Study on Preparation and Performance Evaluation of Environment-Friendly Asphalt Mixture

Abstract

In this paper, the environmental characteristics of foaming asphalt mixture are analyzed and the benchmark ratio is determined by Marshall test. Through the research on the production control parameters of mineral foaming and mechanical foaming, on the one hand, the optimal content of ZQ mineral foaming agent was determined to be 7%. On the other hand, The water consumption for mechanical foaming of SBS modified asphalt was set as 3.0±0.2%, the asphalt temperature was set as 165±2°C, and the water temperature was set as 30±2°C. At the same time, a method for determining the optimal content of mineral foaming agent based on asphalt modulus evaluation is proposed, and determine the influence degree of each factor of mechanical foaming based on grey correlation method. During the mixing test, the actual production was simulated, the samples were formed after the mixture aged for 2 hours in a short time, and the cooling range and performance of the foamed asphalt mixture were studied. The results show that the foamed asphalt mixture can reduce about 25°C compared with the hot-mixed asphalt mixture, and the performance of the mixture can meet the requirements of the current specification.