Статті в журналах з теми "Road tunnels. reclaimed asphalt pavement"
Щоб переглянути інші типи публікацій з цієї теми, перейдіть за посиланням: Road tunnels. reclaimed asphalt pavement.
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 статей у журналах для дослідження на тему "Road tunnels. reclaimed asphalt pavement".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте статті в журналах для різних дисциплін та оформлюйте правильно вашу бібліографію.
1
Russo, Francesca, Rosa Veropalumbo, Salvatore Antonio Biancardo, Cristina Oreto, Fabio Scherillo, and Nunzio Viscione. "Reusing Jet Grouting Waste as Filler for Road Asphalt Mixtures of Base Layers." Materials 14, no. 12 (June 10, 2021): 3200. http://dx.doi.org/10.3390/ma14123200.
Повний текст джерелаАнотація:
Secondary raw materials consist of production waste or material resulting from recycling processes, currently in large quantities, which can be injected back into the economic system as new raw materials. This study proposes jet grouting waste (JGW) as filler for hot and cold asphalt mixtures applied as base layers of road pavements and investigates the physical and mechanical properties. JGW is derived from soil consolidation performed during underground roadway tunnel construction. The research compares three asphalt mixtures: (a) hot mixture containing limestone aggregate-filler (HMA), (b) HMA containing JGW (HMAJ), (c) cold recycled asphalt mixture containing JGW (CRAJ). Leaching tests of JGW and reclaimed asphalt pavement (RAP) were conducted; the best configurations of the three mixtures were determined by using the volumetric method through gyratory compaction. Three mastics with filler-to-binder ratios reflecting those of the asphalt mixtures were investigated through delta ring and ball test and frequency sweep test at 0.05% stress by using a dynamic shear rheometer. The morphology of each mixture was further investigated by scanning electron microscopy. The results showed that CRAJ with 28 days of curing time reached the indirect tensile strength (ITS) of HMA (0.73 MPa) within 14 days and, among all studied mixtures, returned the lowest cumulative strain, which was on average 30% lower than that of HMA and HMAJ. The results of this study have shown that the cold alternative mixture, CRAJ, promotes the reuse of two types of waste, RAP and JGW, as it fully meets the reference Italian Technical Standard and ensures good mixture performance in addition to conserving natural resources.
2
Veropalumbo, Rosa, Francesca Russo, Nunzio Viscione, and Salvatore A. Biancardo. "Rheological Properties Comparing Hot and Cold Bituminous Mastics Containing Jet Grouting Waste." Advances in Materials Science and Engineering 2020 (February 22, 2020): 1–16. http://dx.doi.org/10.1155/2020/8078527.
Повний текст джерелаАнотація:
The use of reclaimed asphalt pavement is a practice that is adding significant environmental value to road technologies, not only due to the reduction of materials sent to landfill but also because of the mechanical properties of the reclaimed asphalt (RA) that can be reused. This research focuses on the rheological properties of hot and cold bituminous mastics made up as follows: (1) hot mastics mixed with limestone filler (LF) and bitumen, (2) hot mastics, made from bitumen mixed with jet grouting waste (JW), a mixture of water, cement, and soil derived from land consolidation work in underground tunnels, and (3) hot mastics mixed with LF and JW as filler and bitumen. Three different ratios (0.3, 0.4, and 0.5) of filler per unit of neat bitumen (B50/70) were studied. The same number was used for mixing cold mastics, by using an appropriate laboratory protocol designed since the adoption of a cationic bituminous emulsion. A total of 18 mastics were prepared and investigated. The comparison was carried out using the frequency sweep (FS) test, analysing shear modulus G∗, applying the multistress creep and recovery (MSCR) test (40°C and 60°C) as well as the delta ring and ball (ΔR&B) test, focusing on two main issues: (1) the stiffening effect caused by the filler type used for mixing each mastic, and (2) a comparison, in terms of stiffening effects and nonrecoverable creep compliance (Jnr) of hot and cold mastic performance to highlight JW reuse in mastics. The results showed that the best G∗ performance at test temperatures higher than 30°C is given by cold mastic after 28 days of curing time when JW is added to LF and bitumen. The lowest Jnr value was 40°C and 60°C for the same mastic.
3
Widayanti, Ari, A. A. Soemitro Ria, Januarti Jaya Ekaputri, and Hitapria Suprayitno. "Characterization of Reclaimed Asphalt Pavement (RAP) as a road pavement material (National Road Waru, Sidoarjo)." MATEC Web of Conferences 181 (2018): 05001. http://dx.doi.org/10.1051/matecconf/201818105001.
Повний текст джерелаАнотація:
Reclaimed Asphalt Pavement (RAP) is a dredging pavement material using Cold Milling Machine. The application of Reclaimed Asphalt Pavement is increased year by year. Due to the increasing application of RAP year by year which implicates environment condition, especially in damaging natural resources, the research on material used in RAP needs to be conducted, so RAP can be optimally utilized. To achieve optimal performance, data of RAP characteristics reviewed from microstructural analysis is necessary. The objective of this research is to obtain the characteristics of Reclaimed Asphalt Pavement. The method used was literary study based on previous research. Material tests used were XRF, SEM and FTIR. The object of study was RAP material taken from national road Waru Sidoarjo. The major compositions of Reclaimed Asphalt Pavement obtained were Kaolin, Lithium, Tetraborate, Dextrin. SEM graphics showed the morphological and surface texture of RAP. FTIR graphic presented the functional group of Reclaimed Asphalt Pavement showing O-H C-O acid in the peak of graphic. From XRD result, the major compounds of Reclaimed Asphalt Pavement obtained were Calcium, Sodium, Aluminum, Silicate.
4
Mamun, A. A., and H. I. Al-Abdul Wahhab. "Evaluation of Waste Engine Oil-Rejuvenated Asphalt Concrete Mixtures with High RAP Content." Advances in Materials Science and Engineering 2018 (December 2, 2018): 1–8. http://dx.doi.org/10.1155/2018/7386256.
Повний текст джерелаАнотація:
The use of large proportions of reclaimed asphalt pavement is necessary to meet the increasing demand for road construction materials in a sustainable way. One of the challenges of using a greater percentage of reclaimed asphalt pavement (>30%) is the greater stiffness of mixes incorporating it. While this stiffness problem is usually resolved by using different commercial rejuvenators, there are circumstances in which commercial rejuvenators are not available. Therefore, this study evaluates the potential of using waste engine oil as a substitute for commercial rejuvenators for the higher percentage of reclaimed asphalt pavement that could meet the increasing demand in a more sustainable way. To assess the possibility of using a higher percentage of reclaimed asphalt pavement in road construction, different percentages of reclaimed asphalt pavement (30%, 40%, and 50%) are used. Following the property of the aged binder, three different percentages (7%, 13%, and 20%) of waste engine oil are considered. Each percent of waste engine oil is incorporated with one of the three mixes. The mixes (with the minimum required Marshall criteria) are evaluated for different properties, namely, their indirect tensile strength, resilient modulus, and durability. Finally, those properties are compared to those of the mixes rejuvenated by commercial rejuvenators. It is observed that, for the aforementioned properties, 7% to 13% of waste engine oil is identical to the commercial rejuvenator for the mixes with 30% to 40% of reclaimed asphalt pavement.
5
Alamri, Mohammed, Qing Lu, and Chunfu Xin. "Preliminary Evaluation of Hot Mix Asphalt Containing Reclaimed Epoxy Asphalt Materials." Sustainability 12, no. 9 (April 26, 2020): 3531. http://dx.doi.org/10.3390/su12093531.
Повний текст джерелаАнотація:
Designing long-life pavements and pavement recycling with reclaimed asphalt pavement (RAP) are two important strategies for improving the sustainability of asphalt pavements. Epoxy asphalt, as a proven long-life pavement material, is attracting attention from the pavement community for its use in road pavements. The recyclability of epoxy asphalt mixtures, however, has never been studied and has now become one concern in promoting the use of epoxy asphalt in road pavements. This study attempts to explore the performance of hot mix asphalt (HMA) containing reclaimed epoxy asphalt materials. Reclaimed epoxy asphalt was fabricated in the laboratory and incorporated into regular asphalt mixtures at various contents. Specimens were prepared and tested for their performance in comparison with mixtures without RAP. It was found that replacing the coarse aggregates in HMA with epoxy RAP up to 80% did not negatively affect its Marshall stability, tensile strength, and moisture resistance. The plastic deformation at failure of HMA, however, may increase with the increase in epoxy RAP content. At the current stage, the results from this study do not provide evidence to invalidate the use of epoxy RAP in HMA, at least at a coarse aggregate replacement rate of less than 40%.
