拉萨河特大桥主桥钢管混凝土配合比试验

Mix Proportioning Tests for Concrete Filled into Steel Tubes of Main Bridge of Lhasa River Bridge

拉萨河特大桥主桥钢管拱钢管及腹板填充C50微膨胀混凝土,采用泵送法施工。介绍对C50钢管混凝土进行的配合比试验,并研究其限制膨胀率等各项性能,以确定钢管内C50微膨胀混凝土的配合比。

The C50 micro-expansion concrete is filled into the steel tube arches and webs of the main bridge of Lhasa River Bridge by pumping construction. In this paper, the tests for mix proportioning of the C50 concrete are presented and various behaviors that can restrict expansion rate of the concrete are also studied in order to determine the mix proportioning of the concrete for the tube arches and webs.