Готові списки джерел за темами / Crushed Additives

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Добірка наукової літератури з теми "Crushed Additives"

Автор: Grafiati

Опубліковано: 10 грудня 2022

Оновлено: 29 січня 2023

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Статті в журналах з теми "Crushed Additives"

Yastremskiy, D. "RESEARCH OF BITUMINOUS BINDER WITH STABILIZING ADDITIVES BY INFRARED SPECTROSCOPY AND X-RAY SPECTRAL ANALYSIS." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 5, no. 11 (December 4, 2020): 24–31. http://dx.doi.org/10.34031/2071-7318-2020-5-11-24-31.

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Increasing the volume of crushed stone-mastic asphalt concrete used in the upper layers of road surfaces requires the development of effective stabilizing additives that ensure the uniformity of the asphalt mixture during short-term storage and transportation, as well as improving the properties of asphalt concrete. This additives include a complex stabilizing additive of the following composition: 90 % cellulose fibers from waste paper, 5 % rubber powder, 5 % viscous petroleum bitumen of the BND 90/130 brand. This article presents the results of a study of bitumen with the addition of "Viatop 66" and a complex cellulose-containing stabilizing additive (CSD). Using Fourier-transform spectroscopy, graphical data are obtained. as a result of their analysis, it is found that the interaction of stabilizing additives for crushed-mastic asphalt concrete with bitumen leads to the appearance of additional absorption bands characteristic of aromatic compounds (CH, benzene ring), sulfur-containing functional groups S=O st, R-SO-R, R-SO-OH, R-SO2-R, C=S st, as well as for C-O-H groups. X-ray spectral analysis confirmed the presence of additional sulfur-containing spectra in the composition of stabilizing additives. It is found that depending on the chemical composition of the stabilizing additives, the physical and mechanical characteristics of the bituminous binder and the resulting asphalt concrete change.

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SHCHEPOCHKINA, J. A. "MODIFICATION OF FINE-GRAINED CONCRETE ADDITIVES CRUSHED PLASTIC." Building and reconstruction 89, no. 3 (2020): 131–36. http://dx.doi.org/10.33979/2073-7416-2020-89-3-131-136.

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Khafizova, E. N., I. F. Panchenko, and D. A. Panchenko. "Use of rock crushing technological wastes for cement concrete compositions." Russian Automobile and Highway Industry Journal 18, no. 6 (January 17, 2022): 790–99. http://dx.doi.org/10.26518/2071-7296-2021-18-6-790-799.

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Introduction. the article deals with the issues of the use of technological waste generated during rocks crushing.Materials and Methods. In the research the rock crushing screenings from the Rezhevsky crushed rock plant and dolomite screenings from the Satkinsky crushed rock plant were used. The data on the physical-mechanical properties of crushing waste is presented, as well as a study of dusty rock cuttings made with a Fritsch Analysette 22 laser particle size analyser. The structure of concrete was analyzed by JEOL JSM-6510 electron microscope.Results. The studying results of heavy weight cement concretes of classes B22.5 - B40 with crushed stone are presented in the article. To control the properties of concrete an MC-PowerFlow 3100 hyperplasticizer additive and an air-entraining additive Centrament Air 202 were used. The phase composition of the contact zone between the cement stone and the aggregate - granite screening has been investigated.Conclusion. compositions of heavy concrete have been developed with the use of crushed stone screenings and chemical additives to regulate concrete properties. A pilot batch of reinforced concrete products was produced at the Rotor reinforced concrete plant in Vinzili, Tyumen Region.

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Trautvain, A. I., V. V. Yadykina, and S. S. Tobolenko. "Study of the Influence of Thin-Dispersed Powders on the Structuring Ability of Stabilizing Additives." Materials Science Forum 974 (December 2019): 37–42. http://dx.doi.org/10.4028/www.scientific.net/msf.974.37.

