An experimental study of the viscoelastic characteristics and fatigue performance of asphalt binder modified by CNT nanoparticles
Source abstract
Abstract
This study aims to investigate the effectiveness of carbon nanotubes (CNTs) and styrene-butadiene-styrene (SBS) on the fatigue performance of two types of base asphalt binders (70# and 90#). Frequency sweep and linear amplitude sweep (LAS) tests were carried out on CNT- and CNT/SBS-modified asphalt binders using a dynamic shear rheometer. The fatigue damage characteristics and fatigue failure behavior of the modified binders were analyzed using the simplified viscoelastic continuous damage theoretical model. The dynamic modulus master curve outcomes indicated that incorporating CNT and SBS enhanced the stiffness and elastic recovery of the base asphalt binder, thereby enhancing its resistance to permanent deformation. The results of the LAS tests showed that incorporating CNT nanoparticles can significantly improve the fatigue life of 70# and 90# base asphalt binders. The fatigue damage resistance of both the CNT-modified and the CNT/SBS-modified asphalt binders was also significantly improved. The fatigue life of the 90#/CNT-modified asphalt binder was greater than that of the 70#/CNT-modified asphalt binder under an unaged condition. After the short-term aging process, the fatigue life of the modified asphalt binder decreases, and the fatigue life of the modified asphalt binder after ultraviolet aging indicates an additional reduction in overall fatigue life.
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Research context
OpenAlex topics: Asphalt Pavement Performance Evaluation · Polymer Nanocomposites and Properties · Innovative concrete reinforcement materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Taihang Urban and Rural Construction Group Co. Ltd. 1 , 569 Shitong Rd., Shijiazhuang City 050200,
School of Civil Engineering and Communication, North China University of Water Resources and Electric Power 2 , Zhengzhou 450045,
School of Water Conservancy and Transportation, Zhengzhou University 3 , 100 Science Rd., Zhengzhou City 450001,
Henan Zhonggong Design and Research Group Co. Ltd. 4 , Zhengzhou 450000,
Funding
China Postdoctoral Science Foundation · National Science Foundation of Henan Province · the First-Class Project Special Funding of Yellow River Laboratory · The Henan Province Science and Technology Key Project · The Key Research Project for Higher Education Institutions of Henan Province
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