6
Liu, Yu Long, Ning Zhao, and Jin Zhao. "The Durability Analysis of Secondary Recycled Asphalt Mixture." Advanced Materials Research 557-559 (July 2012): 1497–500. http://dx.doi.org/10.4028/www.scientific.net/amr.557-559.1497.
Повний текст джерелаАнотація:
In order to solve the waste which is generated from the recycled asphalt pavement overhaul again, this paper puts forward the idea of secondary reclaimed asphalt mixture. Through analysis the performance index of secondary reclaimed asphalt mixture and with comparison the road performance of the asphalt mixture after different recycled times,we found that, as long as mixed with the right amount of regenerative agent,the road performance index of secondary recycled asphalt mixture can be recovered to the use standard. However, with the increasing of the asphalt aged times, the declining rate of road performances of reclaimed asphalt mixture are increasing.
7
Plewa, Andrzej, Marta Wasilewska, Władysław Gardziejczyk, and Paweł Gierasimiuk. "USE OF RECLAIMED ASPHALT PAVEMENT WITH MILLED ROAD PAVEMENT LAYERS." Inżynieria Ekologiczna 43 (2015): 55–61. http://dx.doi.org/10.12912/23920629/58903.
Повний текст джерела
8
Mousa, E., A. Azam, M. El-Shabrawy, and S. M. El-Badawy. "Laboratory characterization of reclaimed asphalt pavement for road construction in Egypt." Canadian Journal of Civil Engineering 44, no. 6 (June 2017): 417–25. http://dx.doi.org/10.1139/cjce-2016-0435.
Повний текст джерелаАнотація:
This paper presents the engineering characteristics of reclaimed asphalt pavement (RAP), blended with virgin aggregate for unbound base and subbase layers. The proportions of RAP were 0%, 20%, 60%, 80%, and 100% by total mass of the blend. The experimental laboratory testing included index properties such as gradation, modified Proctor compaction, California Bearing Ratio, and hydraulic conductivity. Repeated load resilient modulus testing was conducted on the blends. The impact of load duration on resilient modulus was also investigated. A strong inverse trend was found between resilient modulus and California Bearing Ratio. An accurate model was proposed for the prediction of the resilient modulus as a function of stress state and reclaimed asphalt pavement percentage with coefficient of determination of 0.94. Finally, multilayer elastic analysis of typical pavement sections with the base layer constructed of virgin aggregate and reclaimed asphalt pavement blends showed good performance.
9
Mamun, Abdullah Al, H. I. Al-Abdul Wahhab, and M. A. Dalhat. "Comparative Evaluation of Waste Cooking Oil and Waste Engine Oil Rejuvenated Asphalt Concrete Mixtures." Arabian Journal for Science and Engineering 45, no. 10 (April 22, 2020): 7987–97. http://dx.doi.org/10.1007/s13369-020-04523-5.
Повний текст джерелаАнотація:
Abstract In road construction, different types of waste oil have been recommended to overcome the stiffening effect of reclaimed asphalt pavement content. However, the selection of an effective rejuvenator based on a comparative study can lead to using the resources more efficiently. In this study, waste cooking oil and waste engine oil are used to rejuvenate three different percentages (30%, 40%, and 50%) of reclaimed asphalt pavement following the current maximum industrial adaptability. The waste oil rejuvenated mixtures are compared to the fresh mixture, and mixtures rejuvenated with commercial rejuvenator. The moisture sensitivity, indirect tensile strength, and resilient modulus of the various asphalt mixtures are analyzed. Based on the statistical analyses and overall ranking, it is concluded that 7% of waste engine oil performs better till 40% of reclaimed asphalt pavement, whereas 13% of waste cooking oil can be used till 50% of reclaimed asphalt pavement.
10
Xie, Jiawen, Wenke Huang, Bei Hu, Zhicheng Xiao, Hafiz Muhammad Zahid Hassan, and Kuanghuai Wu. "Study on the Road Performance of Foamed Warm-Mixed Reclaimed Semi-Flexible Asphalt Pavement Material." Materials 14, no. 18 (September 17, 2021): 5379. http://dx.doi.org/10.3390/ma14185379.
Повний текст джерелаАнотація:
Warm-mixed reclaimed asphalt pavement (RAP) technology has been widely studied worldwide as a recycled environmental method to reuse waste materials. However, the aggregate skeleton structure of the warm-mixed reclaimed asphalt mixture is not stable because of the existence of the recycled materials. Warm-mixed recycled semi-flexible pavement material can solve the defects of the above materials. In this study, five different types of open-graded asphalt mixtures containing different contents of RAP were designed, and relevant laboratory tests were conducted to assess the road performance of the warm-mixed recycled semi-flexible pavement material. The test results indicated that the road performance of warm-mixed reclaimed semi-flexible pavement materials has good resistance to rut deformation ability. Furthermore, the materials also had good water stability and fatigue performance. The grey correlation analysis shows that the asphalt binder content has the most significant correlation with the high-temperature stability, and the correlation between RAP content and the fatigue performance was the greatest. Furthermore, the curing age has the most remarkable with the low-temperature crack resistance of the warm-mixed reclaimed semi-flexible material.
11
Bańkowski, Wojciech, Dariusz Sybilski, Jan Król, Karol Kowalski, Piotr Radziszewski, and Piotr Skorek. "Use of reclaimed asphalt pavement – necessity and innovation." Budownictwo i Architektura 15, no. 1 (April 1, 2016): 157–67. http://dx.doi.org/10.24358/bud-arch_16_151_17.
Повний текст джерелаАнотація:
A responsible recycling of asphalt pavements is crucial in terms of economic and ecological measures related to preservation of non-renewable resources of bituminous binders and aggregates. Leading countries in road industry endeavour to maximise reclaimed asphalt pavement (RAP) application in production of new asphalt mixtures. Unfortunately, RAP re-using in Poland is limited and often results in construction works related to verge tabilization or construction of a subbase in mineral-cement-emulsion (MCE) technology. Application of RAP in asphalt mixture production, if happened, would be restricted to cold RAP addition in a limited amount only. The aforementioned situation is mostly related to lack of contractor’s experience, HMA plants not equipped with the necessary installation, agencies restrictions, tender conditions, problems with RAP homogeneity and others.This paper presents InnGA research project in which the main goal was to develop the asphalt mixtures with as high as possible RAP content without compromising mixture performance. Project and its dissemination should provide necessary know-how to road authorities, agencies, design offices and contractors.
12
Saleh, Alfian, Dapot Syaloom Harianja, and Fadrizal Lubis. "Analisis Nilai Keausan pada Lapis Hot Rolled Sheet (HRS) dengan Menggunakan Reclaimed Asphalt Pavement (RAP) dan Styrofoam." JURNAL TEKNIK 16, no. 1 (April 27, 2022): 36–40. http://dx.doi.org/10.31849/teknik.v16i1.9491.
Повний текст джерелаАнотація:
The application of recycling using Reclaimed Asphalt Pavement (RAP), where Reclaimed Asphalt Pavement (RAP) is a road structure rehabilitation concept, by optimizing the reuse of old materials into new pavement materials. In this study, materials from Reclaimed Asphalt Pavement were used for the Hot Rolled Sheet (HRS) layer by utilizing added material in the form of Styrofoam waste material. Styrofoam has the same properties as asphalt, namely thermoplastic which is one of the reasons it is used as an added material. From the results of the KAO test, it was made with a value variation of 6.2%; 6.7%; 7.2%; 7.7%; 8.2% and obtained the optimum asphalt content value of 7.24%. From the optimum asphalt content obtained, it is continued by searching for the optimum styrofoam content. The search for optimum styrofoam content was carried out using the addition of various values of 0%, 6%, 12%, 18%, 24% of the asphalt weight. Where all test results meet the 2018 Highways specifications with the highest stability value of 3,688.87 kg and optimum styrofoam content of 17.218%. After getting the optimum asphalt and styrofoam content, the cantabro test was carried out with an average weight loss value of 3.81%. The results of this study indicate that the use of Reclaimed Asphalt Pavement (RAP) material added with Styrofoam on the Hot Rolled Sheet pavement layer has a high resistance to wear and tear.
13
Du, Jia Chong, and Wan Chien Hung. "Green Road Using Reclaimed Asphalt Pavement for Sub-Base and Base Layers." Applied Mechanics and Materials 193-194 (August 2012): 184–87. http://dx.doi.org/10.4028/www.scientific.net/amm.193-194.184.
