橡胶粉水泥砂浆作为水泥混凝土路面板底脱空灌浆材料的研究

发布时间：2018-06-05 16:21

本文选题：砂浆 + 灌浆材料　；参考：《河北工业大学》2014年硕士论文

【摘要】：利用废旧橡胶制成的橡胶粉粒掺入到混凝土和砂浆制成橡胶混凝土和橡胶粉砂浆已成为科研学者们研究的热点，且具有重要意义。本研究不仅利用了废旧橡胶，而且开发出干缩性能和抗冻性能较好的用于水泥混凝土路面板底脱空的灌浆材料。文章的研究基于已往橡胶混凝土和橡胶砂浆研究成果的基础上进行的。首先，利用正交设计设计试验，研究普通砂浆各组分对砂浆的强度、流动性和干缩性能的影响，研究表明：试验指标不同，各组分对试验指标影响程度大小的先后顺序、试验指标最优时的最优因素水平组合不同；其次，，利用以橡胶粉掺量、目数为因素的全面试验对橡胶粉砂浆的凝结时间、流动性、强度、干缩和抗冻性能等物理力学性能进行了试验研究，并对对其机理进行初步分析，研究表明：橡胶粉作为细集料掺入到砂浆中，改变新拌浆体和硬化浆体的一些性质。向普通砂浆中掺入橡胶粉后，砂浆的凝结时间变长，强度降低，流动性变差但保水性变好，干缩减小，抗冻性变好；橡胶粉目数变大，即粒径变小后，砂浆的凝结时间变得更长，强度降低也较多，新拌浆体粘稠、保水性能提高，干缩减小，抗冻性提高；最后，以流动度、分层度、12小时抗压强度和14天水中干缩率为试验指标，利用三因素两水平的正交表安排试验，以板底脱空对灌浆材料的要求为准则，研究掺入橡胶粉的板底脱空水泥基灌浆材料的试验最优配比。试验最优配比为水泥∶砂∶橡胶粉∶早强减水剂∶膨胀剂∶水=1∶0.32∶0.015（60目）∶0.01∶0.12∶0.45，且对灌浆材料的基本性能测试结果满足规范对板底脱空灌浆材料的要求。
[Abstract]:Rubber powder made from waste rubber has become a hot spot of scientific research and is of great significance to concrete and mortar to make rubber concrete and rubber mortar. This study not only used waste rubber, In addition, a grouting material with good dry-shrinkage and anti-freezing properties is developed. The research in this paper is based on the previous research results of rubber concrete and rubber mortar. Firstly, the effects of the components of ordinary mortar on the strength, fluidity and dry-shrinkage properties of mortar were studied by orthogonal design test. The results showed that the order of influence degree of each component on the test index was different. Secondly, the setting time, fluidity and strength of rubber mortar were tested by the comprehensive test with rubber powder content and mesh number as the factors. The physical and mechanical properties, such as dry shrinkage and freezing resistance, were experimentally studied, and its mechanism was preliminarily analyzed. The results showed that rubber powder was added into mortar as fine aggregate to change some properties of fresh mortar and hardened mortar. When rubber powder is added to the mortar, the setting time of mortar becomes longer, the strength decreases, the fluidity becomes poor, but the water retention property becomes better, the drying shrinkage decreases, the frost resistance becomes better, and the rubber powder number becomes larger, that is, when the particle size becomes smaller, The setting time of mortar becomes longer, the strength decreases more, the fresh mortar is viscous, the water retention property is improved, the dry shrinkage is reduced, and the frost resistance is improved. Finally, the flow degree, stratification degree and 12 hours compressive strength and the dry shrinkage rate in 14 days water are taken as the test index. Based on the test of orthogonal table with three factors and two levels, the optimum ratio of cement based grouting material mixed with rubber powder was studied according to the requirement of grouting material. The optimum ratio of the test is cement: sand: rubber powder: early strength water reducer: expander: water 1: 0.32: 0.01560 mesh: 1: 0.01: 0.12: 0.45, and the basic properties of grouting material meet the requirements of the specification for slab bottom void grouting material.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U414;U416.216

【参考文献】