Interaction and particle effect of crumb rubber characteristics on Brookfield viscosity of rubber asphalt binder(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2017年02期
- Page:
- 26-34
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Interaction and particle effect of crumb rubber characteristics on Brookfield viscosity of rubber asphalt binder
- Author(s):
- LI Bo; LI Peng; ZHANG Xin-yu; CAO Gui; YANG Xiao-long
- 1. Key Laboratory of Road & Bridge and Underground Engineering of Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China; 2. Gansu Provincial Transportation Research Institute Co. Ltd., Lanzhou 730050, Gansu, China; 3. Pavement Engineering and Research Center in Gansu Province, Gansu Road and Bridge Construction Group Co. Ltd., Lanzhou 730030, Gansu, China
- Keywords:
- road engineering; rubber asphalt; crumb rubber; Brookfield viscosity; high pressuregel permeation chromatographic; interaction effect; particle effect
- PACS:
- U414
- DOI:
- -
- Abstract:
- Effect of crumb rubber modifier (CRM) characteristics on rubber asphalt and rubber asphalt binder filtered rubber powder was studied based on Brookfield viscosity. These characteristics include content, particle size and production method. Large molecular sizes (LMS) of asphalt were analyzed by high pressure-gel permeation chromatographic experiment. Based on this, the influence mechanism of the interaction effect (IE) and the particle effect (PE) on Brookfield viscosity was discussed. The results show that the viscosity, IE, PE and LMS increase as the crumb rubber content increase for rubber asphalt binder, which is not obvious for asphalt binder filtered rubber particle size. The viscosity, IE, PE of ambient rubber asphalt binder are obviously larger than that of cryogenic CRM binders. The viscosity of cryogenic asphalt binder filtered rubber particle size is larger than that of ambient asphalt binder filtered rubber particle size when particle size is 80 mesh or high content. The LMS change rule is not obvious for ambient and cryogenic rubber asphalt binders. The viscosity and PE of 40 mesh rubber asphalt are larger than that of 30 and 80 mesh asphalt, and the IE of 80 mesh rubber asphalt is the highest. It is more effective to reduce particle size for the viscosity of cryogenic asphalt binder filtered rubber particle size. The smaller the particle size of rubber, the larger the LMS of rubber asphalt. LMS has a significant correlation with viscosity and certain relevance with IE, but it is poor for PE. There is a significant influence of crumb rubber modifier characteristics on rubber asphalt binder. Reasonable rubber characteristic is helpful to produce high efficiency rubber asphalt binder.
Last Update: 2017-04-07