Effects of recycling agents and methods on the fracture and moisture resistance of asphalt mixtures with high RAP contents

Costa, Daniel Beserra; Neto, Osires de Medeiros Melo; Lucena, Lêda Christiane de Figueiredo Lopes; Luz, Priscila Maria Sousa Gonçalves

doi:10.1016/j.conbuildmat.2023.130312

Cited by 19 publications

(1 citation statement)

References 30 publications

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“…It can be seen that modifier content is the most important factor in the low-temperature performance of porous asphalt mixtures, followed by test temperature, with porosity and aging conditions being the smallest. Some researchers have found that adding polymer substances, fiber modifiers, and the mineral oil-based rejuvenating agent to the mixture can effectively improve low-temperature crack resistance [13][14][15][16]. Furthermore, some researchers have optimized the design of the mixture based on low-temperature performance.…”

Section: Introductionmentioning

confidence: 99%

Study on Low-Temperature Performance Decay of Composite-Modified Porous Asphalt Mixture under Medium- and High-Temperature Water Erosion

Chai,

Zhang,

Wang

et al. 2023

Materials

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This paper studies the decay law of low-temperature crack resistance performance of rubber powder basalt fiber composite-modified porous asphalt concrete (CM-PAC) under medium- and high-temperature water erosion. Firstly, the prepared Marshall specimens were subjected to water erosion treatment at different temperatures of 20 °C, 40 °C, and 60 °C for 0–15 days. Then, the processed specimens were subjected to low-temperature splitting tests, and acoustic emission data during the splitting test process were collected using an acoustic emission device. It can be seen that the low-temperature splitting strength and low-temperature splitting stiffness modulus of CM-PAC gradually decrease with the increase in water erosion time. The maximum reduction rates of the two compared to the control group reached 72.63% and 91.60%, respectively. The low-temperature splitting failure strain gradually increases. Under the same erosion time, the higher the temperature of water, the more significant the amplitude of changes in the above parameters. In addition, it is shown that as the water erosion time increases, the first stage of loading on the specimen gradually shortens, and the second and third stages gradually advance. As the water temperature increases and the water erosion time prolongs, the acoustic emission energy released by the CM-PAC specimen during the splitting process slightly decreases. The application of acoustic emission technology in the splitting process can clarify the changes in the failure pattern of CM-PAC specimens during the entire loading stage, which can better reveal the impact of medium- to high-temperature water on the performance degradation of CM-PAC.

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Section: Introductionmentioning

confidence: 99%