an increase in binder stiffness after short-term ageing as the polymer content increased. The effect of the waste plastic on ageing was comparable to the effects associated with the conventional polymers, and it was concluded that the waste plastic binder modified products should be considered sustainable alternatives to standard polymers for bituminous binder and asphalt mixture modification.
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Sybilski, Dariusz. "Zero-Shear Viscosity of Bituminous Binder and Its Relation to Bituminous Mixture's Rutting Resistance." Transportation Research Record: Journal of the Transportation Research Board 1535, no. 1 (January 1996): 15–21. http://dx.doi.org/10.1177/0361198196153500103.
Повний текст джерелаАнотація:
When testing viscosity of polymer-bitumen systems a question arises about interpretation of results as those systems behave as non-Newtonian liquids. A simple equation modeling non-Newtonian behavior of polymer-bitumens was proposed (which is a simplified version of the CROSS model). The equation used enables the calculation of zero-shear viscosity η0 from viscosity measurements conducted under various shear conditions, that is, with rotational viscometer at different shear rates (stresses). Test results are presented of several polymer-modified bituminous binders before and after Thin film oven test aging and discussion of non-Newtonian behavior. The wheel tracking test (Laboratoric Central des Ponts et Chaussées) was conducted for asphalt concrete with several bituminous binders, either plain bitumens or polymer modified. To estimate bituminous mixture's rutting resistance, a new relationship has been proposed to calculate N10 (wheel passes number to rut depth 10 mm). Close correlation was found between N10 and zero-shear (or absolute) viscosity of binders at 60°C, both conventional and polymer modified.
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Zhurinov M.Zh.,, Teltayev B.B.,, Rossi C.O.,, Amirbayev Ye.D.,, and Elshibayev A.O.,. "STANDARD INDICATORS OF MODIFIED BITUMENS." NEWS of National Academy of Sciences of the Republic of Kazakhstan 5, no. 443 (October 15, 2020): 188–95. http://dx.doi.org/10.32014/2020.2518-170x.120.
Повний текст джерелаАнотація:
The main standard indicators (penetration at 25 °С, ductility at 25 °С, softening point, Fraas point) have been determined and analyzed in this work for bitumens of the grades BND 100-130, BND 130-200 and 21 modified bitumens. The neat bitumens of the grades BND 100-130 and BND 130-200 have been produced at Pavlodar petrochemical plant from the oil of Western Siberia (Russia) by method of direct oxidation and they satisfy the requirements of the standard of Kazakhstan ST RK 1373-2013 “Bitumens and bituminous binders. Oil road viscous bitumens. Technical specifications”. The polymers Elvaloy 4170, Elvaloy AM, Kraton, Calprene 501, Butonal NS 198, SBS (L30-01A), KUMHO, crumb rubber and polyphosphoric acid have been accepted as modifiers. The modification of the bitumens has been performed in the laboratory of Kazakhstan Highway Research Institute (KazdorNII). The manufactured modified bitumens satisfy the requirements of the standard of Kazakhstan ST RK 2534-2014 “Bitumens and bituminous binders. Oil modified road bitumens. Technical specifications”. The standard indicators of the neat and modified bitumens have been determined in the laboratory of KazdorNII according to the following standards of Kazakhstan; penetration at 25 °C - ST RK 1226-2003 “Oil bitumens and binder materials based on bitumen. Method for determination of needle penetration depth”; ductility at 25 °С - ST RK 1374-2005 “Bitumens and bituminous binders. Method for determination of ductility”; softening point - ST RK 1227-2003 ‘Bitumens and bituminous binders. Determination of softening point by ring and ball method”; Fraas point - ST RK 1229-2003 ‘Oil bitumens and bituminous binders. Method for determination of Fraas point”. It is found out that all the applied polymers and polyphosphoric acid when adding them to the bitumens decrease the penetration thereby changing the grade of the bitumens. After modification 43 % of the polymer bitumens convert to the next grade, 43 % change their grade for 2 units and 14 % have the grade more viscous for 3 units. All the considered polymers and polyphosphoric acid increase the softening point thereby improving the high temperature resistance of the bitumens. It is determined that at modification of the bitumens of the grades BND 100-130 and BND 130-200 the increase of the Fraas point is 32-45 % and 28-93 % respectively. Most (71 %) of the polymers and polyphosphoric acid increase the Fraas point (decrease the low temperature resistance). In four cases out of twenty-one (19 %) the modification does not practically vary the Fraas point. The positive effect has been obtained only in two cases (10 %) for the modification of the bitumen of the grade BND 130-200 - the decrease of the Fraas point. The increase of the ductility for the bitumens has been recorded only in three cases (14 %) for their modification. In four cases (19 %) the initial ductility remains constant. In other cases (67 %) the ductility of the bitumens is decreased from 26 % to 86 %.
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Cappello, Miriam, Sara Filippi, Yvong Hung, Massimo Losa, and Giovanni Polacco. "Apparent Molecular Weight Distributions for Investigating Aging in Polymer-Modified Bitumen." Advances in Polymer Technology 2021 (November 26, 2021): 1–14. http://dx.doi.org/10.1155/2021/3660646.
Повний текст джерелаАнотація:
The oxidative aging of bituminous binders affects the performance and durability of pavements. In the case of polymer-modified binders, aging involves both bitumen and polymers and has a strong impact on the whole architecture of the material. Rheology may help in understanding these structural changes, and interesting information may be obtained by analysing the evolution of apparent molecular weight distributions. This was demonstrated with a bituminous binder modified with a poly(styrene-butadiene) block copolymer and subjected to prolonged artificial aging. Isothermal frequency sweep tests were used to construct master curves of the phase angle and magnitude of the complex modulus. The master curves were then used to calculate relaxation spectra and apparent molecular weight distributions of the binders, as well as simulated temperature sweep tests. A comparison of the behaviour of the base and modified bitumen highlighted the role of the polymer in aging. Polymer degradation significantly damages the elastomeric network, yet the residual polymer chains still interact with the bitumen molecules and reduce their oxidative aging. The apparent molecular weight distributions were deconvoluted to create an aging index specifically developed for polymer-modified bitumen.
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Kusbergenova, Zhanar, and Aizhan Zhankina. "Practical experience with modified bitumen and bituminous binders." Technobius 2, no. 1 (March 17, 2022): 0013. http://dx.doi.org/10.54355/tbus/2.1.2022.0013.
