不同含气量对水工混凝土性能的影响研究

Study on Influence of Different Gas Content on Performance of Hydraulic Concrete

文章通过多种试验方法,全面探究了含气量对水工混凝土强度、孔隙结构及其抗冻性的影响规律。结果表明,引气剂的掺入会增加混凝土含气量、总孔面积、总孔体积及孔隙率,使得平均孔径、孔间距系数减少以及内部孔径更均匀分布,有效提升整体抗冻性能,但是受限于强度条件,在合理范围内的含气量既不会导致明显的强度损失,又能够提高抗冻能力。

In this paper,the influence of gas content on strength,pore structure and frost resistance of hydraulic concrete has been investigated by various test methods.The results show that the addition of air entraining agent can increase the air content,total pore area,total pore volume and porosity of concrete,reduce the average pore size,pore spacing coefficient and more uniform distribution of internal pore size,and effectively improve the overall frost resistance.However,limited by the strength conditions,the air content within a reasonable range will not lead to significant strength loss,but also improve the frost resistance.