Bamboo Fiber Modified Asphalt Mixture Proportion Design and Road Performances Based on Response Surface Method

In order to comprehensively utilize the remaining bamboo residue of bamboo products, this paper presents a research on recycling the bamboo fibers from bamboo residue for improving the performance of the asphalt mixtures. First of all, the basic performance parameters of sinocalamus affinis fiber, phyllostachys pubescens fiber, green bamboo fiber were tested and analyzed, and the optimal content and length were put forward. Then, the mix ratio design of the bamboo fiber modified asphalt mixture was further designed through the response surface method, and was verified the rationality of the mix ratio. Finally, the mixture specimens were made according to the experimental design mix ratio, and the high temperature, low temperature performance and moisture susceptibility of the bamboo fiber modified mixtures asphalt were tested. The results showed that the high temperature performance, low temperature performance and moisture susceptibility of bamboo fiber modified asphalt mixtures were improved compared with the performance of SBS modified asphalt mixture. When the length of bamboo fiber is 7.25 mm and the content of 0.22%, the road performance of the asphalt mixture was optimal. Consequentially, the decomposition of bamboo residue into bamboo fiber and its application in asphalt pavement can improve the reuse of bamboo waste, with remarkable environmental benefits and great promotion value.