Повний текст джерелаАнотація:
To date, the issue of polymer waste recycling becomes relevant, because every year the amount of plastic and polyethylene waste increases, which leads to devastating effects on flora and fauna everywhere. One of the ways to solve this problem of polymer waste recycling is to use them to modify asphalt-concrete mixture and bitumen. Thus, two problems are solved at once: reuse of plastic, polyethylene, and other polymer wastes and improvement of asphalt concrete pavement with an increase in its service life. The paper presents a discussion of the use of modified bitumen in the construction of highways and roads, the design and technological solutions, features of the technology of modified bitumen, as well as the results of laboratory tests of modified bitumen, based on which was decided on the advisability of using. The use of the combined approach of the road pavement allows increasing the service life of the road.
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Ibrahim, Ali Huddin, Mohd Rosli Mohd Hasan, Ashiru Sani, Sharvin Poovaneshvaran, Tracy Leh Xin Wong, Megat Azmi Megat Johari, Kok Keong Choong, and Ramadhansyah Putra Jaya. "Physicomechanical Assessments and Heavy Metals’ Leaching Potential of Modified Asphalt Binders Incorporating Crumb Rubber and Tin Slag Powders." Advances in Materials Science and Engineering 2021 (September 27, 2021): 1–10. http://dx.doi.org/10.1155/2021/2137957.
Повний текст джерелаАнотація:
Industrial solid waste has been widely used as an alternative additive for bituminous material modification. This study aims to evaluate the basic properties and quantify the leaching potential of modified asphalt binders incorporating crumb rubber powder (CRP) from waste tires and tin slag (TS) for a local smelting company. Three percentages of CRP and TS, at 5, 10, and 15%, were considered. The conventional asphalt binder (PEN 60/70), CRP, and TS-based modified asphalt binders were analyzed for toxicity, softening point, penetration value, elastic recovery, torsional recovery (TR), and coatability index. The findings indicated that the addition of the waste materials led to no significant heavy metal content in the asphalt binder mix. Moreover, the basic and physical properties of the asphalt binders were also improved by 5, 10, and 15% of the waste, respectively. However, TS waste exhibited limited effects on all the parameters and had a 5% optimum dosage. The modified binders’ results showed that the CRP modified asphalt binders had fewer heavy metals and responded more to elastic recovery and coatability.
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Albornoz, Francisco Javier Sierra-Carrillo del, Fernando Moreno-Navarro, Miguel Sol-Sánchez, María del Carmen Rubio-Gámez, and Leticia Saiz. "Ageing of Crumb Rubber Modified Bituminous Binders under Real Service Conditions." Sustainability 14, no. 18 (September 7, 2022): 11189. http://dx.doi.org/10.3390/su141811189.
Повний текст джерелаАнотація:
Due to their environmental advantages, crumb rubber modified asphalt binders constitute an interesting alternative to conventional binders for road surfaces of a more durable and sustainable nature. However, in practice, they remain less commonly used than conventional polymer modified binders. This research aims to study the real ageing of crumb rubber modified asphalt binders during their service lives when exposed to various factors, including temperature gradients, the presence of water and oxidation. To this end, research was conducted on a selection of highways built with these binders and located in regions with severe climatic and traffic conditions. The binders from cores of highway surface layers were recovered and tested using the DSR (Dynamic Shear Rheometer) to determine the evolution of the rheological parameters. Crumb rubber modified asphalt binders were studied in comparison with traditional polymer modified bitumen. The analysis of the complex modulus and phase angle was conducted based on frequency and temperature sweep tests, while the evolution of the elastic recovery, Jnr, L-Index and T-Index were assessed from the multiple stress creep and recovery test. The results obtained indicate that crumb rubber modified binders show similar ageing and rheological parameters to those of conventional polymer modified bitumen, even under severe traffic and climate conditions. Furthermore, it was observed that, at high temperatures, the effect caused by real service life ageing was different to that obtained in the laboratory through the RTFO and PAV tests.
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Wang, Haopeng, Xueyan Liu, Panos Apostolidis, and Tom Scarpas. "Non-Newtonian Behaviors of Crumb Rubber-Modified Bituminous Binders." Applied Sciences 8, no. 10 (September 29, 2018): 1760. http://dx.doi.org/10.3390/app8101760.
Повний текст джерелаАнотація:
Crumb rubber-modified bitumen (CRMB) has been utilized in the asphalt paving industry for decades due to its various benefits. The complex interaction between bitumen and crumb rubber as well as the addition of warm-mix additives makes the typical laws of Newtonian fluids insufficient to describe the behaviors of highly modified bituminous binders. To systematically explore the non-Newtonian behaviors of CRMB, a dynamic shear rheometer was utilized to apply shear loading on the samples at various temperatures and shear rates. Results show that the viscosity of different binders are highly temperature- and shear rate-dependent, while highly modified binders exhibit more obvious shear-thinning behaviors at certain temperatures. With the help of zero shear viscosity and yield stress, the shear-thinning behaviors of non-Newtonian binders can be sufficiently characterized. The Arrhenius equation is invalid to describe viscosity-temperature characteristics of bitumen in the non-Newtonian region. A second-order polynomial function was proposed to characterize the viscosity-temperature dependence with a high correlation degree.
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Martinho, Fernando C. G., Luís G. Picado-Santos, Francisco M. S. Lemos, Maria Amélia N. D. A. Lemos, and Everton R. F. Santos. "Using Plastic Waste in a Circular Economy Approach to Improve the Properties of Bituminous Binders." Applied Sciences 12, no. 5 (February 28, 2022): 2526. http://dx.doi.org/10.3390/app12052526.
Повний текст джерелаАнотація:
This work aims to use wax to modify a binder employed in the paving industry. This wax can be obtained either directly or as a by-product from plastic waste′s thermal cracking (pyrolysis). The study characterizes this sustainable material and the binders resulting from blending it with conventional or modified bitumen with other additives applied in the manufacture of bituminous mixtures. Different tests were used: thermogravimetric and spectroscopic analysis; consistency tests; testing of dynamic viscosity at various temperatures; and assessment of the rheologic properties of binders. As a result, several crucial findings were reached: this sustainable wax promotes changes in the viscosity of the binders, their handling temperatures can be reduced, and it contributes to some goals of the U.N. 2030 Agenda. In summary, this work allowed us to conclude that the positive effects of a suitable modification of the bituminous binders, which incorporated this wax and other additives, led to improved consistency and rheological behaviour, having provided, for example, lower temperature susceptibility and higher permanent deformation resistance.
