doi:10.16186/j.cnki.1673-9787.2020.1.20

Received:2019/07/15

Revised:2019/08/20

Published:2020/01/15

Study on road performance of composite fiber asphalt mixture

MA Feng1, LI Yongbo1, FU Zhen2, HAN Weihua1, ZHANG Chao1

1.School of Highway， Chang’an University， Xi’an  710064 ， Shaanxi， China;2.School of Materials Science and Engineering， Chang’an University， Xi’an  710064 ， Shaanxi， China

Abstract:In order to study the effects of KTLF1 composite modified fiber and KTLG2 modified fiber on the road performance of asphalt mixture， lignin fiber and basalt mineral fiber were selected to test the high temperature stability， low temperature crack resistance， fatigue resistance and water stability road performance of the asphalt mixture through the rutting test， low temperature bending test， immersion marshall test，fatigue test and freeze - thaw spliting test under the optimal fiber content. The results showed that the high temperature performance of the composite fiber was greatly improved than that of general asphalt mixture， lignin fiber and basalt fiber， the strain energy of composite modified fiber at low temperature was larger than that of general asphalt mixture， and it had advantages over other two kinds of fibers. The fatigue properties of the two modified fibers were not much different， which were significantly improved compared with those of general asphalt mixtures， lignin fibers and basalt fibers. The water stability of composite modified fibers was improved greatly compared with the other two fibers.

Key words:KTLG2 modified fiber;KTLF1 composite modified fiber;optimal fiber content;asphalt mixture;road performance

复合纤维沥青混合料路用性能研究_马峰.pdf