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A platform for research: civil engineering, architecture and urbanism
Effect of LDHs on the aging resistance of crumb rubber modified asphalt
Highlights LDHs improved the ageing resistance of crumb rubber modified asphalt (CRMA). LDHs present significant influences on properties of CRMA after UV aging. Less carbonyl groups appeared in the aged LDHs/CRMA than in the aged CRMA. LDHs modified CRMA has a better performance at both low and high temperatures.
Abstract Layer double hydroxides (LDHs), a kind of ultraviolet light resistant material, was added into the Crumb Rubber Modified Asphalt (CRMA) and its effects on the aging resistance of the CRMA were investigated in this paper. The short-term and long-term aging processes of asphalt were simulated by Thin Film Oven Test (TFOT) and ultraviolet (UV) radiation test, respectively. With Fourier Transform Infrared Spectroscopy (FTIR) measurements, it was found that LDHs can slow down the formation of carbonyl groups during the aging process. The conventional physical properties test and Dynamic Shear Rheometer (DSR) test were used to evaluate the properties of the asphalt. The results showed that the softening point increases and G* ratios of CRMA decreases significantly, the ductility and the penetration retention rate increase after ultraviolet aging due to the introduction of LDHs. Besides, the results of both creep and relaxation test implied that the LDHs modified CRMA binder has a better UV aging resistance.
Effect of LDHs on the aging resistance of crumb rubber modified asphalt
Highlights LDHs improved the ageing resistance of crumb rubber modified asphalt (CRMA). LDHs present significant influences on properties of CRMA after UV aging. Less carbonyl groups appeared in the aged LDHs/CRMA than in the aged CRMA. LDHs modified CRMA has a better performance at both low and high temperatures.
Abstract Layer double hydroxides (LDHs), a kind of ultraviolet light resistant material, was added into the Crumb Rubber Modified Asphalt (CRMA) and its effects on the aging resistance of the CRMA were investigated in this paper. The short-term and long-term aging processes of asphalt were simulated by Thin Film Oven Test (TFOT) and ultraviolet (UV) radiation test, respectively. With Fourier Transform Infrared Spectroscopy (FTIR) measurements, it was found that LDHs can slow down the formation of carbonyl groups during the aging process. The conventional physical properties test and Dynamic Shear Rheometer (DSR) test were used to evaluate the properties of the asphalt. The results showed that the softening point increases and G* ratios of CRMA decreases significantly, the ductility and the penetration retention rate increase after ultraviolet aging due to the introduction of LDHs. Besides, the results of both creep and relaxation test implied that the LDHs modified CRMA binder has a better UV aging resistance.
Effect of LDHs on the aging resistance of crumb rubber modified asphalt
Pang, Ling (author) / Liu, Kuangyi (author) / Wu, Shaopeng (author) / Lei, Min (author) / Chen, Zongwu (author)
Construction and Building Materials ; 67 ; 239-243
2013-01-01
5 pages
Article (Journal)
Electronic Resource
English
Technical Standards of Rubber Asphalt and Crumb Rubber Modified Asphalt
| Trans Tech Publications | 2014