Experimental Study on Road Performance of Glass Fiber Reinforced Rubber Powder/SBS Composite Modified Asphalt Mixture
In order to improve the service performance of rubber powder/SBS composite modified asphalt mixture,different amounts of glass fiber were mixed into rubber powder/SBS asphalt mixture for modification.The effects of different glass fiber contents on the mechanical properties and road performance of rubber powder/SBS composite modified asphalt mixture were systematically investigated by Marshall strength test,splitting test,high temperature rutting test,low temperature bending test,immersion Marshall test and freeze-thaw splitting test.The results show that with the increase of glass fiber content,the mechanical properties and road performance of rubber powder/SBS composite modified asphalt mixture are improved.The Marshall stability,splitting strength,immersion residual stability and freeze-thaw splitting strength ratio of rubber powder/SBS composite modified asphalt mixture gradually increase.The dynamic stability and maximum flexural tensile strain increase first and then decrease with the increase of glass fiber content,while the stiffness modulus decreases first and then increases with the increase of glass fiber content.The incorporation of glass fiber can effectively improve the mechanical properties and road performance of rubber powder/SBS composite modified asphalt mixture,but excessive incorporation will be detrimental to high temperature rutting resistance and low temperature crack resistance.The optimum content of glass fiber is 0.3％,which is beneficial to improve the comprehensive service quality and performance of rubber powder/SBS composite modified asphalt mixture.
万方数据
维普