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The article presents the results of the study of the bitumen-retaining ability of stabilizing additives developed on the basis of cellulose-paper waste and finely dispersed fillers of various genesis. Analysis of the test results of crushed stone-mastic asphalt mixtures of the same composition showed that all additives provide the value of the runoff index of the organic binder in the mixture, which meets the requirement of the State Educational Standard No. 31015-2002. The introduction of mineral fillers into the stabilizer contributes to a decrease in the studied parameter, which is due to the additional structuring effect. For a two-component additive (without mineral filler), the studied indicator has the greatest value, exceeding the recommended limit. It is important to note that the use of mineral powder in the composition of stabilizing additives has a positive effect on the flow of the binder. Mineral powder, due to the structuring effect on bitumen and the formation of a microporous structure, reduces the run-off rate of the binder. This is due to the fact that bitumen, being in thin interlayers and small pores, falls into the region of influence of the molecules of the surface layer of the mineral part, increasing the density of granules and facilitating the granulation process of the additive. The minimum runoff of the organic binder is observed in the preparation of crushed stone-mastic asphalt-concrete mix with additives based on mechanically activated wastes of wet magnetic separation of ferruginous quartzites and is 0.07.

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Kroviakov, S. O., A. O. Chystiakov, А. О. Bershadskyi, and T. Shevchenko. "CONCRETES ON SECONDARY CRUSHED STONE AS A PROMISING MATERIAL FOR THE RIGID PAVEMENT BASE." Bulletin of Odessa State Academy of Civil Engineering and Architecture, no. 87 (June 3, 2022): 85–91. http://dx.doi.org/10.31650/2415-377x-2022-87-85-91.

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In the course of research, the efficiency of application of plasticizers of different type in concretes for bases of highways on secondary crushed stone is defined. In studies of concrete compositions, the type of crushed stone, secondary or granite, changed, which allowed to compare the properties of concrete on secondary crushed stone with the properties of concrete of similar composition on granite crushed stone. In addition, the type of sand changed: Bilyaevsky or Voznesenski quarry. As modifiers used additive lignosulfonate or superplasticizer polycarboxylate type MC-PowerFlow 3200. All concrete mixtures had equal mobility P2, which was provided by variation W/C (water-cement ratio). It was found that the concrete on the secondary crushed stone is characterized by a significantly higher W/C mixture due to greater porosity and damage to the surface of the coarse aggregate. The average density of concrete on secondary crushed stone is 4.2-4.4% lower compared to the average density of concrete on granite crushed stone. The average density of concrete on the larger sand of the Voznesenski quarry is 25-30 kg/m3 higher than the average density of concrete on similar gravel and finer sand of the Bilyaevsky quarry. In composites based on CEM III/A and using lingosulfonate additives, the compressive strength of concrete on secondary crushed stone is 12-13% lower compared to the strength of concrete on granite crushed stone and similar sand. However, when using the more efficient MC-PowerFlow 3200 additive, the difference in concrete strength on secondary and granite crushed stone is only 5.4% (29.8 MPa and 31.4 MPa, respectively). The strength of concrete on the sand of the Voznesenski quarry is 4-6% higher than the strength of concrete on similar gravel and finer sand of the Bilyaevsky quarry. It was found that the tensile strength when bending concrete on secondary and granite gravel when using the additive MC-PowerFlow 3200 was 2.75 MPa and 2.87 MPa, respectively, which differs by only 4%. Thus, the tensile strength of bending concrete on secondary crushed stone was almost no different from the tensile strength of similar concrete on granite crushed stone. This can be explained by the peculiarities of the aggregate with a porous surface, which is characterized by high adhesion to the cement-sand matrix. In general, the strength of concrete on secondary crushed stone using slag-containing cements allows them to be used effectively for road bases.

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KAMISHIMA, Hiroshi, Satoshi FUKUOKA, and Ryukichi MATSUO. "Utilization of Crushed FRP for Bulk Molding Compound Additives." Journal of the Society of Materials Science, Japan 44, no. 497 (1995): 149–52. http://dx.doi.org/10.2472/jsms.44.149.

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Theodoridou, M., E. Charalambous, P. Maravelaki-Kalaitzaki, and I. Ioannou. "Amelioration of crushed brick - lime composites using nano-additives." Cement and Concrete Composites 68 (April 2016): 77–87. http://dx.doi.org/10.1016/j.cemconcomp.2016.02.009.

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Fomina, Natalya, Irina Pavlova, and Maria Kochergina. "Industrial Waste as Components of Building Materials." E3S Web of Conferences 222 (2020): 04002. http://dx.doi.org/10.1051/e3sconf/202022204002.

