APPLICATION OF SELF-CONSOLIDATING CONCRETE FOR BRIDGE REPAIR

摘要

A highway bridge in province Shanxi was constructed during a hot summer, which leads to serious concrete defects. A Grade C60 self-consolidating concrete (SCC) was designed to repair the defects. This paper describes the design, testing and construction of the self-consolidating concrete. Experimental results indicated that the use of two types of sand with different modulus of fineness could produce SCC mixtures with excellent workability of concrete. The sand with lower modulus of fineness was needed in the case of no thickening agent was added. Quick and efficient construction is very important to self-compacting concrete in order to retain the flowability of SCC, especially at high temperature season.Moist curing is also very important for obtaining good quality and durability of concrete.