摘要
利用高吸水性树脂(SAP)引入数量不等的内养护水,研究了低水胶比混凝土强度、重量损失、电阻率和收缩的变化规律。结果表明,SAP的加入一定程度上降低了混凝土的抗压强度和劈裂抗拉强度,提高了混凝土的保水性,混凝土表面和内部的电阻率也有所下降,混凝土的自收缩大大降低,且混凝土的早期干缩也有所下降。
By adding super absorbing polymer （SAP） into the concrete with low water-binder ratio as an internal cur- ing agent, and by adding additional curing water to the concrete, the autogenous shrinkage of the concrete can be signifi- cantly reduced. The effects of the addition of SAP on the properties of the concrete with water-binder ratio 0.3 are investi- gated. The results show that the addition of SAP leads to the decrease of the compressive and tensile strength and the electrical resistivity. The water retention for the concrete incorporation SAP is higher compared to the concrete without SAP. The addition of SAP into the concrete with low water-binder ratio can remarkably reduce the autogenous shrinkage, and it can also decrease the early dry shrinkage of concrete.
出处
《混凝土与水泥制品》
北大核心
2013年第7期7-10,共4页
China Concrete and Cement Products
关键词
混凝土
高吸水性树脂
强度
保水性
电阻率
收缩
Concrete
Super absorbing polymer
Strength
Water retention
Electrical resistivity
Shrinkage
