西部交通建设

Experimental Study on High-temperature Performance of Rubber Powder and SBS Compound Modified Asphalt

西藏最大跨度斜拉桥——迫龙沟特大桥顺利通车4月13日,由中铁大桥局集团有限公司修建的西藏最大跨度斜拉桥——迫龙沟特大桥通车,这标志着国道318线通麦至105道班整治改建项目全线贯通。迫龙沟特大桥全长743米,主跨430米,是西藏境内最大跨度斜拉桥。桥梁基础采用群桩基础,主塔为A型塔,1号塔高度为146.7米,

Through testing the high-temperature performance of rubber powder and SBS compound modified asphalt of 30 different formulas,this article studied the influence of rubber powder mesh, ash content and SBS content on high-temperature performance of composite modified asphalt,the results showed that,with the increase of rubber powder or SBS content,the penetration degree of composite modified asphalt is reduced,while the softening point,elastic recovery and Brookfield viscosity are increased, with significant improvement of high-temperature performance, and 20-mesh rubber powder is more favorable to high-temperature performance of composite modified asphalt than 40-mesh rubber powder.And finally it selected the rubber powder and SBS compound modified asphalt formula with excellent high-temperature performance and significant technical and economic advantages： 20-mesh crumb rubber ： SBS ： matdx asphalt= 16% ： 2% ： 82%.