Research on road performance of porous steel slag asphalt mixture
In order to improve the utilization rate of steel slag solid waste materials in road engineering construction,a volume exchange algorithm was used to replace basalt aggregates with different amounts of converter steel slag(2.36～16 mm)(0,25％,50％,75％).High-temperature rutting tests,freeze-thaw splitting tests,dynamic water erosion tests,volume expansion rate tests,and per-meability coefficient tests were conducted.The results show that with the increase of steel slag content,the optimal bitumen-aggre-gate ratio of porous steel slag asphalt mixture mixed with 8％high viscosity agent and 0.2％polyester fiber increases.The high-temperature resistance to rutting,water damage,and water permeability of the mixture are improved,but it is not conducive to vol-ume stability.The water immersion volume expansion rate increases,but still meets the specification requirement of not more than 1.5％of standard JTG F40-2004"Technical Specification for Construction of Highway Asphalt Pavement".Through comprehensively consideration,it is recommended to control the amount of steel slag between 50％and 75％.At this time,the road performance is better,which can achieve efficient utilization of steel slag solid waste materials.
road engineeringsteel slagporous asphalt mixturehigh temperature stabilitywater stabilityvolume expansion rate
万方数据
维普
