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Effects of different antistripping agents on properties of crumb rubber modified asphalt(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2020年5期
Page:
1-14
Research Field:
道路工程
Publishing date:

Info

Title:
Effects of different antistripping agents on properties of crumb rubber modified asphalt
Author(s):
ZHANG Henglong;  DUAN Haihui;  TANG Juncheng;  WU Chaofan
1. Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of HunanProvince, Hunan University, Changsha 410082, Hunan, China; 2. College of Civil Engineering, HunanUniversity, Changsha 410082, Hunan, China; 3. Hunan Provincial Engineering Research Center forConstruction Solid Wastes Recycling, Hunan Yunzhong Recycling TechnologyCo., Ltd, Changsha 410205, Hunan, China
Keywords:
road engineering;  crumb rubber modified asphalt;  antistripping agents;  aging property;  moisture damage resistance property;  surface energy experiment
PACS:
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DOI:
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Abstract:
In order to clarify the influence of different antistripping agents on the performance of crumb rubber modified asphalt, the effects of three kinds of antistripping agents (M1, T9 and LOF6500) and their contents (0.25%, 0.50% and 0.75% by the mass of asphalt binder, the same below) on the physical, rheological, aging and adhesion of crumb rubber modified asphalt were investigated. The physical properties of crumb rubber modified asphalt were tested by softening point, penetration, ductility and Brookfield rotational viscosity tests. The rheological properties of crumb rubber modified asphalt were tested by dynamic shear rheometer. The shortterm and longterm aging of asphalt samples were simulated by thinfilm oven aging test (TFOT) and pressure aging vessel (PAV), respectively. Also, the adhesion work and stripping work between the crumb rubber modified asphalt and the typical aggregate types were measured. The results show that M1, T9 and LOF6500 are beneficial to improve the ductility and low temperature performance of crumb rubber modified asphalt, and are suitable for road construction in cold regions. There is no need to adjust mixing and compaction temperature during construction. The addition of antistripping agents has not changed the hightemperature performance grades of crumb rubber modified asphalt, meaning little effect on its high temperature performance, and is conducive to improving the antiaging properties of crumb rubber modified asphalt.Specifically,M1 and LOF6500 have better shortterm aging resistance than T9, but T9 and LOF6500 are better than M1 in improving longterm aging resistance. Besides, three kinds of antistripping agents can increase the adhesive work and reduce the stripping work of crumb rubber modified asphalt, improve the adhesion between crumb rubber modified asphalt and aggregate, and improve the water stability of mixture. And 0.75% dosage M1 or LOF6500 has the best effect on improving the adhesion between crumb rubber modified asphalt and aggregate. Considering the influence of antistripping agents on the physical, rheological, aging and adhesion between aggregate and crumb rubber modified asphalt, LOF6500 with a dosage ranging from 0.5% to 0.75% is recommended. 5 tabs, 16 figs, 30 refs.

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Last Update: 2020-10-12