Performance Analysis of Warm Mix and Flame-retardant High Viscosity Asphalt and Porous Asphalt Mixture
In order to explore the effect of warm mix agent and flame retardant on performance of asphalt and mixture,the asphalt basic and road performance evaluation of warm mix and flame retardant asphalt mixture are carried out.The influence rules of the incorporation of warm mixture and flame retardant are analyzed based on the basic parameters of high viscosity asphalt,such as penetration,softening point,ductility and penetration ratio after aging,as well as the road performance indexes of the mixture,such as scattering loss,residual stability,low-temperature bending failure strain and dynamic stability.At the same time,the oxygen index and smoke density of flame retardant modified asphalt are tested to explore the emission reduction effect of flame retardant.The data show that the addition of warm mixing agent can greatly improve the road performance of asphalt mixture,and the addition of flame retardant can obviously improve the aging performance of high viscosity asphalt,but the overall improvement and emission reduction effect of asphalt mixture is not obvious.The composite modification scheme increases the difficulty of mixing,resulting in a decrease in the comprehensive road performance of asphalt mixture.Considering the technical economy comprehensively,when using the porous drainage pavement in the tunnel,the warm mixing agent can be added selectively according to the specific needs,without adding flame retardant.
NETL
NSTL
万方数据