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Fakhri, Mansour, Sajad Javadi, Reza Sedghi, Alireza Sassani, Ali Arabzadeh, and Behnam Baveli Bahmai. "Microwave Induction Heating of Polymer-Modified Asphalt Materials for Self-Healing and Deicing." Sustainability 13, no. 18 (September 10, 2021): 10129. http://dx.doi.org/10.3390/su131810129.
Повний текст джерелаАнотація:
This study evaluates the influence of polymer-modification on the induction heating capability of asphalt mastic in a microwave field, and investigates how effectively this approach can be utilized for ice melting and self-healing purposes. To this end, different asphalt mastic mixtures with different polymer-modification and mixing procedures were tested under microwave field exposure for induction heating capability, ice-melting ability, and self-healing capacity. The mixtures were made through warm-mix and hot-mix procedures with four bituminous binders, including virgin (unmodified) asphalt and the same binder modified with three types of polymers. The results showed the effectiveness of microwave induction heating of asphalt mastic for both crack-healing and deicing purposes. The binder type was found to influence the ice melting and crack healing rates, such that using a warm-mix asphalt binder resulted in a more efficient heat generation and conduction than using a virgin asphalt binder. While polymer-modification undermined induction-heating, ice-melting, and self-healing performances, SBS-modified asphalt binders exhibited better performance than the other polymer-modified binders.
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Santagata, Ezio, Orazio Baglieri, Lucia Tsantilis, and Davide Dalmazzo. "Rheological Characterization of Bituminous Binders Modified with Carbon Nanotubes." Procedia - Social and Behavioral Sciences 53 (October 2012): 546–55. http://dx.doi.org/10.1016/j.sbspro.2012.09.905.
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Julaganti, Ashok, Rajan Choudhary, and Abhinay Kumar. "Moisture susceptibility of WMA mixes with modified bituminous binders." Petroleum Science and Technology 35, no. 10 (May 19, 2017): 1014–21. http://dx.doi.org/10.1080/10916466.2017.1303721.
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Moretti, Laura, Nico Fabrizi, Nicola Fiore, and Antonio D’Andrea. "Mechanical Characteristics of Graphene Nanoplatelets-Modified Asphalt Mixes: A Comparison with Polymer- and Not-Modified Asphalt Mixes." Materials 14, no. 9 (May 7, 2021): 2434. http://dx.doi.org/10.3390/ma14092434.
Повний текст джерелаАнотація:
In recent years, nanotechnology has sparked an interest in nanomodification of bituminous materials to increase the viscosity of asphalt binders and improves the rutting and fatigue resistance of asphalt mixtures. This paper presents the experimental results of laboratory tests on bituminous mixtures laid on a 1052 m-long test section built in Rome, Italy. Four asphalt mixtures for wearing and binder layer were considered: two polymer modified asphalt concretes (the former modified with the additive Superplast and the latter modified with styrene–butadiene–styrene), a “hard” graphene nanoplatelets (GNPs) modified asphalt concrete and a not-modified mixture. The indirect tensile strength, water sensitivity, stiffness modulus, and fatigue resistance of the mixtures were tested and compared. A statistical analysis based on the results has shown that the mixtures with GNPs have higher mechanical performances than the others: GNP could significantly improve the tested mechanical performances; further studies will be carried out to investigate its effect on rutting and skid resistance.
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TRACHEVSKYI, V. V., K. O. IVANENKO, and O. M. FAINLEIB. "MODIFICATION OF BITUMINOUS BINDERS FOR ASPHALT CONCRETE PAVEMENTS." Polymer journal 43, no. 3 (September 20, 2021): 149–71. http://dx.doi.org/10.15407/polymerj.43.03.149.
Повний текст джерелаАнотація:
The review is devoted to the analysis of modern research in the development of formulations and technology for the manufacture of composites based on bituminous binders for the creation of improved asphalt concrete. Methods for modification of bitumen by polymer additives, chemical stabilizers, industrial wastes (recycled polymers, ground tire rubber, fly ash, etc.), nanodispersed additives and carbon nanomaterials to obtain the necessary predetermined properties are considered. The positive and negative aspects of using various modifiers are analyzed. The efficiency of modification of bituminous binders with recycled polymers and nano(ultra)dispersed fillers is shown, which makes it possible to create composites based on bituminous binders for asphalt concrete pavements with high performance characteristics. The optimal content of additives to the bitumen binder has been analyzed: the amount of thermoplastic polymers and thermoplastic elastomers in the range of 3-10 wt.%, thermosetting polymers − over 10 wt.%, elastomers − up to 15 wt.%, and nano-sized additives: nano-oxides ≥ 5 wt.%, nanoclay ~ 3 wt. %, carbon nanotubes, graphene < 1.2 wt.%. Modification of bitumen with recycled polymers and partial replacement of expensive polymer modifiers with cheaper polymer waste, composite modifiers, namely recycled polymer mixed with ground tire rubber and / or fly ash are considered. This allows solving the environmental problems (waste utilization and secondary use) and reduce the cost of asphalt concrete. From the analysis of the experimental results, it becomes clear that for prediction of the properties of modified asphalt concrete, the basic characteristics of the original bitumen, which can differ significantly, are important, as well as the type of modifier (combination of modifiers), its chemical nature, and the efficiency of its dispersing in bitumen. The different chemical composition of the initial bitumen and its physicochemical properties probably play a primary role in imparting high and low temperature properties to asphalt concrete. Modification of a bituminous binder with waste polymers and nanofillers, first of all, makes it possible to improve such important performance characteristics of bitumen and asphalt concrete, such as softening temperature, penetration, penetration index, ductility, viscosity, moisture resistance, complex shear modulus, rutting parameter, resistance to cracking, etc.
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Radziszewski, Piotr, Michał Sarnowski, Piotr Pokorski, Karol J. Kowalski, and Jan Król. "High temperature properties of modified bituminous binders produced in Poland." MATEC Web of Conferences 262 (2019): 05011. http://dx.doi.org/10.1051/matecconf/201926205011.