Повний текст джерелаАнотація:
Based on cost effectiveness, environmental impact, energy savings, and shortages of quality materials, reclaimed asphalt pavement (RAP) used for pavement construction does not only reduce aggregate need, but it also solves the problem of RAP disposal. Thus, the technology of cold mix recycling for pavement sub-base and base is introduced and tested in laboratory. The test results show that the recycled cold mix is a candidate material for pavement sub-base and base layer use. However, cold-mix emulsion asphalt used for recycling must be designed properly to ensure reliable performance. The unique features of recycled cold mixes are time temperature effects.
14
Garg, Navneet, and Marshall R. Thompson. "Lincoln Avenue Reclaimed Asphalt Pavement Base Project." Transportation Research Record: Journal of the Transportation Research Board 1547, no. 1 (January 1996): 89–95. http://dx.doi.org/10.1177/0361198196154700113.
Повний текст джерелаАнотація:
Pavement rehabilitation and reconstruction operations have generated large supplies of reclaimed asphalt concrete (RAC). In Illinois crushed RAC generally called recycled asphalt pavement (RAP) supplies are not 100 percent recycled into hot-mix asphalt concrete production. RAP acceptance as a pavement base material has been limited because of the lack of laboratory testing information, information on structural behavior, and field performance data. Limited preliminary laboratory testing and isolated commercial and local road agency paving experience in Illinois indicate that RAP has significant potential as a pavement base. RAP base potential was evaluated by constructing the Lincoln Avenue (Urbana, Illinois) demonstration project during late September and early October 1993. The pavement section is a 305-mm (12-in.) lime-modified, fine-grained subgrade, a 203-mm (8-in.) compacted RAP base, and a 76-mm (3-in.) dense-graded asphalt concrete surface course. The construction, structural response, and performance of the Lincoln Avenue RAP base project were monitored as part of a cooperative study (Illinois Department of Transportation, City of Urbana, and University of Illinois). The accumulated construction, field testing and evaluation, and laboratory testing data and information are summarized. The field construction experience, field control test data, laboratory testing results, falling weight deflectometer results, and Lincoln Avenue performance data indicate that RAP can successfully be used as a conventional flexible pavement base material. The performance of the Lincoln Avenue RAP base pavement (to date) is comparable with that of a crushed stone base.
15
Hayat, Umar, Abdur Rahim, Ammad Hassan Khan, and Zia Ur Rehman. "Use of Plastic Wastes and Reclaimed Asphalt for Sustainable Development." Baltic Journal of Road and Bridge Engineering 15, no. 2 (June 25, 2020): 182–96. http://dx.doi.org/10.7250/bjrbe.2020-15.479.
Повний текст джерелаАнотація:
The increased cost of virgin material, declining resources and increasing plastic wastes have turned the research momentum towards sustainable and green pavements. Reclaimed Asphalt Pavement (RAP) from the construction industry and plastic wastes disposal is the main problem for Pakistan as well as other developing countries in the face of fewer funds for the construction, repair, and rehabilitation of the extensive road network. In this research, the attempt has been made to study the use of Reclaimed Asphalt Pavement and plastic wastes to counter these issues. Virgin binder was modified with three different contents (2%, 4%, and 6%) of Polyethylene Terephthalate and three contents (20%, 30%, and 40%) of Reclaimed Asphalt Pavement. Conventional properties of the modified binder were determined by penetration and softening point. At the same time, thermal stability was checked by Thermal Gravimetric Analysis, and resistance against rutting was evaluated with the help of Dynamic Shear Rheometer. It is observed that modified binder remains stable up to a temperature of 470 °C and showed improved resistance against rutting. Marshall mix properties were determined and compared to specifications of the National Highway Authority of Pakistan. Optimum Marshall stability was observed with 4% Polyethylene Terephthalate, and 30% Reclaimed Asphalt Pavement, while flow and air voids remained in limits. As per the results, utilisation of plastic wastes in asphalt pavements enhances the performance and helps to reduce the environmental pollution and landfill problems due to Reclaimed Asphalt Pavement and plastic wastes.
16
Kowalski, Karol J., Wojciech Bańkowski, Jan B. Król, Birgitte Holt Andersen, Anastasija Komkova, and Raquel Casado Barrasa. "Practical Application of Sustainable Road Structure: Mechanical and Environmental Approach." Applied Sciences 12, no. 23 (November 22, 2022): 11914. http://dx.doi.org/10.3390/app122311914.
Повний текст джерелаАнотація:
The principles of the circular economy are the basic determinants of the sustainable development of road construction. This paper presents a field study with a new concept of asphalt pavement structure with ecologically oriented attributes, significantly reducing the asphalt pavement carbon footprint while achieving a level of long-term performance comparable or greater than that of conventional pavement structures. The sustainable pavement consists of the introduction of a BIO-additive that allows for the integration of higher percentage of reclaimed asphalt pavement (RAP) as an alternative to the traditional asphalt mixtures. In the sub-base the use of construction and demolition waste was adopted. The results were obtained from a full-sized test section of the road structure divided for reference and eco-innovative cases. Mechanistic analyses were performed for materials and pavement structure based on laboratory tests and on-site assessment. The new eco-design solution was subjected to a comprehensive LCA and LCCA analysis and summarised by SWOT assessment.
17
Zghibarcea, Ș., D. Ungureanu, N. Țăranu, D. Hoha, RA Polcovnicu, and TA Leizeriuc. "Cold in-place recycling of aged and deteriorated asphalt and concrete pavements." IOP Conference Series: Materials Science and Engineering 1182, no. 1 (October 1, 2021): 012084. http://dx.doi.org/10.1088/1757-899x/1182/1/012084.
Повний текст джерелаАнотація:
Abstract This study focuses on implementing two distinct recycling methods, the reclaimed asphalt pavement and the reclaimed concrete material, on classical road pavements, by totally replacing the surface or base courses with ones made with recovered materials. The majority of the road networks in the eastern European countries were built between 1950 and 1980 and are, nowadays, aged and degraded. Within this frame, the cold in-place recycling methods were developed, which can be applied to both asphalt and concrete pavements. During the cold in-place recycling process, the reclaimed asphalt or concrete materials do not leave the construction site at all, but they are processed on the spot and reused immediately. Thus, the material is granulated to the desired depth, mixed with the binding agent and water and then repaved and compacted in a new layer. One of the most significant benefits of the cold in-place recycling process is that the material is simultaneously recycled and mixed with the binding agent, enabling the road pavement to be strengthened without the need to import expensive virgin aggregates. This work describes the manufacturing technology and the equipment train used to cold recycle aged and deteriorated asphalt and concrete pavements.
18
Haq, Najeeb Ul. "Use of Reclaimed Asphalt Pavement (RAP) in Rigid Road Pavements." International Journal for Research in Applied Science and Engineering Technology 7, no. 10 (October 31, 2019): 157–59. http://dx.doi.org/10.22214/ijraset.2019.10026.
Повний текст джерела
19
Thanaya, I. Nyoman Arya, I. G. R. Purbanto, and I. M. S. J. Negara. "Study on the Properties of Sand Sheet Asphalt Mixture Using Old Road Pavement Milling and Asphalt Emulsion." Applied Mechanics and Materials 845 (July 2016): 385–93. http://dx.doi.org/10.4028/www.scientific.net/amm.845.385.
Повний текст джерелаАнотація:
This paper describes experiments on sand sheet (SS) asphalt mixture utilizing reclaimed asphalt pavement (RAP) from road milling of old road pavement. Natural aggregate was added to adjust the aggregate grading to closely meet specification. The mixture was bound with asphalt emulsion cationic rapid setting (CRS), type CRS-1. The SS mix was produced by hotmix procedure, compacted with 2x50 Marshall blows. Sand sheet asphalt mixture is dedicated for low to medium trafficked road pavement. The asphalt content of the RAP was extracted, and contained 5.29%. The performance of the SS mix was compared to asphalt concrete wearing course (AC-WC), using natural aggregate and 50pen asphalt, compacted at standard of 2x75 Marshall blows. At optimum asphalt content, the Marshall properties of both mixture met specification in Indonesia. The creep performance of both mixture was closely comparable, although the SS mix was compacted at lower compaction level. According to its dynamic creep slope, the SS mix is suitable for pavement with medium traffic load at temperature > 30 o or suitable for road with heavy traffic at temperature < 30 oC. The fatigue performance of SS mix was far better than the AC-WC mix, as the SS mix contain higher asphalt content and of finer aggregate grading.
20
Ge, Zhe Sheng, Xi Li, and Xiao Qian Hu. "Properties of Emulsification and Recycling of Reclaimed Asphalt Pavement in Room Temperature." Advanced Materials Research 446-449 (January 2012): 1984–88. http://dx.doi.org/10.4028/www.scientific.net/amr.446-449.1984.
