橡胶粒子-PVA纤维复合改性水泥砂浆的性能研究

针对橡胶粒子改性水泥砂浆会造成砂浆强度大幅下降的问题,进行了利用PVA纤维和橡胶粒子复合改善水泥砂浆抗冲击性能和强度的试验研究,采用扫描电镜(SAEM)观察了橡胶粒子与水泥浆体的界面及PVA纤维在水泥砂浆中的分布.试验结果表明:复掺PVA纤维和橡胶粒子可显著提高水泥砂浆的抗冲击和抗裂能力,并可在一定程度上缓解因掺加橡胶引起的砂浆强度下降.

Properties of cement mortar incorporating rubber particles-PVA fiber

Because of the introduction of rubber particles,the strength of cement mortar declines substantially.The impact resistant and strength of cement mortar incorporating PVA fibers and rubber particles were investigated.The interfaces between rubber particles and paste,and the distri- bution of PVA fiber in mortar were observed with SEM.The results show that the impact resistance and anti-cracking capacity of cement mortar is significantly increased and a drop in strength of cement mortar is reduced by doping P...