Повний текст джерелаАнотація:
Bitumen used for the construction of road pavements should exhibit adequate resistance to loads at high operating temperatures. An effective method of improving the properties of bitumen is their modification. To evaluate the high-temperature properties of bitumen, standard consistency tests and advanced rheological tests under dynamic load are conducted. The main purpose of the article is to assess the high temperature properties of modified binders produced by two major Polish producers. The assessment was based on the tests results of modified binders in the range of the standard softening point temperature test and tests in the dynamic shear rheometer (DSR) according to the requirements of Strategic Highway Research Program (SHRP) and Multiple Stress Creep Recovery Test (MSCR). It has been shown that due to the highest operating temperatures of road pavements in Poland, produced bituminous binders meet the requirements of resistance to permanent deformation with a great reserve.
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Gaudenzi, Elena, Fabrizio Cardone, Xiaohu Lu, and Francesco Canestrari. "Analysis of Fatigue and Healing Properties of Conventional Bitumen and Bio-Binder for Road Pavements." Materials 13, no. 2 (January 16, 2020): 420. http://dx.doi.org/10.3390/ma13020420.
Повний текст джерелаАнотація:
The analysis of fatigue behavior of bituminous binders is a complex issue due to several time-temperature dependent phenomena which interact simultaneously, such as damage accumulation, viscoelasticity, thixotropy, and healing. The present research involves rheological measurements aimed at evaluating the fatigue behavior and compares the self-healing capability of two plain bitumen and a bio-binder obtained by partially replacing one of the plain bitumen with a renewable bio-oil. Healing potential was assessed by means of an experimental approach previously implemented for modified bitumen and bituminous mastic and based on the use of a dynamic shear rheometer (DSR). The effects of some variables such as bitumen type, bio-oil addition, and aging on the healing potential of binders were taken into account. Results showed that the above-mentioned method for healing analysis is also suitable for conventional and bio-add binders. Outcomes of the experimental investigation highlight that fatigue and self-healing are mainly dependent on binder consistency and also affected by aging. Finally, the addition of bio-oil may induce even better performances in terms of healing potential compared to conventional bitumen, especially in aged condition.
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Remišová, Eva, Viera Zatkaliková, and František Schlosser. "Study of Rheological Properties of Bituminous Binders in Middle and High Temperatures." Civil and Environmental Engineering 12, no. 1 (May 1, 2016): 13–20. http://dx.doi.org/10.1515/cee-2016-0002.
Повний текст джерелаАнотація:
Abstract The bitumen binders in road pavements are exposed traffic loading effect at different climatic conditions. A resistance to these stresses depends on bitumen properties as well. The paper presents rheological properties (G*, δ, ν*) determined and compared for four bituminous binders (unmodified and polymer modified bitumen) at temperature 46 – 60 (80) °C and dynamic viscosity at temperature 130 – 190 °C (Brookfield viscometer). On the basis of viscosity results it is possible to set optimal production and compaction temperatures. Elastic and viscous behavior of binder in the middle temperature is determined in rheometers. The higher value of complex modulus, the stiffer bitumen binder is able to resist deformation. The greater content of elastic components (e.g. polymer in bitumen) varies mainly elastic-viscous properties of primary bitumen.
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Mieczkowski, Paweł, Bartosz Budziński, Mieczysław Słowik, Jan Kempa, and Wojciech Sorociak. "Experimental Study of Tensile Properties of Styrene–Butadiene–Styrene Modified Asphalt Binders." Materials 14, no. 7 (April 1, 2021): 1734. http://dx.doi.org/10.3390/ma14071734.
Повний текст джерелаАнотація:
The requirements imposed on road pavements are ever increasing nowadays, necessitating the improvement of the properties of paving materials. The most commonly used paving materials include bituminous mixtures that are composed of aggregate grains bound by a bituminous binder. The properties of bitumens can be improved by modification with polymers. Among the copolymers used for modifying bitumens, styrene–butadiene–styrene, a thermoplastic elastomer, is the most commonly used. This article presents the results of tests conducted on bitumens modified with two types of styrene–butadiene–styrene copolymer (linear and radial). Two bitumen types of different penetration grades (35/50 and 160/220) were used in the experiments. The content of styrene–butadiene–styrene added to the bitumen varied between 1% and 6%. The results of the force ductility test showed that cohesion energy can be used for qualitative evaluation of the efficiency of modification of bitumen with styrene–butadiene–styrene copolymer. The determined values of the cohesion energy were subjected to the original analysis taking into account the three characteristic elongation zones of the tested binders. The performed analyses made it possible to find a parameter whose values correlate significantly with the content of styrene–butadiene–styrene copolymer in the modified bitumen. With smaller amounts of added modifier (approximately 2%), slightly better effects were obtained in the case of linear copolymer styrene–butadiene–styrene and for larger amounts of modifier (5–6%) radial copolymer styrene–butadiene–styrene was found to be more effective. This is confirmed by the changes in the binder structure, as indicated by the penetration index (PI).
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Rather, Zahid Amain, Er. Ravinder Singh, and Dr Puja Sharma. "Use of Rice Husk Ash and Domestic Plastic Wastes in Bituminous Concrete (BC)." International Journal of Research in Informative Science Application & Techniques (IJRISAT) 3, no. 5 (May 10, 2019): 1–11. http://dx.doi.org/10.46828/ijrisat.v3i5.84.
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This paper presents the experimental results on the utilization of Rice Hush Ash (RHA) and Domestic Plastic Wastes as a replacement for mineral filler and Optimum binder content (OBC) in bituminous concrete mixes. Bituminous concrete mixes containing Rice Husk Ash and Domestic Plastic Wastes at different amounts and control specimens were prepared in accordance to Marshall Mix design, and their performance on stability, flow and bulk density were evaluated. Optimum binder content (OBC) and voids analysis were also conducted to compare performance of Rice Husk Ash and Domestic Plastic Wastes at different contents. Results reveal that all Rice Husk Ash and Domestic Plastic Wastes mixes have satisfied the Public Works Department (PWD) specification and MORTH specification on wearing course in regard with Marshall Stability and Flow. This material is potentially to be used as partial or full substitution of mineral filler (stone dust) and Optimum binder content (OBC) in pavement construction. Modified bituminous mixes are expected to give higher life of surfacing depending upon degree of modification and type of additives used. The present study aims at developing bituminous mixes for the Bituminous Concrete (BC) Grade 1 incorporating the plastic wastes, waste tyre tubes and rice husk ash as partial replacement of the bitumen content. In this study, the Stability-Flow analysis for the various BC Grade 1 mixtures with modified binders and with different percentage replacement of bitumen with plastic wastes, waste tyre tubes and rice husk ash are reported.
