文章摘要
牛冬瑜,漆祥,韩森,徐鸥明,孙培.不同沥青基材料砂浆抗剪力学性能分析[J].材料导报,2016,30(14):149-153
不同沥青基材料砂浆抗剪力学性能分析
Study on the Shear Performance of Various Asphalt Matrix Material Mortar
  
DOI:10.11896/j.issn.1005-023X.2016.14.033
中文关键词: 沥青砂浆 剪切试验 力学响应 抗剪强度 冻融条件
英文关键词: asphalt mortar, shear test, mechanical response, shear strength, freezing-thawing conditions
基金项目:国家自然科学基金(51578076);中央高校基本科研业务费专项资金基础研究项目(310831161010)
作者单位E-mail
牛冬瑜 长安大学材料科学与工程学院, 西安 710064
长安大学交通铺面材料教育部工程研究中心, 西安 710061 
niudongyu_1984@163.com 
漆祥 长安大学特殊地区公路工程教育部重点实验室, 西安 710064  
韩森 长安大学特殊地区公路工程教育部重点实验室, 西安 710064  
徐鸥明 长安大学材料科学与工程学院, 西安 710064
长安大学交通铺面材料教育部工程研究中心, 西安 710061 
 
孙培 长安大学特殊地区公路工程教育部重点实验室, 西安 710064  
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中文摘要:
      为了量化分析沥青混合料中不同沥青基材料砂浆抗剪力学性能的优劣,使其结果作为判断沥青砂浆影响混合料路用性能的依据,以剪切试验为基础,分析了常规条件与冻融条件下,橡胶沥青砂浆、70#沥青砂浆及其加入外掺剂砂浆的应力响应规律,提出了定量分析砂浆抗剪性能的指标,对4种砂浆的抗剪力学性能进行了对比分析。研究结果表明:常规条件下,70#沥青砂浆的黏聚强度c与内摩擦角φ分别为橡胶沥青砂浆的77%和76%,加入外掺剂橡胶沥青砂浆的黏聚强度c与内摩擦角φ分别为未加外掺剂橡胶沥青砂浆的1.41倍和1.29倍,由此可知,使用橡胶沥青与加入外掺剂,不仅能够提高砂浆的强度,而且可以改善砂浆的抗剪力学性能;冻融条件下,70#沥青砂浆的黏聚强度c与内摩擦角φ分别为橡胶沥青砂浆的64%和61%,加入外掺剂70#沥青砂浆的黏聚强度c与内摩擦角φ分别为未加外掺剂70#沥青砂浆的1.18倍和1.46倍,由此可知,使用橡胶沥青与加入外掺剂能够改善砂浆的水稳定性,减少冻融损伤,确保冻融后砂浆的抗剪切力学性能。
英文摘要:
      In order to determine the impact of the shear property of asphalt mortar on the performance of asphalt mixture, this paper conducted a quantitative study on the shear properties of various asphalt mortar. Based on shear tests, the stress responses of four different mortar materials, including the 70# asphalt mortar with and wi-thout mixing additives and the rubber asphalt mortar with and without mixing additives, were analyzed under normal conditions and freeze-thaw conditions respectively. Then, a shear property index was proposed to quantify and compare the shear performance of these four mortar materials. The results indicated that the cohesion strength and the internal friction angle of the 70# asphalt mortar were 77% and 76% of corresponding values of the rubber asphalt mortar respectively, while the cohesion strength and the internal friction angle of the rubber asphalt mortar with additives were 1.41 times and 1.29 times greater than those of the rubber asphalt mortar without additives respectively. There-fore, the adoption of rubber asphalt and additives can improve not only the strength, but also the shear performance of asphalt mortar under normal conditions. On the other hand, under freeze-thaw conditions, the cohesion strength and the internal friction angle of the 70# asphalt mortar were 64% and 61% of corresponding values of the rubber asphalt mortar respectively, while the cohesion strength and the internal friction angle of the 70# asphalt mortar with additives were 1.18 times and 1.46 times greater than those of the 70# asphalt mortar without additives respectively. Therefore, the adoption of rubber asphalt and additives both are able to improve the water stability of the mortar, reduce the freeze-thaw damage, and ensure the shear property of the asphalt mortar after freeze-thaw action.
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