Preparation and Performance Evaluation of Environmentally Friendly Asphalt Flame Retardant
China's mountainous geographic features lead to the growing number and scale of tunnels,and improving the flame retardant and smoke suppression function of asphalt is one of the key technologies for the safe operation of the asphalt pavement inside the tunnel.This paper prepared an environmentally friendly and efficient composite asphalt flame retardant using the chemical precipitation method and surface treatment technology with hollow beads as the carrier.The thermal stability of the self-made flame retardant,the flame retardant and smoke suppression effect of the modified asphalt with different flame retardant contents,and the road performance of the flame retardant asphalt mixtures were studied.The test results showed that the self-made flame retardant had two steps of thermal decomposition,occurring at 291 ℃ and 420℃,respectively,and the thermal stability met the construction requirements of asphalt pavement.The self-made flame retardant had a significant flame retardant and smoke suppression effect,and the modified asphalt with 5％and 8％flame retardant content could reach flame retardant class Ⅲ and Ⅱ.The utilization of the self-made flame retardant was flexible,which could be internally mixed to modify asphalt or externally mixed to replace the mineral powder(recommended),and improve the water stability of mixtures.The study result is significant for enhancing the safe operation of the asphalt pavement inside the tunnel.
万方数据
维普