Повний текст джерелаАнотація:
In the existing technology of cold asphalt pavement recycling, it is only the aggregate that is used again after the crushing and screening of the Reclaimed Asphalt Pavement (RAP), but the asphalt is discarded. So a lot of asphalt resource is wasted. The technology of emulsification and recycling of RAP in room temperature reuses the aged asphalt in the RAP thereby effectively reducing the quantity of newly added asphalt and also improving the performance of the mixture. The application of this technology will save a lot of valuable resources, reduce material costs and save project investments. The technology also contributes to the practice of “resource-saving and environmental-friendliness” in road construction.
21
Edeh, Joseph E., Manasseh Joel, and James Mzuaor Aburabul. "Groundnut Shell Ash Stabilized Reclaimed Asphalt Pavement, as Pavement Material." Advanced Materials Research 824 (September 2013): 3–11. http://dx.doi.org/10.4028/www.scientific.net/amr.824.3.
Повний текст джерелаАнотація:
Large volume of reclaimed asphalt pavements (RAP) aggregates are generated during pavement rehabilitation and reconstruction and disposed along road alignment while large quantities of groundnut shell ash (GSA) are generated from the combustion of groundnut shell and also disposed in large quantities on production sites. This paper presents results of the laboratory evaluation of the characteristics of GSA stabilized RAP with a view to determining its suitability for use as highway pavement material in flexible pavements construction. The RAP-GSA mixtures were subjected to British standard light (BSL) (standard Proctor) compactive effort to determine the compaction characteristics and California bearing ratio (CBR). Test results show that the properties of RAP improved with GSA treatment. The particle grading improved from 99.13% coarse aggregate and 0.87% fines, with AASHTO classification of A-1-b for 100% RAP and 9.08% coarse aggregate and 90.92% fines, with AASHTO classification of A-4 for 100% GSA to 15.6691.72% coarse aggregate and 8.2884.32% fines, with AASHTO classification in the range A-4 (silty soil) to A-1-a [granular material, for the various RAP-GSA mixes. Maximum dry density (MDD) decreased while the optimum moisture content (OMC) increased with higher GSA content in the RAP + GSA mixes. Optimum CBR values of 22.2% (unsoaked) and 18.3% (soaked) were recorded for 80% RAP + 20% GSA and 90% RAP + 10% GSA mixes, respectively. This optimum mixes satisfied durability requirement with insignificant water absorption and can be used as subgrade material in flexible pavements. This research provides the results to the evaluation of GSA stabilized RAP as highway construction material, as it is based on CBR determination. Further work may be encouraged to assess resilient modulus of this material under cyclic load.
22
Skotnicki, Lukasz, Jarosław Kuźniewski, and Antoni Szydlo. "Stiffness Identification of Foamed Asphalt Mixtures with Cement, Evaluated in Laboratory and In Situ in Road Pavements." Materials 13, no. 5 (March 3, 2020): 1128. http://dx.doi.org/10.3390/ma13051128.
Повний текст джерелаАнотація:
The article presents the possibilities of using foamed asphalt in the recycling process to produce the base layer of road pavement constructions in Polish conditions. Foamed asphalt was combined with reclaimed asphalt pavement (RAP) and hydraulic binder (cement). Foamed asphalt mixtures with cement (FAC) were made, based on these ingredients. To reduce stiffness and cracking in the base layer, foamed asphalt (FA) was additionally used in the analyzed mixes containing cement. The laboratory analyzes allowed to estimate the stiffness and fatigue durability of the conglomerate. In the experimental section, measurements of deflections are made, modules of pavement layers are calculated, and their fatigue durability is determined. As a result of the research, new fatigue criteria for FAC mixtures and correlation factors of stiffness modules and fatigue durability in situ with the results of laboratory tests are developed. It is anticipated that FAC recycling technology will provide durable and safe road pavements.
23
Mohi ud Din, Ishfaq, and Mohammad Shafi Mir. "Study of warm mix asphalt using reclaimed asphalt pavement and copper slag: a review." Canadian Journal of Civil Engineering 47, no. 4 (April 2020): 355–62. http://dx.doi.org/10.1139/cjce-2019-0093.
Повний текст джерелаАнотація:
The incorporation of copper slag (CS) in asphalt pavements proves to be a good substitute in replacing the natural aggregates. This reduces pavement construction cost and plays a key role in protecting the environment. The CS can be used with recycled asphalt pavement (RAP) material especially in warm mix asphalt pavements. The use of RAP not only leads to environmental benefits but also considerably saves natural resources and decreases the requirement to use virgin bitumen. The use of CS in pavement construction sector eliminates the disposal as well as leaching problems associated with it. This paper focuses on the review of studies carried out on the use of CS along with RAP in road construction. It presents and discusses the work done on the use of CS in the pavement construction sector and the use of RAP in providing the necessary stiffening effect to the asphalt pavements. It analyzes the requirement and advantage of using CS with RAP in asphalt pavements in light of previous research findings and its influence on various engineering properties in pavements. This paper also reviews the work done to study the environmental impact of using CS in asphalt mixes.
24
Gungat, Lillian, and Meor Othman Hamzah. "Green Road Construction Using Reclaimed Asphalt Pavement with Warm Mix Additive." International Journal on Advanced Science, Engineering and Information Technology 8, no. 2 (March 31, 2018): 426. http://dx.doi.org/10.18517/ijaseit.8.2.3479.
Повний текст джерела
25
Antunes, Vítor, José Neves, and Ana Cristina Freire. "Performance Assessment of Reclaimed Asphalt Pavement (RAP) in Road Surface Mixtures." Recycling 6, no. 2 (May 13, 2021): 32. http://dx.doi.org/10.3390/recycling6020032.
Повний текст джерелаАнотація:
Considerable amounts of Reclaimed Asphalt Pavement (RAP) are produced every year, as the road network requires maintenance to ensure the safety and comfort of its users. RAP is a 100% recyclable material and a useful fit to be re-introduced into another cycle without downgrading its functionality. Despite the current knowledge about the benefits associated with RAP use, it is not yet largely applied in several countries. This paper aims to validate, on the basis of both short- and long-term mechanical behaviours, the application of a bituminous mixture with a high RAP incorporation rate (75%) in road pavement wearing courses. A crude tall oil rejuvenator was used. Both short- and long-term oven ageing procedures were employed to simulate the ageing that occurs during mixture production and in-service life, respectively. The tests for validating the RAP mixture as an alternative solution comprised stiffness, resistance to fatigue, permanent deformation, and determination of the water sensitivity. Furthermore, the RAP bitumen mobilisation degree was evaluated and a mixing protocol was established. In comparison with virgin bituminous mixtures, it was found that, in general, the high RAP mixtures presented similar or better behaviour. The ageing process had a hardening effect namely in terms of stiffness and resistance to permanent deformation, without significant effects on the resistance to fatigue and water damage.
26
Taha, Ramzi, Galal Ali, Adnan Basma, and Omar Al-Turk. "Evaluation of Reclaimed Asphalt Pavement Aggregate in Road Bases and Subbases." Transportation Research Record: Journal of the Transportation Research Board 1652, no. 1 (January 1999): 264–69. http://dx.doi.org/10.3141/1652-33.
Повний текст джерела
27
Toth, Csaba, Laszlo Petho, Szabolcs Rosta, and Peter Primusz. "Performance assessment of full depth asphalt pavements manufactured with high recycled asphalt pavement content." Acta Technica Jaurinensis 16, no. 1 (February 22, 2023): 18–26. http://dx.doi.org/10.14513/actatechjaur.00688.
Повний текст джерелаАнотація:
Reclaimed asphalt pavement (RAP) is generated during road rehabilitation and resurfacing projects. This highly valuable recycled material should be used for manufacturing fresh hot mix asphalt (HMA) for new asphalt pavement layers to ensure the highest added value and minimise environmental impact. The use of RAP is already common practice worldwide; however, incorporating RAP into the manufacturing of HMA is still very minimal in Hungary. As part of a research work HMA containing 20-50% RAP was designed, manufactured and tested. This paper discusses the performance tests carried out on laboratory and plant mixed asphalt mixes; using this data the overall full depth asphalt (FDA) pavement performance was predicted through general mechanistic pavement design. The outcomes of this paper showed that high RAP content asphalt mixes can have superior performance; this disproves the common perception that high RAP mixes are substandard road construction materials. The analysis performed in this paper found that asphalt mixes with high RAP content present low risk for in-situ performance. However, in order to achieve this outcome, the application of correct mix design methodology, appropriate RAP management and suitable asphalt plant capability for mass production are paramount.
