Authors: Mengmeng Wu Rui Li Yuzhen Zhang Jianming Wei Yuchao Lv Xuemei Ding
Publish Date: 2014/07/11
Volume: 11, Issue: 3, Pages: 454-459
Abstract
In this paper we investigate the reinforcement mechanism of high viscosity rubber/SBS modified asphalt mortar mixed with fiber mineral lignin or carbon fiber and deoiled asphalt DOA The softening point penetration and viscosity tests were conducted to characterize the engineering properties of asphaltfiber mortar The microstructure of fiber was observed using scanning electron microscopy SEM and the results indicated that fiber can effectively improve the toughness of asphalt matrix through forming a spatial network structure and then adhesion and stabilization of asphalt binder The cone penetration test was designed to study the rheological property of fiber modified asphalt The results indicated that the reinforcement effect increased with fibers and DOA fraction increasing to a certain threshold and the optimal fiber content was dependent on the fiber type and its length Fiber content and fillerasphalt ratio had significant effects on the softening point penetration viscosity and cone penetration of asphalt mortar
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