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Saltan, Mehmet, Gizem Kaçaroğlu, and Öznur Karadağ. "Hot Mixture Performances of Bituminous Binders Modified with Soybean Oil." Advances in Civil Engineering Materials 9, no. 1 (August 5, 2020): 20200015. http://dx.doi.org/10.1520/acem20200015.
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Yu, Jiangmiao, Zhibin Ren, Zheming Gao, Qi Wu, Zihan Zhu, and Huayang Yu. "Recycled Heavy Bio Oil as Performance Enhancer for Rubberized Bituminous Binders." Polymers 11, no. 5 (May 4, 2019): 800. http://dx.doi.org/10.3390/polym11050800.
Повний текст джерелаАнотація:
Asphalt rubber (AR) is a sustainable paving material with merits including waste tire consumption, low traffic noise, and enhanced mechanical performance. However, the poor workability and storage stability limited its further application. This study attempted to alleviate these two concerns of AR simultaneously by incorporating heavy bio oil (HBO). To achieve this goal, bio-AR binders with three different mixing sequences were prepared. A series of rheological and chemical tests were conducted. Test results prove that the bio-AR binders exhibited superior rutting and fatigue resistance compared to AR binder. The viscosity values of bio-ARs were closed to AR modified with commercial warm mix additive, which indicates enhancement in workability. Due to the relatively high density of HBO, the density difference between the asphalt liquid phase and crumb rubber in the bio-AR system narrowed, which brought improved storage stability. Among bio-ARs prepared with different mixing sequences, the direct mixing one (ARB) had the most satisfied overall performance. The early incorporation of HBO had limited negative influence on binder performance, but allowed for more energy saving during the bio-AR binder production. Future study will be conducted on performance of bio-AR mixtures and quantitative estimation of its energy saving during the blending and compacting process.
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Mohd Akhir, N., B. Idiajir, L. Gungat, S. Harun, M. N. Borhan, and N. I. Md Yusoff. "Physical properties of palm oil boiler ash modified bitumen with Rediset." IOP Conference Series: Materials Science and Engineering 1229, no. 1 (February 1, 2022): 012009. http://dx.doi.org/10.1088/1757-899x/1229/1/012009.
Повний текст джерелаАнотація:
Abstract This study examines the physical properties of a 60/70 penetration grade bitumen modified using warm mix asphalt (WMA) additive, Rediset and palm oil boiler ash (POBA) as a modifier. Modified binders were prepared by adding 2% of Rediset with different POBA contents (3, 5, 7, and 9%) through wet mixing process. Physical properties of modified bituminous binder were obtained from penetration, softening point, rotational viscosity and ductility tests. The addition of 7% POBA in WMA binder has the best characteristics in term of its physical properties. The penetration values, softening point temperatures and ductility characteristics show inconsistent patterns. However, the rotational viscosity of each combination had decreased with the increment of temperature even though the trend was not significantly constant. Penetration index (PI) showed an increment with 3 and 5% and decrement pattern on 7 and 9% as well as penetration viscosity number (PVN) showing an inconsistent decrement with the addition of POBA. From the results, it can be concluded that using POBA in WMA binder for pavement construction is a viable option and can be further investigated.
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Dong, Yu Ming, and Yi Qiu Tan. "Laboratory Study on Properties of Tire Crumb Rubber Modified Bituminous Mixture." Advanced Engineering Forum 5 (July 2012): 219–23. http://dx.doi.org/10.4028/www.scientific.net/aef.5.219.
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Abstract: This paper investigates the laboratory properties of tire crumb rubber modified (CRM) bitumen mixture. Two types of mixtures containing two binders (pen90 bitumen; CRM bitumen) were used to produce Marshall Sample and determine optimum content. Mechanical performances of bituminous mixtures were evaluated by Chinese wheel rutting test (WRT), 3point beam bending test (3P-BBT) at low temperature, indirect tensile Strength test (ITST) at freezing-thawing cycles. Superpave gyratory compactor (SGC) specimens also were prepared for modulus test. Resilient modulus (E) data were obtained by unconfined uni-axial compression test according to the specification of China. Dynamic modulus (E★) data were obtained by Simple Performance Test (SPT). Two temperatures were used at dynamic modulus test. The results indicate that CRM bituminous mixture performs better than referenced bituminous mixture on viscoelastic behavior, rutting resistance, cracking resistance and moisture stability.
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Maciejewski, Krzysztof, and Anna Chomicz-Kowalska. "Foaming Performance and FTIR Spectrometric Analysis of Foamed Bituminous Binders Intended for Surface Courses." Materials 14, no. 8 (April 19, 2021): 2055. http://dx.doi.org/10.3390/ma14082055.
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This study explores the effects of foaming on three selected bituminous binders: 50/70 paving grade bitumen, 45/80-55 polymer modified bitumen and 45/80-80 HiMA binder. The first part of the investigations included the evaluation of the foaming performance in terms of foaming temperature and foaming water content with the utilization of desirability functions and based on the equality of maximum expansion ratio and bitumen foam half-life. The second part of the study investigated the effects of foaming on the chemical structure of the binders using Fourier-transform infrared spectroscopy. The results of the spectroscopic measurements permitted calculation of structural indices specific to functional groups associated with bitumen oxidation, as well as those indicative of elastomeric modification. The results have shown that the different types of bitumen exhibited different foaming characteristics, which was most evident in bitumen foam half-lives, with the HiMA binder performing the best. The spectrometric measurements did not show any significant effects of foaming on the chemical structure of the evaluated binders related to oxidative stress, neither were any major changes in the PmB-specific regions found.
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Hamid, Anzar. "A Comprehensive Study on use of Modified Binders in Bituminous Mixes." International Journal of Civil Engineering 6, no. 1 (January 25, 2019): 22–24. http://dx.doi.org/10.14445/23488352/ijce-v6i1p104.
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Çelik, Osman Nuri, and Cengiz Duran Atiş. "Compactibility of hot bituminous mixtures made with crumb rubber-modified binders." Construction and Building Materials 22, no. 6 (June 2008): 1143–47. http://dx.doi.org/10.1016/j.conbuildmat.2007.02.005.