28
Chen, Jian-Shiuh, Han-Chang Ho, and Yen-Yu Lin. "Production, Construction, Properties, and Performance of a Test Road with High Reclaimed Asphalt Pavement Content." Transportation Research Record: Journal of the Transportation Research Board 2633, no. 1 (January 2017): 37–45. http://dx.doi.org/10.3141/2633-06.
Повний текст джерелаАнотація:
The two primary factors that drive the use of reclaimed asphalt pavement (RAP) are economic savings and environmental benefits. However, highway agencies are concerned about the use of a high percentage of RAP in asphalt pavements. This study addressed issues related to the production, construction, properties, and performance of asphalt pavements that contain high percentages of RAP. Mixtures that contained up to 40% RAP were successfully designed, produced, and constructed after proper procedures were followed and attention to detail was paid during design, production, and construction. A separate drum for drying and heating RAP, called a parallel heating system, was used to produce high RAP content asphalt mixtures in a batch plant. Rejuvenating agents were mixed directly in a surge bin to allow the rejuvenator enough time to diffuse into aged RAP binder. Comprehensive laboratory tests were performed to evaluate the air voids, the resilient modulus, the rut depth, and the Cantabro weight loss of asphalt mixtures with high RAP content. A test road was constructed in 2014 to monitor how high RAP asphalt pavements would perform under real traffic and environmental conditions. An in-depth investigation was conducted of pavement performance, including cracking, friction, and rutting. The engineering properties of plant-produced mixtures and field cores were well correlated with the pavement performance of the test road. Test results indicated that high RAP content asphalt mixtures could perform as satisfactorily as those produced with virgin materials to meet in-service requirements.
29
Buczyński, Przemysław, Juraj Šrámek, and Grzegorz Mazurek. "The Influence of Recycled Materials on Cold Mix with Foamed Bitumen Properties." Materials 16, no. 3 (January 31, 2023): 1208. http://dx.doi.org/10.3390/ma16031208.
Повний текст джерелаАнотація:
The utilization of recycled materials is an important issue in the context of environmental protection. The large amounts of recycled material recovered from the demolition of asphalt road structures indicate the need to find new ways of utilizing them. In the case of road renovation projects, large amounts of recycled materials are, in most cases, recovered in the form of reclaimed asphalt pavement (RAP), reclaimed concrete (RC) and recycled aggregate (RA). To focus on the effects of the use of recovered materials (RAP, RC and RA), the same composition was used for all of the analyzed mixtures in terms of foamed bitumen (FB) and Portland cement (CEM) content. The scope of laboratory tests included the specification of the following parameters: the amount of air void content Vm, the determination of axial compression strength at +25 °C, indirect tensile strength (ITS) at +25 °C, water resistance, TSR, water and frost resistance, WRW+M stiffness modulus (IT-CY) at 13 °C, dynamic dynamicmodulus. The plan of the experiment assumed addition recycled material in quantities between 20% and 80% in increments of 20%. The obtained results indicate that both the type and quantity of recycled material significantly affect the properties of the cold-recycled mixture with foamed bitumen. Using reclaimed asphalt pavement and recycled cement concrete guarantees high levels of stiffness in the recycled mixture. Howeverin the case of recycled aggregate, the authors did not observe any visible changes in the dynamicdynamic modulus, irrespective of the loading conditions. It was also indicated that it is necessary to reduce the quantity of reclaimed asphalt pavement in the composition of the FB-RCM mix to maintain the required air void content.
30
Vaitkus, Audrius, Judita Gražulytė, Andrius Baltrušaitis, Jurgita Židanavičiūtė, and Donatas Čygas. "Long-Term Performance of Pavement Structures with Cold In-Place Recycled Base Course." Baltic Journal of Road and Bridge Engineering 16, no. 2 (June 21, 2021): 48–65. http://dx.doi.org/10.7250/bjrbe.2021-16.523.
Повний текст джерелаАнотація:
Properly designed and maintained asphalt pavements operate for ten to twenty-five years and have to be rehabilitated after that period. Cold in-place recycling has priority over all other rehabilitation methods since it is done without preheating and transportation of reclaimed asphalt pavement. Multiple researches on the performance of cold recycled mixtures have been done; however, it is unclear how the entire pavement structure (cold recycled asphalt pavement overlaid with asphalt mixture) performs depending on binding agents. The main objective of this research was to evaluate the performance of cold in-place recycled asphalt pavements considering binding agents (foamed bitumen in combination with cement or only cement) and figure out which binder leads to the best pavement performance. Three road sections rehabilitated in 2000, 2003, and 2005 were analysed. The performance of the entire pavement structure was evaluated in terms of the International Roughness Index, rut depth, and pavement surface distress in 2013 and 2017.
31
Aeron, P., and P. Aggarwal. "Effect of aging on reclaimed asphalt pavement and rejuvenators." IOP Conference Series: Materials Science and Engineering 1248, no. 1 (July 1, 2022): 012099. http://dx.doi.org/10.1088/1757-899x/1248/1/012099.
Повний текст джерелаАнотація:
Abstract Reclaimed Asphalt Pavement (RAP) material primarily consists of extracted asphalt concretes from the existing road infrastructure. It comprises 2 major non-renewable resources, i.e., aggregates and bituminous binder and their conscious use can ensure the sustainability of bituminous pavement construction. In this study, more focus is given to the asphalt binder, which is extracted from RAP. It has been tried to replace more and more new virgin binders with recycled RAP binders. But to counteract the higher stiffness of the RAP binder, it is rejuvenated to achieve strength higher or equivalent to the target binder. To have confidence in the efficacy of the RAP binder and rejuvenator in unaged and aged conditions, different combinations of blends are made and tested in aged as well as unaged conditions. In this study, Two RAP sources with and without virgin binder are rejuvenated with two rejuvenators. Physio-rheological tastings are done on each same. Based on achieved results aging index of all the blends is found. These results authenticate the aging properties of RAP binder as well as rejuvenators.
32
Qiao, Yaning, Eshan Dave, Tony Parry, Omar Valle, Lingyun Mi, Guodong Ni, Zhenmin Yuan, and Yuefeng Zhu. "Life Cycle Costs Analysis of Reclaimed Asphalt Pavement (RAP) Under Future Climate." Sustainability 11, no. 19 (September 30, 2019): 5414. http://dx.doi.org/10.3390/su11195414.
Повний текст джерелаАнотація:
Reclaimed asphalt pavement (RAP) has received wide application in asphalt pavement construction and maintenance and it has shown cost-effectiveness over virgin hot mix asphalt (HMA). HMA with a high content of reclaimed asphalt (RA) (e.g., 40%) is sometimes used in practice, however, it may have significant adverse effects on the life cycle performance and related costs. In particular, challenges may arise as the life cycle performance of RAP is also affected by local climatic conditions. Thus, it is important to investigate whether it is still economic to use RAP under future local climate, with consideration of life cycle performance. A case study was conducted for various road structures on Interstate 95 (I-95) in New Hampshire (NH), USA for the investigation. The case study utilized dynamic modulus testing results for local virgin HMA and HMA with 40% RA (as major material alternatives) to predict life cycle performance of the selected pavement structures, considering downscaled future climates. Then, a life cycle cost analysis (LCCA) was considered to estimate and compare the life cycle cash flow of the investigated road structures. Responsive maintenance (overlay) and effectiveness were also considered in this study. It was found that using 40% RA in HMA can reduce agency costs by up to approximately 18% under the 2020–2040 predicted climate and NH should consider this practice under predicted future climate to reduce agency costs.
33
Sejvani, Ajaykumar, A. A. Amin, and L. B. Zala. "Utilization of Reclaimed Asphalt Pavement Material in Wet Mix Macadam (W.M.M)." Journal of Physics: Conference Series 2089, no. 1 (November 1, 2021): 012060. http://dx.doi.org/10.1088/1742-6596/2089/1/012060.
Повний текст джерелаАнотація:
Abstract Reclaimed asphalt pavement (RAP) is one of the innovative and effective technologies in many places in the world. The utilization of RAP is rapidly increasing popularity and becoming an emerging technique in India. As per IRC-120:2015, removing or reprocessing pavement materials containing aggregates that are bitumen coated is termed as RAP. These materials are gained through a process in which the existing surface pavement is reclaimed and reused after processing for reconstruction, resurfacing, or repaving. Well graded and high-quality aggregate are achieved from this process. Proper utilization of RAP with specified properties and specified percentages, not only serve as an alternative useful pavement material but also helps in reducing the usage of natural construction material, that will directly reduce the overall cost of projects. By conducting tests as per MoRTH specifications (5th Revision), the various characteristics of RAP material and fresh aggregates are observed. The main objective of the study is to carry out the performance tests: Modified Proctor test on fresh material as well as on material mixed with reclaimed asphalt pavement i.e. 10%, 20%, and 30% of total mix and to achieve optimum moisture content and maximum dry density by using Modified Proctor Test. Attempts are carried out to design a new pavement using Indian Road Congress (I.R.C-37:2018) guidelines and utilization of RAP material. Economic benefits are calculated in terms of fresh and RAP (10%, 20%, and 30%) mix material pavement.
