普通混凝土冻融循环后性能的试验研究

Experimental Study on Properties of Concrete after Freezing and Thawing Cycles

对经过0、25、50、75、100次冻融循环的普通混凝土,进行了实验研究:主要测定了单轴抗压强度及单轴抗拉强度、单轴压及单轴拉时的峰值应变、初始弹性模量与峰值变形模量、动弹性模量、质量损失及应力-应变关系等数据,并建立了简单的数学表达式。随后对试验结果进行了分析。可以为北方寒冷地区的水坝、港口水工建筑物、公路、桥梁等的设计、维修、维护及其寿命预测等提供试验及理论依据。

The experimental study of plain concrete specimens suffering 0, 25, 50 ,75 and 100 cycles of freezing and thawing were carried out. The compressive strength and tensile strength , the initial elastic modulus, the secant modulus at the peak of stress, the dynamic modulus of elasticity, the weight loss and the stress-strain curve of concrete were measured. The testing rezults were discussed and the related regression formulas were established.