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Gao, Yangming, Linglin Li, and Yuqing Zhang. "Modeling Crack Propagation in Bituminous Binders under a Rotational Shear Fatigue Load using Pseudo J-Integral Paris’ Law." Transportation Research Record: Journal of the Transportation Research Board 2674, no. 1 (January 2020): 94–103. http://dx.doi.org/10.1177/0361198119899151.
Повний текст джерелаАнотація:
Fatigue resistance of bituminous binders plays a critical role in determining the fatigue performance of asphalt pavements. It is reported in the literature that, under a rotational shear fatigue load like a dynamic shear rheometer (DSR) test, the crack grows in the cylindrical bitumen sample as a circumferential crack that is initiated at the periphery of the sample and propagates toward the center of the sample. This study aims to model this crack propagation in bituminous binders under rotational shear fatigue load by time sweep (TS) fatigue test using the DSR. The crack length in the TS test is determined using a damage mechanics-based DSR-C model which is a function of the shear moduli and phase angles under undamaged and damaged conditions. The crack evolution is modeled by a pseudo J-integral based Paris’ law. Samples of virgin bitumen 40/60 and polymer-modified bitumen X-70 under unaged and aged conditions are tested by the TS tests at different temperatures, frequencies, and strain levels. Results show that the pseudo J-integral Paris’ law is able to predict accurately the crack propagation in bituminous binders under the rotational shear fatigue load. The crack grows faster in aged bitumen or at lower temperatures. The Paris’ law model parameters ( A and n) are independent of loading frequency or load amplitude. They are fundamental material properties and can be determined at one loading frequency and amplitude, then can be implemented to predict the growth of cracks in bituminous binders at different loading frequencies or amplitudes.
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Zanetti, Maria Chiara, Barbara Ruffino, Arianna Vercelli, Davide Dalmazzo, and Ezio Santagata. "Reuse of paint sludge in road pavements: Technological and environmental issues." Waste Management & Research: The Journal for a Sustainable Circular Economy 36, no. 11 (October 15, 2018): 1023–28. http://dx.doi.org/10.1177/0734242x18804628.
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This paper presents some of the results obtained in a research project focused on the use of paint sludge (PS) as a modifying agent in the production of bituminous binders for paving applications. The scope of the project was to provide an innovative, sustainable and profitable solution to waste management problems which automotive industries have to face worldwide as a result of the production of PS. The authors applied for a patent which defines the industrial process for the production of PS modified binders (PSMBs). Measurements and analyses which were considered relevant for the assessment of technological feasibility included evaluation of: PS physical characteristics, PSMB high-temperature viscosity and PSMB storage stability. Environmental issues were addressed by considering PS chemical composition, gaseous emissions during PSMB production, and leaching behavior of bituminous mixtures containing PSMBs. Obtained results show that with a proper adaptation of the PSMB production process (i.e., PS drying at a higher temperature than 105°C) it is possible to comply with technological and environmental requirements such as those related to storage stability and to gaseous emissions during PSMB production and laying of bituminous mixtures. Leaching tests, aimed to evaluate runoff water quality, show no substantial difference in the release of substances in water between standard bituminous mixtures and bituminous mixtures prepared with PSMBs.
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Vaitkus, Audrius, Ovidijus Šernas, Viktoras Vorobjovas, and Judita Gražulytė. "Selection of Constituent Materials for Asphalt Mixtures of Noise-Reducing Asphalt Pavements." Baltic Journal of Road and Bridge Engineering 14, no. 2 (June 27, 2019): 178–207. http://dx.doi.org/10.7250/bjrbe.2019-14.439.
Повний текст джерелаАнотація:
Road traffic noise is a widespread problem, especially in the densely populated cities of Europe. Exposure to high levels of (traffic) noise leads to health problems, such as stress, sleep disturbance and even heart diseases. Noise-reducing asphalt pavements are more frequently developed and selected as a first noise abatement solution. Performance of noise-reducing asphalt pavement depends on the composition and properties of asphalt mixture components, and pavement properties such as layer thickness, voids in pavement, texture. Design of asphalt mixture for the noise-reducing asphalt pavements is even more complicated for severe and cold climate regions where significant temperature fluctuations and many of frost-thaw cycles occur. Thus, the balance between mechanical and acoustical durability depends on the proper selection of asphalt mixture components. Components of these asphalt mixtures have primarily to be tested to determine their physical and mechanical properties. The main aim of this research is to evaluate properties of local aggregates, bituminous binders, and regarding test results, select the most suitable materials for the design of high-quality, durable asphalt mixture for noise-reducing asphalt pavements. The research showed that Granite A is the most suitable aggregate for the design of asphalt mixtures for noise-reducing asphalt pavement. Short-term and particularly long-term ageing of polymer modified bituminous binder PMB 45/80-65 and PMB 25/55-60 decreases the number of aromatics and increases the amount of resins. Based on Multiple Stress Creep and Recovery test results, it is assumed that all bituminous binders selected for research are suitable for the asphalt mixture design of noise-reducing asphalt pavement in terms of resistance to rutting. However, considering all tests results, bituminous binder PMB 45/80-65 (1) showed the best performance and was the most suitable for the asphalt mixture design of noise-reducing asphalt pavement.
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Osman, H., M. R. M. Hasan, N. Mukhtar, M. F. H. M. Ghazali, and N. A. A. Raman. "Effects of Alkylamines-Based and Polyalkylene Glycol-Based Bonding Enhancers on the Performance of Asphalt Binders." IOP Conference Series: Earth and Environmental Science 920, no. 1 (November 1, 2021): 012021. http://dx.doi.org/10.1088/1755-1315/920/1/012021.
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Abstract The premature deterioration of asphalt pavements usually occurs due to different moisture damage mechanisms resulting in stripping, ravelling, potholes, and disintegration without proper treatment. Numerous efforts have been taken into consideration to improve the bonding between materials, hence prolonging the pavement life. This study evaluates the performance of asphalt binders incorporating Alkylamines-based (ALM) and Polyalkylene Glycol-based (PLG) bonding enhancers. Each bonding enhancer at 0.5% and 1.0% based on the weight of asphalt binder was separately blended with the conventional asphalt binder 60/70 penetration grade using a high shear mixer at 1000 rpm for 30 minutes at 160°C. The physical and rheological properties of modified binders were evaluated through penetration value, softening point, ductility, elastic recovery, rotational viscosity (RV), and dynamic shear rheometer (DSR) tests. Overall, additions of ALM and PLG show identical penetration grade compared to the control sample. Both ALM and PLG showcase a higher ductility and elastic recovery than the neat binder. The DSR test indicates the incorporation of bonding enhancers improves the modified binders’ rutting performance. While the application of ALM at 0.5% dosage increased the binder failure temperature out of all the tested samples, where the failure temperature is at 70°C, compared to others at 64°C. Studies at mastics and mixture levels should be conducted to appropriately understand the effect of bonding enhancer on the bituminous materials.