34
Soares, Roberto, Rielle Haichert, Diana Podborochynski, and Curtis Berthelot. "Modeling in Situ Performance of Cement-Stabilized Granular Base Layers of Urban Roads." Transportation Research Record: Journal of the Transportation Research Board 2363, no. 1 (January 2013): 88–95. http://dx.doi.org/10.3141/2363-10.
Повний текст джерелаАнотація:
This study used a three-dimensional nonlinear orthotropic computational road model to measure the performance of reclaimed and recycled portland cement concrete (PCC) aggregates and reclaimed asphalt pavement (RAP) aggregates stabilized with cement as a base layer in a typical local road structure in the city of Saskatoon, Saskatchewan, Canada. The pavement structure was composed of 45-mm hot-mix asphalt concrete on a 225-mm granular base built directly over an in situ subgrade. The cross section was analyzed with a conventional granular base layer as a baseline and PCC and RAP base layers with 2% cement stabilization. The cement-stabilized PCC and RAP base layers showed improved shear strain and horizontal strain behavior when compared with the conventional granular base layer (which was not cement stabilized). This improvement con-firmed that cement stabilization of reclaimed PCC and RAP materials provided an enhanced primary response. This study demonstrated that typical thin Saskatoon pavement structures were highly dependent on the constitutive properties of base layer material. Stabilizing the PCC and RAP base layers with 2% cement reduced the maximum shear strains at the edge of the pavement structure by 12% and 25%, respectively, compared with the unstabilized conventional granular base layer. It was believed that the increased fracture and cohesion of the residual cementitious materials inherent to recycled granular base, as well as the cementitious binder added, improved structural performance.
35
Anthonissen, Joke, Wim Van den bergh, and Johan Braet. "Reuse of bituminous pavements: A mini-review of research, regulations and modelling." Waste Management & Research: The Journal for a Sustainable Circular Economy 35, no. 4 (December 5, 2016): 357–66. http://dx.doi.org/10.1177/0734242x16678064.
Повний текст джерелаАнотація:
Bituminous pavement can be recycled – even multiple times – by reusing it in new bituminous mixtures. If the mechanical properties of the binder get worse, this reclaimed asphalt is often used in the sub-structure of the road. Apparently, up till now, no end-of-life phase exists for the material. Actually, defining the end-of-life and the end-of-waste stage of a material is important for life cycle assessment modelling. Various standards and scientific studies on modelling life cycle assessment are known, but the crucial stages are not yet defined for reclaimed asphalt pavement. Unlike for iron, steel and aluminium scrap, at this moment, no legislative end-of-waste criteria for aggregates are formulated by the European Commission. More research is necessary in order to develop valuable end-of-life criteria for aggregates. This contribution is a mini-review article of the current regulations, standards and studies concerning end-of-life and end-of-waste of reclaimed asphalt pavement. The existing methodology in order to define end-of-waste criteria, a case study on aggregates and the argumentation used in finished legislative criteria are the basis to clarify some modelling issues for reclaimed asphalt material. Hence, this contribution elucidates the assignment of process environmental impacts to a life cycle stage as defined by EN15804, that is, end-of-life stage (C) and the supplementary information Module D with benefits and loads beyond the system boundary.
36
Andhika Putra, Thopan, Bambang Sugeng Subagio, and Eri Susanto Hariyadi. "Performance Analysis of Resilient Modulus and Fatigue Resistance of AC-BC Mixture with Full Extracted Asbuton and Reclaimed Asphalt Pavement (RAP)." Jurnal Teknik Sipil 28, no. 3 (December 26, 2021): 349–58. http://dx.doi.org/10.5614/jts.2021.28.3.12.
Повний текст джерелаАнотація:
Abstract One way to be developed to overcome challenges in providing flexible pavement materials is to apply the green roads principle by reusing some or all of the old road pavement material or Reclaimed Asphalt Pavement (RAP) as a material for new road pavement, which if reused will affect the performance of the mixture, such as decreasing the level of durability and premature pavement damage, so an effort must be made to improve the performance of the recycled material, namely by adding full extracted Asbuton and rejuvenating materials. The RAP material was obtained from scratching the asphalt of the Jagorawi Toll Road. The mixture used was asphalt concrete-binder course (AC-BC) layer using 30%, 40%, and 50% RAP material, using full extracted Asbuton at 6%, and Nichireki rejuvenating material. Then, on mixtures with RAP material, Marshall Test, Resilient Modulus test with UMATTA, and resistance to fatigue with four points loading test with strain control were conducted. The use of RAP material with modified asphalt in the form of an addition of full extracted Asbuton into the Pen 60/70 Asphalt can increase the asphalt stiffness. Marshall test results showed that a mixture with 6% full extracted asbuton content and 0% RAP material content (A6RAP0) gave the highest stability value. The results of the Resilient Modulus test showed that the mixture with 6% full extracted asbuton content and 50% RAP material content (A6RAP50) gave a high Resilient Modulus value at a test temperature of 45oC. The results of the fatigue resistance test showed that the mixture with 6% full extracted asbuton content and 50% RAP material content (A6RAP50) at a strain level of 300 µε gave the longest fatigue life. Keywords: Reclaimed asphalt pavement (RAP), full extracted asbuton, asphalt concrete -binder course, modified asphalt, resilient modulus, fatigue life. Abstrak Salah satu cara dikembangkan untuk mengatasi tantangan dalam penyediaan material perkerasan lentur adalah menerapkan prinsip greenroads dengan memanfaatkan kembali sebagian atau keseluruhan material perkerasan jalan lama atau Reclaimed Asphalt Pavement (RAP) sebagai material untuk perkerasan jalan yang baru, dimana jika digunakan kembali akan mempengaruhi kinerja dari campuran seperti penurunan tingkat durabilitas dan kerusakan dini perkerasan, sehingga harus dilakukan suatu upaya untuk memperbaiki kinerja dari material daur ulang tersebut, yaitu dengan penambahan Asbuton murni dan bahan peremaja. Material RAP didapatkan dari hasil garukan aspal Jalan Tol Jagorawi. Campuran yang dipakai adalah Laston Lapis AC-BC menggunakan kadar material RAP sebanyak 30%, 40%, dan 50%, dengan penggunaan Asbuton murni sebesar 6%, serta bahan peremaja Nichireki, dan kemudian selanjutnya pada campuran dengan penggunaan material RAP dilakukan pengujian Marshall, Modulus Resilien dengan alat UMATTA dan ketahanan terhadap kelelahan (fatigue) metode four points loading test dengan kontrol regangan. Penggunaan material RAP dengan aspal modifkasi berupa penambahan Asbuton murni kedalam Aspal Shell Pen 60/70 dapat meningkatkan kekakuan aspal. Hasil pengujian Marshall menunjukkan campuran dengan kadar Asbuton murni 6% dan kadar material RAP 0% (A6RAP0) memberikan nilai stabilitas tertinggi. Hasil pengujian Modulus Resilien menunjukkan campuran campuran dengan kadar Asbuton murni 6% dan kadar material RAP 50% (A6RAP50) memberikan nilai Modulus Resilien yang tinggi pada temperatur pengujian 45oC. Hasil pengujian ketahanan terhadap kelelahan menunjukkan campuran dengan kadar Asbuton murni 6% dan kadar material RAP 50% (A6RAP50) pada regangan 300 µε memberikan umur kelelahan yang paling panjang. Kata-kata kunci: Reclaimed asphalt pavement (RAP), Asbuton murni, laston lapis antara, aspal modifikasi, modulus resilien, umur kelelahan.
37
Oktopianto, Yogi, and Dwi Wahyu Hidayat. "Analisis Efisiensi Penggunaan Teknologi Aspal Daur Ulang Pada Jalan Tol Elevated Ir. Wiyoto Wiyono." Borneo Engineering : Jurnal Teknik Sipil 4, no. 2 (December 31, 2020): 172–79. http://dx.doi.org/10.35334/be.v4i2.1587.
