水泥砂浆韧性改善的试验研究

Research on improving of toughness for cement mortar

引入缓慢弯曲试验法 ,对水泥砂浆的增韧改性进行了试验研究。结果发现 ,适量掺加沸石矿粉 ,对水泥砂浆韧性的提高有一定贡献 ;适量引气剂的掺入 ,可以在较大程度上提高其断裂能 ;合理加大砂灰比 ,也是提高水泥砂浆断裂能 (韧性 )廉价而有效的方法之一。

In this paper research on improving of toughness for cement mortar is carried out by applying the slowly bending experimental method.The relationships between fracture energy and mineral powder,emulsion powder,sand cement ratio as well as air entrainment agent in cement mortar have been studied firstly.The results show that the larger fracture energy of cement mortar can be obtained by adding just the right amount of zeolite mineral powder or air entrainment agent.Futhermore,increasing sand cement ratio properly can also improve the fracture energy of cement mortar considerably.