of the concrete volume, they have a tremendous effect on the properties of concrete. But in our country, it as been increasingly pointed out the shortage of good quality aggregates. Consumption of coarse aggregates are in its stableness by substituting the crushed stone. Meanwhile, many concrete production company had suffered from the shortage of river and silica sand. But it is necessary to find substituting aggregate because of the restriction of aggregate gathering in river and sea. The results of mortar flow test and concrete slump test, the mortar and concrete with silica sand and crushed sand are better fluidity than the ones of river sand. And the results of mortar test, compressive strength of mortar with crushed sand is higher than the one of river sand, silica sand. Also, the compressive strength of concrete with crushed sand is higher than the other. According to the use of silica sand have not a bad effect on concrete.
목차
Abstract 1. 서론 2. 실험개요 2.1 사용재료 및 물성 2.2 실험인자 및 수준 2.3 모르터 및 콘크리트 배합 2.4 측정항목 및 측정방법 3. 실험결과 및 고찰 3.1 굳지 않은 모르터 및 콘크리트의 물리적 특성 3.2 경화 모르터 및 콘크리트의 물리적 특성 4. 결론 참고문헌