关键词: 透水混凝土;冻融循环;质量损失;动弹模量

Abstract: Freeze-thaw damage of pervious concrete has been a serious problem which discourages its application in north China.To solve this problem, a series of experiments were carried out to study the effect of admixtures on compressive strength and freeze-thaw resistance of pervious concrete.Three admixtures, fly ash, ethylene vinyl acetate (EVA) latex and polyethylene fiber with different replacement of cement were used in this study, and physical properties such as permeability and compressive strength were tested.The freeze-thaw cycle tests were conducted base on fast freeze-thaw test.Mass loss and dynamic modulus were chosen for evaluation index.The results indicate that positive effects are found on freeze-thaw resistance for pervious concrete specimens with the addition of admixtures, but the degree and mechanism of effects are different for different admixtures.

Key words: pervious concrete;freeze-thaw cycle;mass loss;dynamic modulus of elasticity