Study on viscoelastic properties of rubber modified asphalt based on rheology
Tan Hua 1,2,3 Hu Songshan 1,2,3 Liu Binqing 1,2,3 Qin Runpu 1,2,3 Tong Shenjia4 Ren Shaobo 1,2,3
1. Guangxi Transportation Research Institute
2. Guangxi Key Laboratory of Road Struc ture and Materials
3. Research and Development Center on Technologies, Materials and Equipment of High Grade Highway Construction and Maintenance Ministry of Transport,
4. Xi′an University of Architecture and Technology
Abstract：In this study, viscoelastic properties of rubber modified asphalt were evaluated based on the rheological theory. Using dynamic shear rheometer, the matrix asphalt, modified asphalt, rubber modified asphalt with different additives, dry rubber particles and industrialized rubber asphalt were tested, respectively, for their hysteresis loops. Based on the indices such as the residual deformation, elastic energy-storage, elastic ratio and composite elastic modulus,the effects of modifying agent on the modification and viscoelastic properties of rubber asphalt were analyzed, and then, the conventional dynamic shear rheological tests were conducted on the samples for four types of scanning, namely strain scanning, temperature scanning, frequency scanning and time scanning. The results show that the properties of rubber modified asphalt are better than those of the matrix asphalt and the modified asphalt under high temperature; different modifying agents have significantly different effects on the modification of composited rubber asphalt, and among the modifying agents, the PE agent can improve the permanent deformation resistance of asphalt rubber, but its fatigue resistance is poor; the rock asphalt can increase the stiffness, viscous flow and fatigue resistance of rubber asphalt,; the swelling effects of desulfurization rubble powder and modifying agents are remarkable; The fatigue properties of industrialized rubber asphalt and dry rubber particles are obvious, and hence, rubber asphalt shall be composited and modified according to the needs in different application cases.
谭华 胡松山 刘斌清 覃润浦 童申家 任少博. 基于流变学的复合改性橡胶沥青黏弹特性研究[J]. 土木工程学报, 2017, 50(1): 115-122.
Tan Hua Hu Songshan Liu Binqing Qin Runpu Tong Shenjia . Study on viscoelastic properties of rubber modified asphalt based on rheology. 土木工程学报, 2017, 50(1): 115-122.
