Laboratory and Field Investigation of the Feasibility of Crumb Rubber Waste Application to Improve the Flexibility of Anti-Rutting Performance of Asphalt Pavement

Li, Hongyin; Jiang, Hailong; Zhang, Wenwu; Liu, Peng; Wang, Shanshan; Wang, Fei; Zhang, Jizhe; Yao, Zhenqiang

doi:10.3390/ma11091738

Cited by 21 publications

(8 citation statements)

References 26 publications

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“…This excessive accumulation threatens both environmental and human health [ 5 , 6 ]. However, the increasing volume of discarded rubber tires has garnered interest in developing new methods for reusing these materials [ 7 , 8 , 9 ], and thus motivated researchers to characterize the general geotechnical properties of sand–rubber mixtures [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Shear Modulus and Damping Ratio of Sand–Rubber Mixtures under Large Strain Range

Cui

Shan

et al. 2020

Materials

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Adding rubber into sands has been found to improve the mechanical behavior of sands, including their dynamic properties. However, ambiguous and even contradictory results have been reported regarding the dynamic behavior of sand–rubber mixtures, particularly in terms of the damping ratio. A series of cyclic triaxial tests were, therefore, performed under a large range of shear strains on sand–rubber mixtures with varying rubber volume contents, rubber particle sizes, and confining pressures. The results indicate the dynamic shear modulus decreases with increasing rubber volume content and with decreasing particle size and confining pressure. The relationship of the damping ratio to the evaluated parameters is complicated and strain-dependent; at shear strains less than a critical value, the damping ratio increases with increasing rubber volume content, whereas the opposite trend is observed at greater shear strains. Furthermore, sand–rubber mixtures with different rubber particle sizes exceed the damping ratio of pure sand at different rubber volume contents. A new empirical model to predict the maximum shear moduli of mixtures with various rubber volume contents, rubber particle sizes, and confining pressures is accordingly proposed. This study provides a reference for the design of sand–rubber mixtures in engineering applications.

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Section: Introductionmentioning

confidence: 99%

Dynamic Shear Modulus and Damping Ratio of Sand–Rubber Mixtures under Large Strain Range

Cui

Shan

et al. 2020

Materials

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“…erefore, new environment-friendly pavement materials are being studied. To remedy the issue of the hightemperature stability of asphalt pavement, measures, such as the optimization of gradation [1,2], addition of fiber [3], and addition of an antirutting agent [4,5], have been adopted to improve the high-temperature stability of the asphalt mixture. Further, a pavement cooling coating or thermal resistive aggregate can be used to reduce the temperature of asphalt pavements in hot weather [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of an Active Cooling Antirutting Asphalt Mixture

Shuan

Li²,

Xu³

et al. 2020

Advances in Materials Science and Engineering

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To reduce the temperature of asphalt pavements in summer and improve their high-temperature stability, tourmaline anion powder (TAP) was used as a modifier to prepare modified asphalt, which actively cools the pavement. The effects of different TAP contents on the high- and low-temperature performance of modified asphalt and its pavement cooling performance were studied based on the dynamic shear rheometer, low-temperature bending beam rheometer, and indoor rutting plate temperature difference tests; subsequently, the optimum TAP content was determined. Modified asphalt was used to prepare an active cooling antirutting asphalt mixture, and its pavement cooling performance was verified via outdoor lighting tests. High- and low-temperature dynamic modulus and low-temperature semicircular splitting tests were used to evaluate the high- and low-temperature performance; further, freeze-thaw splitting and immersion Marshall tests were performed to evaluate the water stability of the active cooling antirutting asphalt mixture. The results denote that TAP is useful for improving the rutting factor of asphalt. When the TAP content is 16% of the asphalt material, the maximum cooling value of the surface in laboratory tests becomes 5.9°C. When compared with an ordinary asphalt mixture, the dynamic stability of the active cooling antirutting asphalt mixture at medium and high temperatures increased by 18%–22%. The fracture energy can be increased by 12% at low temperatures. The maximum cooling value of the surfaces in outdoor tests is 7.2°C, and the water stability slightly decreases; however, it still satisfies the specification requirements.

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“…Meanwhile, scrap tires called “black pollution” are being generated and accumulated in vast quantities and causing severe environmental issues, so the reclamation of them has become a major concern [3]. Many researchers have shown that scrap tires can be pulverized and added to asphalt to improve the rutting resistance at high temperature, crack resistance at low temperature, aging resistance and fatigue resistance of asphalt pavement, and the environmental pollution can be alleviated at the same time [4,5,6,7]. Therefore, crumb rubber modified asphalt has important economic and environmental benefits and is receiving increasing attention.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Preparation Process and Storage Stability of Modified Asphalt Binder by Grafting Activated Crumb Rubber

Xie

Yang

et al. 2019

Materials

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According to the theory of molecular design, crumb rubber was grafting activated with acrylamide and then used as asphalt binder modifier. An orthogonal three-factor, three-level test was designed to optimize the preparation process of modified asphalt. Softening point, viscosity, rutting factor, ductility, stiffness modulus and creep speed index were selected as evaluation indicators to study the effects of rubber content, shear time and shear temperature by variance analysis and range analysis. The results show that the rubber content had a significant impact on the performance of modified asphalt with grafting-activated crumb rubber, while the shear temperature and shear time had little effect. The grafting activated crumb rubber content of 20%, shear temperature of 170–190 °C, and shear time of 90 min was determined as the reasonable preparation process. Modified asphalt with common crumb rubber (CRMA) and modified asphalt with grafting activated crumb rubber (A-G-R) were prepared, respectively, using the reasonable process to analyze the influence of grafting activation of crumb rubber. The results indicate that A-G-R had smaller softening point difference, lower segregation index and more stable and uniform dispersed phase.

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Laboratory and Field Investigation of the Feasibility of Crumb Rubber Waste Application to Improve the Flexibility of Anti-Rutting Performance of Asphalt Pavement

Cited by 21 publications

References 26 publications

Dynamic Shear Modulus and Damping Ratio of Sand–Rubber Mixtures under Large Strain Range

Dynamic Shear Modulus and Damping Ratio of Sand–Rubber Mixtures under Large Strain Range

Preparation and Properties of an Active Cooling Antirutting Asphalt Mixture

Investigation on Preparation Process and Storage Stability of Modified Asphalt Binder by Grafting Activated Crumb Rubber

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