Abstract:In order to solve the problems of insufficient interlayer bonding and low temperature cracking of asphalt macadam seal coat, a certain content of basalt fiber was added to the asphalt macadam seal coat and different types of basalt fiber asphalt macadam seal coat were prepared. Through the plate impact test, pull out test and shear test, the effects of basalt fiber content, length and emulsified asphalt content on the asphalt macadam seal coat bonding property were systematically analyzed. Based on the mixed grey target decision making method, the comprehensive bonding properties of basalt fiber asphalt macadam seal coat were compared and evaluated. The reasonable amount of each material was further determined, and the bonding properties and service performance of basalt fiber asphalt macadam seal coat were improved. The results show that compared with asphalt macadam seal coat, aggregate loss rate of basalt fiber asphalt macadam seal coat is lower than 110%305%, interlaminar pull out strength and shear strength of it are increased by 117%163% and 97%224% respectively. Considering the road performance and economic benefits, the optimum content of emulsified asphalt is 16kg/m2 and the optimum content of basalt fiber is 80g/m2.