沥青砂浆剪切力学性能影响因素研究

发布时间：2018-07-01 09:08

本文选题：沥青砂浆 + 应力-应变　；参考：《中外公路》2017年05期

【摘要】：应用MTS试验仪进行沥青砂浆直剪试验,研究分析了级配、沥青基材料和冻融作用对沥青砂浆剪切力学性能的影响。结果表明:同等粒径条件下,体积比增加1%,内摩擦角φ、黏聚强度c分别增加7.3%、3.4%;非同等粒径条件下,最大粒径为1.18mm沥青砂浆φ、c值是最大粒径0.075mm沥青砂浆的4.03倍和3.33倍。橡胶沥青砂浆抗剪性能明显高于70#沥青,添加外加剂KS后效果更优,其φ、c值至少提高30.5%、45.5%。冻融作用后,70#沥青+KS、橡胶沥青+KS的φ、c值最小降低12.3%、8.2%,有效控制冻融作用,可以有效保障沥青砂浆的抗剪性能。
[Abstract]:The direct shear test of asphalt mortar was carried out by using MTS tester. The effects of gradation, asphalt base material and freeze-thaw on the shear mechanical properties of asphalt mortar were studied and analyzed. The results show that under the same particle size, the volume ratio increases by 1, the internal friction angle 蠁 and the cohesive strength c increase by 7.3and 3.4.The maximum diameter of 1.18mm asphalt mortar is 4.03 times and 3.33 times of the maximum diameter of 0.075mm asphalt mortar under the condition of different particle size. The shear resistance of rubber asphalt mortar is obviously higher than that of 70# asphalt, the effect of adding additive KS is better, and the 蠁 c value of rubber asphalt mortar is at least 30.5% 45.5% higher than that of 70# asphalt. After freezing and thawing, the 蠁 c value of KS and KS of rubber asphalt can be reduced by 12.3and 8.2.The freezing and thawing effect can be effectively controlled, and the shearing property of asphalt mortar can be effectively guaranteed.
【作者单位】：河北省交通规划设计院河北省道路结构与材料工程技术研究中心;
【基金】：河北省交通运输厅科技计划项目(编号:2013-1-21)
【分类号】：U414

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