Повний текст джерелаАнотація:
The use of recycling technologies to the principles of green roads should get priority. Reclaimed Asphalt Pavement (RAP) has not been used properly is a problem in this study. Hotmix Recycling is a recycling technique that can be applied to road pavement rehabilitation and maintenance. The research was conducted to determine the cost-efficiency of recycled asphalt. The method used in this research is to analyze the unit price of conventional asphalt maintenance and to analyze the unit price of recycled asphalt in order to find out how much efficiency is obtained of asphalt pavement recycled. The results showed that the cost of conventional asphalt is Rp.1,160,000 per ton and the price of recycled asphalt is Rp.915,000 per ton, there is a savings of Rp. 245,000 per ton, The use of recycled asphalt technology in the periodic asphalt of the Ir. Wiyoto Wiyono toll roads can save operational and maintenance costs of Rp. 3,013,500,000.00
38
Plati, Christina, Maria Tsakoumaki, and Konstantinos Gkyrtis. "Physical and Mechanical Properties of Reclaimed Asphalt Pavement (RAP) Incorporated into Unbound Pavement Layers." Applied Sciences 13, no. 1 (December 27, 2022): 362. http://dx.doi.org/10.3390/app13010362.
Повний текст джерелаАнотація:
Against the backdrop of global warming and depletion of natural resources, new techniques and alternative materials need to be explored and integrated into road construction. Reclaimed Asphalt Pavement (RAP) is one of the waste materials that can be reused in new road projects if its behavior is better understood. Numerous researchers have studied the use of RAP in both bound and unbound pavement layers. However, the mechanical behavior and deformation characteristics of RAP in unbound pavement layers are not fully understood due to its unique properties. For this reason, this paper aims to investigate the performance of RAP in the construction of unbound pavement layers (base and subbase). The methodology used consists of two phases: (i) laboratory tests in terms of physical properties, bearing capacity and permanent deformations generated and (ii) a comparative analysis of the test results. For the laboratory tests, the RAP material was taken from the milling operation of a pavement section to be rehabilitated and blended with virgin aggregates (VA) in different proportions. In addition, a sample consisting of pure VA was used as a reference sample for the comparative analysis of the results. Overall, it is concluded that the use of RAP for admixture in unbound layers is feasible and meets the sustainability requirements of pavement materials and structures without compromising pavement strength. A highlight of the research findings is that RAP with percentages up to 40% is a rational approach for the development of RAP-VA mixes to be incorporated into unbound pavement layers. Nevertheless, the results of the present study support the statement that testing is required each time to define the capabilities of RAP considering local effects and material conditions.
39
Moon, Ki Hoon, and Augusto Cannone Falchetto. "Double-Recycled Reclaimed Asphalt Pavement: A Laboratory Investigation at Low Temperatures Based on Different Mathematical Approaches." Materials 13, no. 13 (July 7, 2020): 3032. http://dx.doi.org/10.3390/ma13133032.
Повний текст джерелаАнотація:
Using recyclable materials in asphalt pavement is a fundamental design approach not only for limiting the environmental impact of the construction industry, but also for reducing the overall costs of the road infrastructures. Over the past years, road agencies have developed different policies to incorporate various types of recyclable material into conventional asphalt mixtures. reclaimed asphalt pavement (RAP) is one of the most highly recycled construction materials. However, the aged RAP binder and its stiffer and brittle characteristics compared to the fresh binder may negatively affect the performance of the recycled mixture, especially when operating in cold climates. In this study, the low-temperature response of asphalt mixture prepared with single-recycled RAP (SRRAP) and double-recycled RAP (DRRAP), prepared in the laboratory, is experimentally investigated based on creep testing performed with the bending beam rheometer (BBR). Then, the data were analyzed based on three simple mathematical models to extract information on material behavior. Finally, a new indicator named thermal stress factor (TFS) on low-temperature response is proposed. Relatively poorer performance was observed from SRRAP mixture compared to the asphalt mixture prepared with virgin material. However, the low-temperature response between SRRAP and DRRAP did not present significant differences. The values of TFS support the experimental results and suggest the possibility of considering re-recycling technology for further research with the objective of a possible application in the asphalt pavement industry.
40
Nicuţă, Alina Mihaela. "Featuring Reclaimed Asphalt Pavement Integration in Warm Mix Asphalt towards Roads Sustainable Development." Advanced Materials Research 649 (January 2013): 242–45. http://dx.doi.org/10.4028/www.scientific.net/amr.649.242.
Повний текст джерелаАнотація:
The evaluation of energy savings in the area of transport infrastructure entails a complex characterization of factors, attitudes and consequences. In the frame of energy saving approach, must be identified sustainable alternatives and solutions for road asphalt pavements production and exploitation. Finding innovative materials is one major objective in this process. In the present paper has been carried out an evaluation of the energetically and environmental benefits of warm mix asphalt (WMA) compositions that incorporate reclaimed asphalt pavement (RAP) and their contribution to roads sustainable development. For a proper analysis and reliable results, have been used the Life Cycle Assessment methodology and asPECT software. WMA integrating RAP are known as energy – saving and environmentally friendly asphalt roads pavements. Analyzed in a comparative perspective with hot mix asphalt (HMA) incorporating RAP, WMA would gain in results due to the decrease in mixing and compaction temperature, energy consumption and emissions but also to the increase in durability, quality and performance. The results of this comparison intended to point out an alternative that would provide an increase in the sustainability of the transport infrastructure sector.
41
Taha, Ramzi, Ali Al-Harthy, Khalid Al-Shamsi, and Muamer Al-Zubeidi. "Cement Stabilization of Reclaimed Asphalt Pavement Aggregate for Road Bases and Subbases." Journal of Materials in Civil Engineering 14, no. 3 (June 2002): 239–45. http://dx.doi.org/10.1061/(asce)0899-1561(2002)14:3(239).
Повний текст джерела
42
Pradyumna, T. Anil, Abhishek Mittal, and P. K. Jain. "Characterization of Reclaimed Asphalt Pavement (RAP) for Use in Bituminous Road Construction." Procedia - Social and Behavioral Sciences 104 (December 2013): 1149–57. http://dx.doi.org/10.1016/j.sbspro.2013.11.211.
Повний текст джерела
43
Kukiełka, Jerzy, Wojciech Bańkowski, and Krzysztof Mirski. "Asphalt-Cement Concretes with Reclaimed Asphalt Pavement and Rubber Powder from Recycled Tire." Materials 14, no. 9 (May 6, 2021): 2412. http://dx.doi.org/10.3390/ma14092412.
Повний текст джерелаАнотація:
The goal of the work was to describe properties of asphalt-cement concrete (ACC) with reclaimed asphalt pavement (RAP), Portland cement, sand, and rubber powder (RP), as a material to base courses of road pavements. The mixtures were designed with the RAP in the amount of 75, 80, and 85% (m/m) and chosen cement-sand-rubber (CSR) mortar. Three CSR mortars were composed with cement CEM 42.5 R in the amount 29% (m/m); washed sand 0/2 mm in the amount 29, 35, or 41%; rubber powder of granulation 0/1 mm in the amount of 18, 24, or 29% (m/m); and water in the amount 12% fulfilled w/c = 0.4. The optimum moisture content of the selected ACC with CSR mortar determined in the modified Proctor compaction test was approximately 6% and maximum dry density 2.000 g/cm3. Laboratory tests of indirect tensile strength, stiffness modulus (IT-CY and 4PB-PR), water resistance, fatigue life, and complex modulus (E*) at different temperatures were conducted and analyzed. The test results are presented, among others, in the form: the isotherm of complex modulus, Black curve, the master curve, and the Cole-Cole plot.
44
Zariņš, Atis. "Case Study on the Effect of Recycled Asphalt Layer Parameters on the Bearing Capacity of the Pavement." Baltic Journal of Road and Bridge Engineering 15, no. 5 (December 23, 2020): 45–58. http://dx.doi.org/10.7250/bjrbe.2020-15.506.
Повний текст джерелаАнотація:
Numerous ways to use recycled asphalt (RA) in the road base course will provide both environmental and economic benefits, allowing to recycle and utilise this initially waste material in road or pavement reconstruction projects. However, the properties and parameters of RA necessary for the application of reclaimed asphalt pavement (RAP) in a new pavement structure in most cases are not detectable in the design stage, which complicates design and construction process. The purpose of this paper is to study possibilities for evaluating the performance and parameters of RA, as well as to review the possibilities, methods and applications for RA testing. Data for this case study were obtained from recently completed road structures in the form of FWD measurements, together with lab explored parameters of drilled pavement cores. Based on that data, the relationships between the main pavement structural parameters, such as modulus on the surface of the pavement, compressive strength of RA core segment, thickness of bound layers and back calculated modulus were examined. On the way to exploring different analytical approaches, two approximation models were developed and compared, using the obtained data: by directly approximating the obtained data and after processing them with artificial neural network (ANN).
