Comprehensive Properties Evaluation of Modified Bio-Asphalt Mixture Based on Comparison Matrix

Abstract

The comprehensive properties evaluation index of asphalt mixture has the characteristics of multilevel and multifactor. The weight of each road performance index is the key factor to assess the comprehensive properties of the asphalt mixture. However, how to determine the weight objectively is a very key problem in the performance evaluation model. In this study, the comparison matrix method was used to determine the performance weight objectively of rock asphalt modified bio-asphalt mixture (RABAM). First, the neat asphalt mixture (NAM), bio-asphalt mixture (BAM), rock asphalt modified asphalt mixture (RAM), and RABAM were prepared. Second, the high-temperature and low-temperature properties, water damage resistance, and fatigue characteristics of the different asphalt mixtures was analyzed. Finally, the comprehensive properties were evaluated under different climate zones in China. The results indicated that the rock asphalt improves the comprehensive performance of BAM. Applying the comparison matrix method to the field of road materials can effectively evaluate the applicability of road materials in different regions.