Author/Authors :
Zhang, Ji Northwest Normal University. - College of Life Science, China. , Wu, Yiqian Northwest Normal University. - College of Life Science, China. , Wang, Tunlong Northwest Normal University. - College of Life Science, China. , Wang, Youpeng Northwest Normal University. - College of Chemistry and Chemical Engineering - Institute of Polymers, China. , Wang, Yunpu Northwest Normal University. - College of Chemistry and Chemical Engineering - Institute of Polymers, China.
Abstract :
Weathered coal (WTC) modified asphalts with improved storage stability are prepared by incorporating styrene-butadiene rubber (SBR). The effects of WTC and SBR/WTC are studied on the storage and physical properties, and morphologies of the modified asphalts. It is found that the WTC has marked effect on the increasing of softening point at the content of 3 wt% while SBR has significant effect on the low temperature (5°C) properties and improvement of aging resistance at SBR content of 4 wt% in the WTC and SBR/WTC modified asphalts. The morphology of SEM and TEM photographs show that WTC was dispersed relatively uniform in asphalt which indicates compatibility and storage stability are improved by producing a homogeneous phase in modified asphalts. The FTIR analysis show new weak peak areas in modified asphalts indicating physical alteration is the main changes in modified asphalts.
Keywords :
weathered coal , SBR copolymer , modified asphalt , SBR , weathered coal compand , FTIR.
