DE硅改沥青及其混合料的路用性能  

DE siliceous modified asphalt and its pavement performance

作　　者：姚爱玲[1] 孙治军 徐德龙[1] 

机构地区：[1]西安建筑科技大学材料科学与工程学院 [2]陕西省高速公路工程咨询有限公司,陕西西安710086

出　　处：《长安大学学报（自然科学版）》2006年第5期5-8,共4页Journal of Chang’an University(Natural Science Edition)

基　　金：国家西部交通建设科技项目(200131800038)

摘　　要：复合型硅改性剂(DE)是无机沥青改性剂,它具有效果好、使用方便、经济性好等特点。采用实验方法研究了DE改性剂的特点、改性沥青的性能及改性沥青混合料的路用性能。结果表明:DE改性沥青与基质沥青相比,软化点升高,135℃粘度增大,针入度指数增加,当量脆点T1.2降低,说明改性后高温、低温性能与温度敏感性都有改善;DE改性沥青混合料与基质沥青混合料相比动稳定度提高了74%,冻融劈裂比提高了20%以上,抗疲劳性能也有较大幅度的提高。As a kind of inorganic asphalt modifier, DE has the advantages of better performance, greater convenience and more potential in energy saving. This paper studies the features of DE siliceous modified asphah, and the road performance of DE modified asphah mixture with experiment. The test results indicate that the soften point, dynamic viscosity at 135℃, and penetration index of DE siliceous modified asphah become bigger while brittle point T1.2 becomes smaller. The performance of high temperature and low temperature, temperature susceptibility of DE siliceous modified asphah are improved, its dynamic stability raises 74%, the ratio of freeze-thaw splitting increases 20%, its fatigue resistance is also increased greatly. 5 tabs, 1 fig, 6 refs.

关 键 词：道路工程 硅改沥青 硅藻土 沥青混合料 路用性能 

分 类 号：U414.75[交通运输工程—道路与铁道工程]