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The possibilities of using large-tonnage waste from the Saratov region in the production of building materials are analysed. Waste was investigated: phosphogypsum - waste from the production of mineral fertilizers; steel-making slag, limestone crushing waste, construction waste (crushed concrete). The extraction of strontium and rare-earth metals from phosphogypsum is substantiated, followed by its processing into products that solidify according to the non-hydration principle, or use in the compositions of expanding cements. The development of geopolymer binders of alkaline activation based on steel-making slags is proposed. The introduction of low water demand carbonate cements into construction practice has been substantiated. Limestone crushing waste can be used as a carbonate mineral additive. The processing of crushed concrete waste into crushed stone, coarse sands and finely dispersed additives into cement concretes is considered. Technologies for processing large-tonnage waste in the production of building materials are environmentally sound and economically justified.

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Yastremsky, D. A., T. N. Abaydullina, and A. I. Kudyakov. "CRUSHED-STONE AND MASTIC ASPHALT WITH CELLULOSE CONTAINING ADDITIVE." Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture 21, no. 5 (October 29, 2019): 180–91. http://dx.doi.org/10.31675/1607-1859-2019-21-5-180-191.

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High-quality and durable asphalt pavement ensures safe and comfortable traffic, optimal logistics costs, territory attractiveness to construction investments, and industrial development. With constantly increasing loads on road pavements, it is necessary to improve the asphalt quality by introducing additives into the mixture, design methodology, scientific justification for the selection and preparation of raw materials. The paper proposes the development algorithm of crushed-stone and mastic asphalt modified by the new stabilizing additive, which consists of 90 % of cellulose fiber from waste paper, 5 % rubber powder, and 5 % bitumen. The optimal particle size distribution of the mineral component in the crushed-stone and mastic asphalt is considered to be 73% of crushed stone with fractions of 15–20, 10–15 and 5–10 mm, 16 % of dolomite sand from crushing screenings, 11 % of mineral powder, 0.4 % of stabilizing additive and 5.5 % of bitumen. The compressive strength of the developed composition is 2.3 times higher than that meeting the requirements of GOST 31015–2002 for the climatic zone II. The research results are confirmed by pilot-industrial tests in constructing the road pavement in Tyumen.

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Mudrychenko, Anatolii, Ivan Balashov, and Sergey Illyasch. "USE OF ACRYLIC COPOLYMER ADDITIVE SOIL STABILIZATION PLUS FOR PREPARATION OF MIXTURES MADE BY COLD RESYCLING TECHNOLOGY AND CRUSHED STONE-SAND MIXTURES IN PAVEMENT FOUNDATION LAYERS." Dorogi i mosti 2021, no. 24 (October 1, 2021): 48–59. http://dx.doi.org/10.36100/dorogimosti2021.24.048.

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ntroduction. Rehabilitation of public roads network requires a comprehensive recovery with strengthening of the bearing capacity of the pavement foundation. Rehabilitation of the foundation bearing capacity performed by arranging layers of road material made by cold recycling technology (hereinafter — CRRM) in accordance with [4] or by arranging a layer of crushed stone — sand mixture reinforced with cement or complex binder (hereinafter — CSSM 20) according to [13]. Purpose. The purpose of the work is to study the feasibility of using acrylic additives for the preparation of mixtures made by cold recycling technology and crushed stone-sand mixtures treated with cement in the layers of pavement foundation. Materials and methods. Experimental comparative tests of CRRM and CSSM 20 with different content of complex binder were performed. Results. Feasibility of acrylic additives use has been established (hereinafter — the additive) for the preparation of CRRM and CSSM 20 in the pavement foundation layers. Recommendations on technological parameters of preparation, transportation, laying and compaction of mentioned mixtures are given. Conclusions. Performed researches have shown that according to physical and mechanical indicators CRRM and CSSM20 meet the requirements of the current normative documents of Ukraine. The advantages of use are noted.

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Більше джерел

Дисертації з теми "Crushed Additives"

Wojtowicz, Maria. "Macro composites for crushing - additive manufacturing of hard phase : Development and testing of macro composites for crushing purposes." Thesis, Uppsala universitet, Tillämpad materialvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-447459.

