聚合物乳液对水泥砂浆流变性能的影响

发布时间：2018-06-20 13:36

本文选题：道路工程 + 聚合物乳液　；参考：《建筑材料学报》2017年06期

【摘要】：采用流变学测试方法,研究了聚合物乳液对水泥砂浆屈服应力、蠕变恢复、动力黏度及触变性的影响.结果表明:水泥砂浆屈服应力随着聚合物乳液掺量的增加而急剧增大,最大增至普通水泥砂浆的9.62倍;水泥砂浆蠕变在外力作用下逐渐增大,撤销外力后出现瞬时恢复,之后保持恒定,蠕变恢复能力随着聚合物乳液掺量的增加而增大,最大增幅在100倍左右;水泥砂浆动力黏度随剪切时间的增加而不断减小,聚合物乳液掺量的增大加剧了动力黏度减小的趋势;在触变性试验中随着聚合物乳液掺量的增加,水泥砂浆结构破坏后的恢复能力不断增强,最大增幅为72.57%.
[Abstract]:The effects of polymer emulsion on yield stress, creep recovery, dynamic viscosity and thixotropy of cement mortar were studied by rheological test. The results show that the yield stress of cement mortar increases sharply with the increase of polymer emulsion content, and the maximum increases to 9.62 times of that of ordinary cement mortar, the creep of cement mortar increases gradually under the action of external force, and the instantaneous recovery occurs after the removal of external force. The creep recovery ability increases with the increase of polymer emulsion content, the maximum increase is about 100 times, and the dynamic viscosity of cement mortar decreases with the increase of shear time. The increasing content of polymer emulsion intensifies the decreasing trend of dynamic viscosity. In thixotropy test, the recovery ability of cement mortar structure after destruction is enhanced with the increase of polymer emulsion content, the maximum increase is 72.57.
【作者单位】：重庆交通大学土木工程学院;云南省交通规划设计研究院陆地交通气象灾害防治技术国家工程实验室;交通运输部公路科学研究院;哈尔滨工业大学交通科学与工程学院;
【基金】：云南省应用基础研究面上项目(2016FB099) 云南省交通规划设计研究院科技项目(ZL-2015-04) 国家自然科学基金资助项目(51508137) 中国博士后科学基金面上资助项目(2014M560266) 国际合作项目(2014DFR81000)
【分类号】：U414

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