粉胶比对SBS改性沥青胶浆力学性能的影响分析.pdf

施工技术 2017年8月上 88 CONSTRUCTION TECHNOLOGY 第46卷第15期 D0I:10.7672/8js2017150088 粉胶比对SBS改性沥青胶浆力学性能的影响分析 牛永宏，唐德密 (中交一公局第五工程有限公司，北京100024) [摘要]为了研究不同粉胶比对SBS改性沥青胶浆力学性能的影响，选取针入度试验、低温弯曲试验、动态剪切流 变试验研究5种粉胶比下沥青胶浆的高温稳定性、低温抗裂性和抗车辙能力.研究表明：粉胶比的增大使针人度 减小、抗剪强度增大，但是其受温度影响较大，提高粉胶比可增大抗剪强度但低温时易开裂；温度为0℃时，沥青胶 浆的弯曲劲度模量受粉胶比影响较大，而温度为5℃时，沥青胶浆的蟠变变形受粉胶比的影响较大，因此在低温地 区铺筑沥青路面时应综合考虑粉胶比的作用；对于动态剪切流变试验，粉胶比的增加使沥青胶浆结构中弹性组分 增多、流动变形减小，提高了沥青胶浆的抗车辙能力. [关键词]沥青；SBS改性沥青；粉胶比；力学性能；试验研究 [中图分类号]TU535 [文献标识码]A[文章编号]1002-8498(2017)15-0088-05 Effect of Filler-bitumen Ratio on Mechanical Properties of SBS Modified Asphalt Mucilage NIU Yonghong TANG Demi (CCCC First Highicay Fifth Engineering Co.Lad.Beijing 100024 China) Abstract:In order to study the different filler-bitumen ratio on the mechanical behavior of SBS modified asphalt mucilage cone penetration test bending test at low temperature and dynamic shear rheological test were chosen to research the high temperature stability low temperature cracking resistance and rutting resistance of asphalt mucilage with five dosage of filler-bitumen ratio in the paper.The results show that:the increase of filler-bitumen ratio can reduce cone penetration and increase shear strength. However filler-bitumen ratio is obviously affected by temperature.Improving filler-bitumen ratio can increase shear strength but dehisce in the low temperature.When temperature is 0℃，the bending stiffness modulus of asphalt mucilage is influenced by the filler-bitumen ratio obviously.Meanwhile when temperatu...