국내산 부순모래의 품질에 관한 실태조사 연구 ( A Research Study on the Properties of Crushed Sand in our Country )

Recently, natural river sand has been used up and the quality of natural river sand gradually get worse. But, crushed sand, as the replacement of nature river sand, can be used as fine aggregates met good quality and economical cost for concrete if further investigation about mixing design is taken. Therefore, in this study we began our study by sampling the quality of crushed sand in our country. According to the investigation of quality of crushed sand in our country, although the quality of most crushed sand such as grain distribution, net shape ratio get worse, it can be improved by recognizing the quality control through manufacturing.