Feasibility Analysis of the Application of Flame Retardant Asphalt Mixed with Steel Slag in Tunnel Pavement
Steel slag aggregate was used to prepare warm mix flame retardant asphalt concrete,and its road performance and flame re-tardant property were evaluated.The flame retardancy and road performance of steel slag flame retardant asphalt mixture were studied by flame gun heating test,adhesion test,semicircle bending test and swing value test.The results show that the asphalt concrete pre-pared by steel slag aggregate has high specific heat capacity and low thermal conductivity,which can improve the flame retardant prop-erty of warm mix flame retardant asphalt concrete.The aggregate stripping rate(SR)of asphalt mixture mixed with steel slag continuous-ly decreases with the increase of steel slag content.When the steel slag content is 0,the SR value is 13.1%,while when the steel slag content is 60%,the SR value is 9.5%,indicating that the asphalt mixture mixed with steel slag has better bonding properties.The SCB strength and swing value of steel slag asphalt mixture are higher than that of ordinary asphalt mixture,and the steel slag flame retardant asphalt mixture has better low temperature anti-crack property and anti-sliding property than ordinary asphalt mixture.Therefore,as-phalt mixture mixed with steel slag is more suitable for tunnel pavement in wet environment.
万方数据
维普
