施工技术 2016年9月上 98 CONSTRUCTION TECHNOLOGY 第45卷第17期 D0I:10.7672/sgjs2016170098 冻融循环对橡胶沥青混合料性能影响试验研究* 王海鹏，李洪峰 (东北林业大学工程咨询设计研究院，黑龙江哈尔滨150040) [摘要]为了探究多次冻融条件下，橡胶沥青混合料性能指标的变化是否呈现规律性，根据以往的研究成果，选取 合适的冻融方法和混合料配合比，通过试验研究了冻融循环对橡胶沥青混合料性能的影响规律.结果表明：橡胶 沥青混合料的性能受冻融循环及冻融循环次数的影响较为明显，变化幅度较大.随着冻融循环次数增加，混合料 的劈裂强度、劲度模量指标呈现出明显的减小趋势，而拉伸应变指标呈现出明显的增大趋势；以抗冻性为主的沥青 混合料的配合比不宜选用低油石比、大空隙率的橡胶沥青混合料，混合料的空隙率在3.5%~5.0%范围抗冻融性 能最优. [关键词]公路工程；橡胶沥青；冻融循环；劈裂强度；拉伸应变；劲度模量 [中图分类号]U414 [文献标识码]A [文章编号]1002-8498(2016)17-0098-05 Experimental Study on the Influence of Freeze-thaw Cycles on the Properties of Rubber Asphalt Mixture Wang Haipeng Li Hongfeng Engineering Consulting Design Institute Northeast Forestry University Harbin Heilongjiang 150040 China) Abstract:To explore the properties changing law of the rubber asphalt mixture under freeze-thaw condition based on the results of previous research this paper selected appropriate freeze-thaw method and mixture mix proportion studied the influence rule of freeze-thaw cycles on rubber asphalt mixture properties through indoor test.The results showed that:the freeze-thaw cycles had a large effect on the mixture properties the splitting strength and stiffness modulus decreased with the number of freeze-thaw cycles increases conversely the tensile strain increased with the number of freeze-thaw cycles increases. The mixture mix proportion should not choose lower asphalt-aggregate ratio and larger void ratio for frost- resistance purpose the frost-resistance property of the mix...
冻融循环对橡胶沥青混合料性能影响试验研究.pdf