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During this master thesis a crushing material composite was developed in order to determine if a specific design consisting of a pointy hard phase with a ductile phase in between can reduce the load needed to crush stone and therefor decrease the energy consumption during stone crushing. The steel hard phase (ASP 2012) was printed using an additive manufacturing method called selective laser melting (SLM). A process parameter optimization was performed in order to achieve a dense material and a pre-heated building platform was used to prevent cracking. The hard phase designs were printed and then filled with bronze (JM3 and JM7). The composites and steel references were tested by placing a stone on each sample and applying pressure until the stone broke. After the tests, the loads and the deterioration of the samples was analyzed. The results showed that it was possible to print the hard phase, but some defects like micro cracking were hard to eliminate entirely. Several methods were tested to cast the bronze but the most suitable during this project was melting of the bronze in an induction furnace with vacuum atmosphere. The results from the crushing simulations showed that there was a small difference between the references and the developed macro composites. The composites began to crush stones at lower loads than the references. Nevertheless, due to a large dispersion of the results a statistical difference could not be established.

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HEINDL, Jakub. "Úprava krmné dávky pro nosnice za účelem zlepšení pevnosti a tvrdosti skořápek vajec." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-174645.

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This major thesis expands the issue of the bachelor thesis "The issue of raising laying hens considering on introduction of enriched cages" and adds new knowledge relating to the topic feed rations and their influence on the final production. The theoretical part of the thesis analyses the basic theoretical concepts cohering with this topic, focused on creating a comprehensive overview of the structure and quality of the eggs, the basic ingredients in the feed rations, qualitative parameters of grapes as the modified additive provided by us and last but not least there is processed the recent overview of the current state of large-scale farmers in the Czech republic. The practical part of the thesis aims to test the effect of the proposed feed with an additive in the form of the crushed grape seeds, on the strength of the eggshell, by homogeneous samples of the breeds through from us proposed measuring instrument. Subsequently, a statistical evaluation of measured results is realized. In conclusion, the consideration is extended to the economic evaluation of costs and profits in case of the implementation of the suggested feed ration into practice in order to quantify the difference compared to the commonly used feed ration.

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Книги з теми "Crushed Additives"

Thomas, George L., P.E., Texas. Dept. of Transportation. Materials and Tests Division., and Texas. Dept. of Transportation. Office of Research and Technology Transfer., eds. A demonstration of stone matrix asphalt mix designs using high polish value crushed stone. [Austin, Tex: Texas Dept. of Transportation, Research and Technology Transfer Section, 1996.

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The poison squad: One chemist's single-minded crusade for food safety at the turn of the twentieth century. 2018.

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Частини книг з теми "Crushed Additives"

Vdovin, Evgenii, Lenar Mavliev, and Nikita Konovalov. "Modification by Zeolite-Containing Additive the Road-Building Materials Based on Carbonate Crushed Stone-Sand Mixtures and Cements." In Lecture Notes in Civil Engineering, 308–17. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80103-8_33.

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Freedgood, Elaine. "Paratext." In Worlds Enough, 77–98. Princeton University Press, 2019. http://dx.doi.org/10.23943/princeton/9780691193304.003.0004.

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This chapter focuses on paratext that is typically considered extradiegetic, and as such it is often experienced as optional. Readers can say that they have read Middlemarch without reading every single epigraph; they can certainly ignore footnotes at will, especially if they were written by an actual editor. Indeed, fictional paratexts may be more powerful than scholarly ones. Autographic notes are perhaps more significant for most literary readers than are allographic additions. The chapter also consider paratexts—both epigraphs and footnotes—in Middlemarch, Catherine Parr Traill's The Canadian Crusoes, Rudyard Kipling's Kim, and José Rizal's Noli Me Tangere as a way to examine bibliographic metalepsis: the infinite library that lurks in the margins of the text, and sometimes breaks through them because of the force of an allusion, the impact of information, or the oddness of bits of text attached but also detachable from the “main” text we read.

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Тези доповідей конференцій з теми "Crushed Additives"

Buczynski, Przemysław, and Marek Iwanski. "The Influence of Hydrated Lime, Portland Cement and Cement Dust on Rheological Properties of Recycled Cold Mixes with Foamed Bitumen." In Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.135.