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Apostolidis, P., X. Liu, C. Kasbergen, M. F. C. van de Ven, G. Pipintakos, and A. Scarpas. "Chemo-Rheological Study of Hardening of Epoxy Modified Bituminous Binders with the Finite Element Method." Transportation Research Record: Journal of the Transportation Research Board 2672, no. 28 (August 17, 2018): 190–99. http://dx.doi.org/10.1177/0361198118781377.
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The chemical irreversible hardening of epoxy modified bitumen is affected by various physical factors and the successful application of this technology is directly linked with full understanding of chemo-rheological material characteristics. This study proposes a model to describe the material viscosity evolution during hardening of epoxy modified bitumen. The findings from numerical analyses performed to assess the mechanical response of epoxy modified bituminous binders are presented. Information of the chemical interaction of epoxy within a bituminous matrix was collected and all the influential factors have been determined. The proposed chemo-rheological model accounting for the polymerization of the epoxy in the bitumen was formulated and the sensitivity of material parameters, such as activation energy, reaction order and extent of hardening reaction until the gel point of epoxy modified binders, was demonstrated. Results of the analyses suggest that lower levels of activation energy increase the degree of hardening and the rate of viscosity development. By decreasing the hardening reaction until the gel point the achieved viscosity of epoxy modified bitumen was increased showing the importance of gel reaction extent on material viscosity evolution. The numerical studies have shown also that the polymerization rate in the epoxy modified bitumen is highly dependent on the temperature under various (non-) isothermal conditions. Also, the polymerization rate should be considered through all the material curing processes to avoid unwanted variations in the mechanical properties.
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Gordeeva, I. V., Yu A. Naumova, T. V. Dudareva, I. A. Krasotkina, and V. G. Nikol'skiy. "COMPOSITE MODIFICATOR OF ASPHALT-CONCRETE OBTAINED BY THE METHOD OF HIGH-TEMPERATURE SHEAR-INDUCED GRINDING OF CRUMB RUBBER AND SBS THERMOELASTOPLAST." Fine Chemical Technologies 13, no. 5 (October 28, 2018): 38–48. http://dx.doi.org/10.32362/2410-6593-2018-13-5-38-48.
Повний текст джерелаАнотація:
The mandatory requirement for creating high-quality asphalt concrete is the modification of the bituminous binder. Either polymers, typically SBS, or crushed vulcanizates are usually used as modifiers. Using the polymer modifier has a number of disadvantages: the poor compatibility of polymers with bitumen, the stratification of the modified binder during transportation and storage, the coalescence of the dispersed phase particles at the coating laying temperatures. The use of crushed vulcanizate as a modifier is limited due to the complexity of obtaining a particle with a micro-size and complex surface organization. By now a binary mixed powder "Polyepor-RP" based on rubber crumb and butadiene-styrene thermoplastic elastomer has been developed and obtained. It combines the advantages of both types of initial constituents and eliminates their shortcomings. The hybrid modifier is obtained by the method of high-temperature shear grinding. In addition, thanks to the use of modern rotary dispersants, the resulting hybrid modifier can be introduced into the asphalt mixture by uniformly loading it into the mixer at the closing stage of mixing, bypassing the long and energy-consuming stage of preparing the modified bituminous binder. The paper describes the comparative analysis of the rheological properties of four types of asphalt binders in accordance with the American testing system "SuperРave": unmodified bitumen of BND 60/90 grade; polymer-bitumen binder; bitumen modified with active rubber powder brand "Polyepor-A" and active binary powder brand "Polyepor-RP". It is established that the introduction of modifiers "Polyepor-A" and "Polyepor-RP" increases the resistance of asphalt pavement to the formation of ruts and increases the resistance to fatigue cracking. The introduction of the butadiene-styrene thermoplastic elastomer into bitumen has a positive effect only on the resistance to rutting. Using a hybrid modifier it is possible to obtain a rubberpolymer binder characterized by higher stability, resistant to delamination and phase separation, which will increase the durability of coatings
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Porto, Michele, Paolino Caputo, Valeria Loise, Abraham A. Abe, Giulia Tarsi, Cesare Sangiorgi, Francesco Gallo, and Cesare Oliviero Rossi. "Preliminary Study on New Alternative Binders through Re-Refined Engine Oil Bottoms (REOBs) and Industrial By-Product Additives." Molecules 26, no. 23 (November 30, 2021): 7269. http://dx.doi.org/10.3390/molecules26237269.
Повний текст джерелаАнотація:
Recent studies have worked towards addressing environmental issues such as global warming and greenhouse gas emissions due to the increasing awareness of the depletion of natural resources. The asphalt industry is seeking to implement measures to reduce its carbon footprint and to promote sustainable operations. The reuse of several wastes and by-products is an example of a more eco-friendly activity that fulfils the circular economy principle. Among all possible solutions, the road pavement sector encourages, on one hand, the use of recycled materials as a partial replacement of the virgin lithic skeleton; on the other hand, it promotes the use of recycled materials to substituting for a portion of the petroleum bituminous binder. This study aims to use Re-refined Engine Oil Bottoms (REOBs) as a main substitute and additives from various industrial by-products as a full replacement for virgin bitumen, producing high-performing alternative binders. The REOBs have been improved by utilizing additives in an attempt to improve their specific properties and thus to bridge the gap between REOBs and traditional bituminous binders. An even larger amount of virgin and non-renewable resources can be saved using these new potential alternative binders together with the RAP aggregates. Thus, the reduction in the use of virgin materials is applied at the binder and the asphalt mixture levels. Rheological, spectroscopic, thermogravimetric, and mechanical analysis were used to characterize the properties, composition, and characteristics of the REOBs, REOB-modified binders, and asphalt mixes. Thanks to the rheological investigations of possible alternative binders, 18 blends were selected, since they behaved like an SBS-modified bitumen, and then they were used for producing the corresponding asphalt mixtures. The preliminary mechanical analysis of the asphalt mixtures shows that six mixes have promising responses in terms of stiffness, tensile resistance, and water susceptibility. Nevertheless, the high variability of recycled materials and by-products has to be taken into consideration during the definition of alternative binders and recycled asphalt mixtures. In fact, this study highlights the crucial effects of the chemical composition of the constituents and their compatibility on the behaviour of the final product. This preliminary study represents a first attempt to define alternative binders, which can be used in combination with recycled aggregates for producing more sustainable road materials. However, further analysis is necessary in order to assess the durability and the ageing tendency of the materials.
