Influence on the Autogenous and Drying Shrinkage of High Performance Concrete by Mineral Admixture

고성능 콘크리트의 자기 및 건조수축에 미치는 혼화재의 영향

This study is intended to investigate the influence of mineral admixtures on the autogenous and drying shrinkage of high performance concrete. According to results, drying shrinkage increases with increase of fly ash content, and it does not show difference with replacement of blast furnace slag powder. It increases when incorporating silica fume or fly ash and silica fume together. The autogenous shrinkage shows increasing tendency with increase of silica fume and blast furnace slag powder content, and incorporating of silica fume or fly ash and silica fume together has effects on reducing autogenous shrinkage. Therefore, it is considered that application of both silica fume and fly ash can reduce the cracks caused by autogenous shrinkage, including enhancement in strength and placeability of high performance concrete.