Study on the Filling Ability of Self-Compacting Concrete in Steel-Concrete Composite Structure

Abstract

In the construction of steel-concrete composite structures, the use of self-compacting concrete is effective because the compacting with vibrator is generally impossible. In this case, it is necessary to avoid the formation of excessive gaps between steel and concrete due to the initial subsidence and shrinkage of concrete. This paper describes the influences of the kinds of cements and admixtures on initial subsidence and gaps formed under the diaphragms. Furthermore, the effectiveness of pressing place method to reduce the amount of gap is discussed. As a result, it is found that subsidence behavior and the amount of gap under the diaphragm differ considerably depending on the kinds of self-compacting concrete. In addition, it is found that the pressing place method is useful to reduce the amount of subsidence and gap formed under the diaphragm.