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.

Zhijing River Bridge is a concrete-filled steel tube deck arch bridge with a main span 430 m and the arch rings of the Bridge were filled with the C50 micro-expansion concrete by pumping.

This paper introduced the design and selection of mix ratio of micro-expansive concrete,and studied material,mix ratio,properties,construction technology of concrete,then built up high-performance expansive concrete that satisfied the requirement of practical engineering large-span flat arch bridge,the corresponding construction measure are put forward.

Basing on a comprehensive analysis of the current research situation in China and abroad, main problems, the types of expansive agent and the corresponding expansive mechanism of micro-expansive concrete.

During construction of the major dam of a reservoir, a new construction technique was adopted by using the micro expansive concrete with MgO mixed outside,in which the heat due to hydration was reduced.

Practical example of the preparation of C50 micro-expansive concrete;

The expansion and strength properties of expansive concrete at negative temperature and their mechanism;

Research on application of expansive concrete in the design of canal lining;

Mechanical behavior and microstructure feature of expansive concrete controlled in steel tube;