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This article presents a laboratory evaluation of the viscoelastic properties of recycled base courses produced with different fillers. The aim of this study was to investigate the influence of loading time and temperature on the complex modulus (E*) and the phase angle (6) of recycled base courses with respect to selected additives used. The mixtures contained reclaimed asphalt pavement RAP, crushed stone from existing base courses and virgin aggregate. Foamed bitumen 50/70 at 2.5% was used as a binder. The hydraulic binder constituted 3.0% of the recycled base course mixture. Portland cement, hydrated lime and cement kiln dust CKD were added as fillers. Evaluation of rheological properties of recycled base courses according to selected additives was carried out to the procedure set out in EN 12697-26 annex D. The evaluation of stiffness modulus was conducted in the direct tension- compression test on cylindrical samples (DTC-CY). The samples were subjected to the cycles of sinusoidal strain with an amplitude Bo &amp;lt; 25μB. All tests were performed over a range of temperatures (5 ºC, 13 ºC, 25 ºC, 40 ºC) and loading times (0.1 Hz, 0.3 Hz, 1 Hz, 3 Hz, 10 Hz, 20 Hz). The results were used to model stiffness modulus master curves of the recycled base courses containing selected additives in the hydraulic binder.

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Puentes Mojica, Javier, Jose Luis Calvo, and M. Cruz Alonso Alonso. "Diseño de mezclas de hormigones autocompactantes con alto contenido de adiciones minerales y áridos de diferentes naturaleza para desempeño en ambientes altamente agresivos." In HAC2018 - V Congreso Iberoamericano de Hormigón Autocompactable y Hormigones Especiales. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/hac2018.2018.6324.

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The advances in the use of self-compacting concrete (SCC) increases its consumption in construction materials. The SCC has ease of placement and refinement of the microstructure due to the increase of the volume of paste and fines thus improving the resistance to the penetration of aggressive agents. Therefore, its use is not limited to usual scenarios but focusing also to environments with severe operating conditions as is the case of energy transport infrastructures, often located in remote and extreme places. These conditions of application and location restrict the type of materials to be used in the design of concrete: type of aggregates, type of cement, use of supplementary cementitious materials (SCM), etc. The development of SCC also must imply an increase in the sustainability of the construction process by promoting the use of binders with mineral additions and limestone filler , in order to reduce the total cement content (due to the reduction of CO2 emissions associated to cement production) thus decreasing their environmental footprint. However, the incorporation of SCM implies the need to ensure compatibility with the chemical additives, superplasticizers, while maintaining the fresh state properties. Another relevant factor is the type and characteristics of aggregates that significantly affect the workability of concrete. The aggregates provide an improvement in performance in a hardened state, but in some cases they modify the consistency losing the self-compactibility of the concrete.The aim of this study is to evaluate the influence of the composition of the mixture components on the fresh and hardened properties of the SCC: 1) Interaction of the additives with cements with high mineral addition content (50%) of slag and fly ash; 2) the effect of the use of mixtures of aggregates with different origin, shape and composition that provide the special properties required concentrated solar power plants. Mixtures of aggregates, limestone, basalt and crushed Clinker have been considered along with additives that promote flowability, water reducers and density enhancement. Robust SCCs can be developed with high stability suitable for CSP application.DOI: http://dx.doi.org/10.4995/HAC2018.2018.6324

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Sattarova, Z., R. Safin, and D. Prosvirnikov. "TECHNOLOGY OF PRODUCING COMPOSITE PAVERS OF CONTINUOUS ACTION." In Modern machines, equipment and IT solutions for industrial complex: theory and practice. FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov, 2021. http://dx.doi.org/10.34220/mmeitsic2021_124-129.

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Rational use of natural resources, and the involvement of wood waste generated in the logging and wood processing industry in the production of new products useful for society and the economy, is an urgent task of modern production. The use of wood flour of various fractions does not allow the most complete binding of the polymer to wood particles, since the cellulose polymer has a high polarity. This problem can be solved by soft contact thermal modification, as a result of which there is an increase in strength indicators and a decrease in the degree of water absorption. Thermomodification leads to a decrease in the hydroxyl groups of cellulose, which contributes to an increase in the binding with the polymer, its deeper penetration into the pores of the modified crushed wood particles. The paper presents a technology that allows to obtain composite paving stones from thermally modified flour, thermoplastic polymers with chemical additives and modifiers, continuous action.

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Grosse, Karl-Heinz, Milan Hrovat, Richard Seemann, and Robert Feher. "Improvement of Nuclear Grade Graphite Based on Isotropic and Highly Crystalline Natural Graphite by Generation of Silicon- or Zirconium-Carbide in Situ." In Fourth International Topical Meeting on High Temperature Reactor Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/htr2008-58026.