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Valentin, J., J. Trejbal, V. Nežerka, T. Valentová, P. Vacková, and P. Tichá. "A comprehensive study on adhesion between modified bituminous binders and mineral aggregates." Construction and Building Materials 305 (October 2021): 124686. http://dx.doi.org/10.1016/j.conbuildmat.2021.124686.
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Djimasbe, R., V. B. Ivanov, A. F. Kemalov, R. A. Kemalov, T. F. Valeev, and N. Nerobov. "Research of the technology for the production of modified sulfur bituminous binders." Proceedings of the Voronezh State University of Engineering Technologies 80, no. 2 (October 2, 2018): 270–74. http://dx.doi.org/10.20914/2310-1202-2018-2-270-274.
Повний текст джерелаАнотація:
In this article, a review of the literature on the technology for producing elemental sulfur-based paving material was reviewed, and a laboratory test of this technology was conducted at the Department of Highly Viscous Crude Oil and Bitumen. Natural. Attempts to mix sulfur with bitumen to reduce the cost of road construction and sulfur use were undertaken earlier, but the resulting blends did not provide the appropriate quality and the process was difficult to implement. The article proposes a unique technology to obtain not a physical mixture, but the formation of a chemical bond between sulfur and bitumen with the formation of bitumen polymers. This technology becomes possible with the use of a catalyst specially developed by the initiators of the project and has no equivalent in the world practice. And we add that the subject of the production of sulfur bitumen is not a question of actuality on the one hand since 1970, many researchers are interested in this subject but as with the abundance of oil and no one question about alternative solutions, and today with the reduction of traditional oil this theme is really soliciting.
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Airey, G. D., J. R. A. Grenfell, A. Apeagyei, A. Subhy, and D. Lo Presti. "Time dependent viscoelastic rheological response of pure, modified and synthetic bituminous binders." Mechanics of Time-Dependent Materials 20, no. 3 (April 4, 2016): 455–80. http://dx.doi.org/10.1007/s11043-016-9295-y.
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Djimasbe, R., A. F. Kemalov, and R. A. Kemalov. "Research of the Technology for the Production of Modified Sulfur Bituminous Binders." International Journal of Engineering & Technology 7, no. 4.7 (September 27, 2018): 123. http://dx.doi.org/10.14419/ijet.v7i4.7.20526.
Повний текст джерелаАнотація:
In this article, a review of the literature on the technology of production of a paving material based on elemental sulfur was made, and a laboratory test of this technology was carried out at the Department of Highly Viscous Crude Oil and Natural Bitumen. Attempts to mix sulfur with bitumen in order to reduce the cost of road construction and sulfur utilization were undertaken earlier, however, the mixtures obtained did not provide the appropriate quality, and the process was difficult to implement. The article proposes a unique technology for obtaining not a physical mixture, but the formation of a chemical bond between sulfur and bitumen with the formation of bitumen polymers. This technology becomes possible with the use of a catalyst specially developed by the initiators of the project and has no analogues in the world practice. Thus, the scientific novelty of the study is determined by the fact that for the first time an analysis is made of the composition of the components of the complex, which are subsequently introduced into the mixture with the feedstock in order to obtain the target product, which is gray-bitumen.
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Meng, Yongjun, Yongjie Liao, Zhirong Liu, Jing Chen, Xiaolong Yang, and Hongliu Rong. "Study on Rheological Properties of Bituminous Binders and Mixtures Containing Waste Printed Circuit Boards (PCBs) and SBR Compound Modified Bitumen." Materials 14, no. 7 (March 30, 2021): 1697. http://dx.doi.org/10.3390/ma14071697.
Повний текст джерелаАнотація:
Improper handling of waste printed circuit boards (PCBs) can cause serious pollution to the water and soil environments. In order to explore a new method of recycling waste PCBs, this study investigated the effect of PCBs and butadiene styrene rubber (SBR) on the rheological properties of neat bitumen. The dynamic shear rheological (DSR) test was used to study the effect of different PCB contents on the high-temperature rheological properties of SBR-modified bitumen. Fluorescence microscopy and Fourier-transform infrared spectroscopy were used to study the microstructure change law and modification mechanism of PCB and SBR composite modified bitumen. Finally, the feasibility of the bitumen properties was verified through a test of the bituminous mixture properties. The DSR test results showed that the addition of PCBs improves the elastic recovery modulus, dynamic shear modulus, and rutting factor of SBR-modified bitumen, indicating that the high-temperature properties were improved. Infrared spectroscopy analysis revealed that a new absorption peak was generated in the infrared spectrum of the compound bitumen after the addition of PCBs, and the intensity of the original absorption peak also changed, indicating that PCBs and SBR-modified bitumen were mainly physically blended and accompanied by a weak chemical reaction. It was further found that the absorption peak of the unsaturated C=C double bond was significantly enhanced, and the increase in the content of the unsaturated bond C=C in the main chain of the polymer significantly increases the stiffness of the bitumen. Macroscopically, the high-temperature rutting resistance was improved to a certain extent. The fluorescence diagram shows that when PCBs do not exceed 10%, the PCBs can form a homogeneous structure and be dispersed in SBR-modified bitumen. The road test of PCBs and SBR composite modified bituminous mixtures showed that PCBs can significantly improve the rutting resistance and water stability of SBR-modified bitumen at high temperatures at the recommended optimum content. The crack resistance at low temperatures is weakened but still meets actual engineering requirements. The correlation analysis between the properties of bitumen and bituminous mixtures is carried out based on grey correlation theory. The results show that the index of modified bitumen has a very good guiding effect on the bituminous mixture properties. The development of PCBs and SBR composite-modified bitumen provides a new practical method for recycling waste PCBs.