45
Bilema, Munder, Mohamad Yusri Aman, Norhidayah Abdul Hassan, Zubair Ahmed Memon, Hend Ali Omar, Nur Izzi Md Yusoff, and Abdalrhman Milad. "Mechanical Performance of Reclaimed Asphalt Pavement Modified with Waste Frying Oil and Crumb Rubber." Materials 14, no. 11 (May 24, 2021): 2781. http://dx.doi.org/10.3390/ma14112781.
Повний текст джерелаАнотація:
Researchers are exploring the utilisation of reclaimed asphalt pavement (RAP) as a recycled material to determine the performance of non-renewable natural aggregates and other road products such as asphalt binder, in the construction and rehabilitation stage of asphalt pavements. The addition of RAP in asphalt mixtures is a complex process and there is a need to understand the design of the asphalt mixture. Some of the problems associated with adding RAP to asphalt mixtures are moisture damage and cracking damage caused by poor adhesion between the aggregates and asphalt binder. There is a need to add rejuvenators to the recycled mixture containing RAP to enhance its performance, excepting the rutting resistance. This study sought to improve asphalt mixture performance and mechanism by adding waste frying oil (WFO) and crumb rubber (CR) to 25 and 40% of the RAP content. Moreover, the utilisation of CR and WFO improved pavement sustainability and rutting performance. In addition, this study prepared five asphalt mixture samples and compared their stiffness, moisture damage and rutting resistance with the virgin asphalt. The results showed enhanced stiffness and rutting resistance of the RAP but lower moisture resistance. The addition of WFO and CR restored the RAP properties and produced rutting resistance, moisture damage and stiffness, which were comparable to the virgin asphalt mixture. All waste and virgin materials produce homogeneous asphalt mixtures, which influence the asphalt mixture performance. The addition of a high amount of WFO and a small amount of CR enhanced pavement sustainability and rutting performance.
46
Mantalovas, Konstantinos, and Gaetano Di Mino. "The Sustainability of Reclaimed Asphalt as a Resource for Road Pavement Management through a Circular Economic Model." Sustainability 11, no. 8 (April 13, 2019): 2234. http://dx.doi.org/10.3390/su11082234.
Повний текст джерелаАнотація:
The transition of the road engineering industry to a circular way of doing business requires more efficient and sustainable resources, energy, and waste management. The rates in which reclaimed asphalt is being recycled or reused in the asphalt mixture production process constitutes a crucial parameter in this transition. This paper aims at establishing a further step towards the combined circularity and sustainability of asphalt pavements, by introducing a framework for quantifying their Material Circularity Index. The framework is based on the methodology proposed by the Ellen MacArthur Foundation and accordingly tailored for the context of asphalt pavements. This study, thus, attempts to provide a thorough analysis of the Reclaimed Asphalt’s recycling rates and trends on a European scale and to identify whether the efficiency of the current recycling practices is adequate or not. Moreover, a case study has been undertaken in order to quantify the Material Circularity index of the asphalt pavements forming Italy’s motorway network, following the proposed framework. For representative and accuracy reasons, the Material Circularity index of wearing, binder, and base courses has been calculated separately, and the results interestingly indicate that the base course exhibits the highest rates of circularity.
47
Siverio Lima, Mayara S., Mohsen Hajibabaei, Sina Hesarkazzazi, Robert Sitzenfrei, Alexander Buttgereit, Cesar Queiroz, Viktors Haritonovs, and Florian Gschösser. "Determining the Environmental Potentials of Urban Pavements by Applying the Cradle-to-Cradle LCA Approach for a Road Network of a Midscale German City." Sustainability 13, no. 22 (November 12, 2021): 12487. http://dx.doi.org/10.3390/su132212487.
Повний текст джерелаАнотація:
This study used a cradle-to-cradle Life Cycle Assessment (LCA) approach to evaluate the environmental potentials of urban pavements. For this purpose, the urban road network of the City of Münster (Germany) was selected as the case study, and comprehensive data for several phases were collected. The entire road network is composed of flexible pavements designed according to specific traffic loads and consists of main roads (MRs), main access roads (MARs), and residential roads (RSDTs). Asphalt materials, pavement structures, and maintenance strategies are predefined for each type of road and are referred to as “traditional” herein. Some pavement structures have two possible maintenance strategies, denoted by “A” and “B”, with distinguished periods of intervention. To evaluate the impact of using recycled materials, we considered alternative pavement structures composed of asphalt materials containing a greater amount of reclaimed asphalt pavement (RAP). The study was carried out considering analysis periods of 20, 50, 80, and 100 years and using two indicators: non-renewable cumulative energy demand (nr-CED) and global warming potential (GWP). The results show that the use of higher amounts of RAP can mitigate negative environmental impacts and that certain structures and maintenance strategies potentially enhance the environmental performance of road pavements. This article suggests initiatives that will facilitate the decision-making process of city administrators to achieve more sustainable road pavement constructions and provides an essential dataset inventory to support future environmental assessment studies, particularly for European cities.
48
Sedthayutthaphong, Nathanyawat, Peerapong Jitsangiam, Hamid Nikraz, Suriyavut Pra-ai, Sarintip Tantanee, and Korakod Nusit. "The Influence of a Field-Aged Asphalt Binder and Aggregates on the Skid Resistance of Recycled Hot Mix Asphalt." Sustainability 13, no. 19 (October 1, 2021): 10938. http://dx.doi.org/10.3390/su131910938.
Повний текст джерелаАнотація:
The application of asphalt hot mix recycling is one challenge in sustainable road pavement research. In addition to the vast amount of research on the performance of recycled asphalt–concrete, the research on the frictional resistance of recycled hot mix asphalt is still limited. The effects of aged asphalt and aged aggregates on the skid resistance of recycled hot mix asphalt were investigated in this research. The aged asphalt and aged aggregates were carefully extracted from the field-reclaimed asphalt pavement, and the engineering and mechanical properties of aged and virgin aggregates were measured. The degradation of recycled hot mix asphalt was simulated using an accelerated polishing machine to mimic road surface abrasion. Accordingly, the initial and final skid resistances of the recycled hot mix asphalt were determined and correlated with the properties of the aged asphalt and aggregates. The initial skid resistance of recycled hot mix asphalt decreased with reductions in penetration and ductility of the blended asphalt. However, the changes in the blended asphalt properties contributed only small variations to the final skid resistances of the recycled hot mix asphalt. The gradations of recycled hot mix asphalt correlated only with the final skid resistances. The aggregate gradations controlled the characteristics of the final skid resistance since the covered binder was partially polished off from the road surface at this stage.
49
Pomoni, Maria, Christina Plati, and Andreas Loizos. "How Can Sustainable Materials in Road Construction Contribute to Vehicles’ Braking?" Vehicles 2, no. 1 (January 17, 2020): 55–74. http://dx.doi.org/10.3390/vehicles2010004.
Повний текст джерелаАнотація:
Vehicles’ braking is a key factor towards safer driving. In particular, tyre–pavement friction is connected with both industry and infrastructure requirements in terms of tyre characteristics and frictional properties of pavement surfaces respectively that both contribute to safe braking. For this reason, tyre–pavement friction is considered as one of the most pressing emergencies in roadway assets in order to reduce skidding related accidents. At the same time, sustainability aspects have been raised in modern infrastructure engineering. Hence, an issue is introduced on how sustainable materials used for pavement construction may contribute to tyre–pavement and consequently vehicles’ braking. For this reason, a laboratory process is developed to investigate the frictional properties of several utilized in pavement wearing courses including both traditional and sustainable materials (reacted activated rubber—RAR and reclaimed asphalt pavement—RAP). Environmental conditions (seasonal temperature changes, rainfall effect and contamination caused by dust formation) are simulated in the laboratory and vehicles’ braking is investigated using the British Pendulum Tester (BPT). Results provide a good explanation for the vehicles’ braking ability under the investigated conditions for both traditional and sustainable materials. Ultimately, it is proved that asphalt mixture types with RAR modifier or RAP material exhibit a satisfactory performance towards providing a safe road surface for the moving vehicles.
50
Chen, Shih-Huang, Deng-Fong Lin, Huan-Lin Luo, and Zi-Yang Lin. "Application of reclaimed basic oxygen furnace slag asphalt pavement in road base aggregate." Construction and Building Materials 157 (December 2017): 647–53. http://dx.doi.org/10.1016/j.conbuildmat.2017.09.136.
Повний текст джерела