大跨径钢管拱主弦管混凝土在益阳南县茅草街大桥的配制及应用情况

The introduce of mix proportion and application of concrete with long span concrete filled steel tube bridge of maocaojie in nanxian yiyang province

结合湖南省益阳市南县茅草街大桥的工程实际,着重论述怎样通过理论指导和试配实践来确定大跨径钢管拱主弦管C50自密实微膨胀泵送混凝土的原材料和配合比,以及怎样进行现场泵送时的质量控制。

In this paper based on the engineer practice in the bridge of Maocaojie in Hunan province, it is discussed how to determine the raw material and mix proportion of long span, self compacting slight expand and pumping concrete based on theory and on site test, and the key points of pumping concrete on site is also analyzed in this paper.