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Following the fabrication technique originally developed for HTR-molded block fuel elements a process was introduced to fabricate nuclear graphite with the aim to attain the improved irradiation stability above 3 × 1022n/cm2, E > 0,1 MeV and to increase corrosion resistance. Nuclear highly crystalline natural graphite is used. A phenol formaldehyde resin with additives of silicon or zirconium oxide powder serves as binder. The mixture thus obtained is isostatically consolidated into spheres and spheres are crushed to granules from which the 0.3 – 3 mm fraction is obtained. The granulate is hot molded into graphite bodies. The green bodies are heated to about 800 °C to carbonise the resin and subsequently annealed at 1900°C in vacuum. The key feature of the proposed process is based on the chemical affinity of binder coke with the structure obtained by carbonisation of green bodies. Consequently it reacts selectively in situ with the added SiO2, or ZrO2to carbides in vacuum at 1900°C. Silicon carbides and zirconium carbides are characterised by high mechanical strength and very good resistance to corrosion. The properties of reactor graphite, such as density, mechanical properties and in particular stability to fast neutron irradiation are considerably improved.

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Chen, Jin-Hong, Stacey M. Althaus, J. David Broyles, and Mohammed Boudjatit. "An Optimized NMR-Based Workflow for Accurate Porosity and Density Measurement of Drill Cuttings." In 2022 SPWLA 63rd Annual Symposium. Society of Petrophysicists and Well Log Analysts, 2022. http://dx.doi.org/10.30632/spwla-2022-0066.

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The majority of petrophysical data has been gained from downhole logging and laboratory core measurement. Drill cuttings are easily available for all drilled wells and can provide reservoir data throughout all phases of field development. They can also provide continuous petrophysical measurements for both vertical and horizontal wells. Many different rock properties can be extracted from drill cuttings; however, quantitative petrophysical measurements from source rock drill cuttings remain a challenge. This paper presents an optimized NMR-based workflow to measure the porosities and densities of drill cuttings from unconventional source rock reservoirs. The workflow includes sample cleaning, particle size selection, saturation, NMR, and mass measurements. We will also discuss some inherent problems in petrophysical measurement of drill cuttings generated by the PDC drill bit. In this workflow, the first crucial step in obtaining quantitative data from drill cuttings is to clean the cuttings of mud contamination. We found that simultaneous ultrasonic bathing and shaking of the samples in a mesh basket submerged in diesel was very efficient to remove drilling mud additives. The process also automatically sieved to select the desired particle size for analysis, which was essential for accurate results. The sonication process saturated the drill cuttings to a certain degree. Further saturation was carried out using pressure. Saturated samples were then subjected to a series of mass and NMR measurements. For unconventional source rocks, NMR allows for separation of liquid signals from inside and outside the drill cutting particles. In combination with mass measurements, both in air and in diesel, the NMR technique provided accurate porosity and density data of the drill cuttings samples. The workflow measured porosity and density of real drill cuttings and crushed particulate samples. The results on crushed samples were in good agreement with other accepted lab techniques. Measurement errors on drill cuttings generated by the PDC drill bits were investigated. The workflow was applied to drill cuttings from a horizontal source rock well. The measured porosity from the cuttings changes significantly along the measured depth of the tested horizontal well, indicating that the studied horizontal well was drilled through a very heterogeneous formation. The result is consistent with the large formation heterogeneity measured on acquired whole cores from the same reservoir.

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Akhtyamov, E. R., I. N. Kruchinin, and E. I. Kruchinina. "FEATURES OF ASPHALT COVERING DESIGNFOREST ROADS IN THE NORTHERN AND OF THE POLARURALS." In Modern machines, equipment and IT solutions for industrial complex: theory and practice. Voronezh State University of Forestry and Technologies named after G.F. Morozov, Voronezh, Russia, 2021. http://dx.doi.org/10.34220/mmeitsic2021_23-28.

