performance of asphalt mixture under freezethaw cycles in
cold plateau regions
(1. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang′ an University, Xi′an, Shaanxi 710064, China; 2.Transportation Research Institute of Jiangxi, Nanchang, Jiangxi 330038, China)
Abstract：Based on oneway ANOVA method, the low temperature bending test was conducted
to discuss the effects of asphalt species, graded type and nominal maximum particle size
on low temperature anticracking performance of asphalt mixture. Taking bending strain
energy density as evaluation indicator, the effects of asphalt species on low temperature
anticracking performance of asphalt mixture were analyzed by grey relational degree
theory. The results show that the low temperature anticracking performance of SBS/SBR
modified asphalt mixture is the best and followed by SBS modifying and SBR modifying.
Asphalt mixture graded B with skeleton dense structure has better low temperature anti
cracking performance than asphalt mixture graded A. The low temperature anticracking
performance of asphalt mixture AC13 is better than those of AC20 and AC25. SBS/SBR
modified asphalt mixture with skeleton dense structure and little nominal maximum particle
size can improve the low temperature anticracking performance of asphalt mixture under
freezethaw conditions.
2016, Vol. 37 
