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鉴于橡胶颗粒的掺加会导致橡胶砂浆的密度、抗折、抗压强度等物理力学性能降低,为改善橡胶砂浆的力学性能,使用多种硅烷偶联剂的复配液、聚合物及硅灰分别对橡胶砂浆进行改性研究。试验结果表明,对于相同橡胶掺量的砂浆,硅烷偶联剂复配液、聚合物及硅灰的添加提高了橡胶砂浆的各项力学性能。变形试验结果表明,聚合物的掺加增加了砂浆的韧性,改善了橡胶与水泥水化物的界面粘结。耐磨性试验结果表明,低掺量的橡胶颗粒对砂浆耐磨性能影响可能不大,橡胶砂浆仍可保持较好的耐磨性。橡胶颗粒与水泥石界面存在明显空隙,是橡胶砂浆强度下降的主要原因之一。
In view of rubber particles will lead to the density of rubber mortar density, bending, compressive strength and other physical and mechanical properties to reduce the rubber mortar to improve the mechanical properties of the use of a variety of silane coupling agent compound solution, polymer and silica fume Rubber mortar were modified study. The test results show that for the same rubber content of mortar, silane coupling agent compound liquid, polymer and silica fume increase the mechanical properties of rubber mortar. Deformation test results show that the addition of polymer increases the toughness of mortar and improves the interfacial adhesion between rubber and cement hydrate. Abrasion resistance test results show that the low content of rubber particles on the wear resistance of mortar may not be significant, rubber mortar can still maintain good wear resistance. Rubber particles and cement stone interface obvious voids, rubber mortar strength is one of the main reasons.