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The main tasks of improving the crushed stone-mastic coatings of forest timber highways through the use of innovative road-building materials are considered. Such roads are characterized by the use of materials capable of meeting the basic requirements for transport and operational conditions in difficult natural and climatic conditions. The known road building materials are distinguished by the instability of their physical and mechanical properties. This causes significant difficulties both in the design and in the operation of forest timber roads made of these materials. Despite the complex of experimental studies carried out, the task of developing road coatings with adjustable performance properties remains unfulfilled. Thus, the developed method of designing the grain composition of crushed stone-mastic asphalt concrete pavements of forest roads, with new transport and operational parameters, taking into account the operating conditions, which determined the purpose of this work, will help to solve the problem. The aim of the research was to develop methods for creating crushed-night-mastic asphalt concrete pavements of forest timber roads, using a heat stabilizing additive from expanded vermiculite sand. In this work, the problem of assessing the degree of influence of the addition of sand from expanded vermiculite on the quality indicators of crushed stone-mastic asphalt concrete coatings of forest timber roads was solved. The results of the work were the creation of a formulation of crushed stone-mastic asphalt concrete with a heat-stabilizing additive from expanded vermulite of fraction from 0.5 to 1.0 mm. Taking into account the sufficient adequacy of experimental research, the results of the selection of the mixture can be recommended for use in the practice of building forest timber roads for I and II road-climatic zones.

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Yakovlev, Grigory, Anastasiya Gordina, Vladimir Khritankov, Vadim Khozin, Arina Shaybadullina, Damir Khazeev, Irina Bazhenova, Anna Ivakina, Zarina Saidova, and Alexander Repin. "Gypsum composition with siltstone-based mineral modifier." In The 13th international scientific conference “Modern Building Materials, Structures and Techniques”. Vilnius Gediminas Technical University, 2019. http://dx.doi.org/10.3846/mbmst.2019.041.

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The paper presents the results of studies of the structure and properties of the gypsum composition comprising 3% of crushed siltstone, a metamorphic rock. The structure and physicochemical properties of siltstone were studied, which predetermine its usage as a structuring additive in gypsum compositions. Adding crushed siltstone to the composition of a gypsum binder is shown to cause the compaction of the structure of the gypsum matrix due to changes in the morphology of crystalline hydrates of calcium sulfate and monolithic structure in general, and, consequently, the enhanced mechanical characteristics of the gypsum composition. Using scanning electron microscopy, differential thermography, and IR spectral analysis explain the change in the physicomechanical properties of the gypsum binder.

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Jarearnsiri, Thanatip, Sideth Prum, Thattep Wattanaphrayapa, Gerard Duggan, and Nalinee Jumnongpol. "A Study of Polymer Additive in Crushed Rock Soil Aggregate Improvement for Highway Construction in Suphan Buri." In International Conference on Civil, Structural and Transportation Engineering. Avestia Publishing, 2018. http://dx.doi.org/10.11159/iccste18.139.

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Avelar, T. C., A. F. Veiga, E. Gueguen, and J. R. Oliveira. "Recycling practices of crushed MgO-C bricks and dolomite sinter fines used as a slag conditioning additive in the EAF." In WASTE MANAGEMENT 2012. Southampton, UK: WIT Press, 2012. http://dx.doi.org/10.2495/wm120241.

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Blatchford, M. T., M. Jones, A. J. Horlock, D. G. McCartney, P. H. Shipway, and J. V. Wood. "Improvements in HVOF Sprayed Cermet Coatings Produced from SHS Powders." In ITSC2001, edited by Christopher C. Berndt, Khiam A. Khor, and Erich F. Lugscheider. ASM International, 2001. http://dx.doi.org/10.31399/asm.cp.itsc2001p0221.

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Abstract It has been shown that high velocity oxy-fuel (HVOF) thermal spray coatings with good wear resistance can be produced from Ni(Cr)-TiC powders manufactured by self-propagating high temperature synthesis (SHS) reactions. In the present work the process was expanded to include additions of Mo and W with the objective of modifying the carbide phase in an attempt to increase the wear resistance further. The effect of changing the matrix, i.e. substituting Fe for Ni, and changing the ceramic phase from TiC to TiB2 was also examined. The feedstock powder and resultant coatings are characterised in terms of x-ray diffraction analysis and scanning electron microscopy while the coating properties are measured by microhardness and dry sand rubber wheel (DSRW) abrasive wear testing. The results show that Fe(Cr)-TiB2 and Ni(Cr)-(W, Ti)C coatings have wear rates comparable to that of conventional Cr3C2-NiCr coatings produced from sintered and crushed powder, but further improvements are needed to achieve the wear resistance of WC-Co coatings.

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