부순모래의 미립분이 콘크리트의 품질에 미치는 영향

Recently, the use of crushed sand produced by the crushing of stone is continuously increasing to reach an utilization rate of about 20% of the whole fine aggregates that is foreseen to grow larger in the future. However, the lack of recognition concerning quality during the production of crushed sand results in the use of crushed sand that do not satisfy the KS F 2527 standard during the manufacture of concrete. And, studies investigating the effects of such crushed sand on concrete are still neglected. Therefore, this study intends to provide data that can be exploited for concrete using crushed sand through the analysis of the effects of the fine particles of crushed sand on the quality of concrete. Results revealed problems in the workability, air entraining and durability for a value of 7% for the amount passing sieve 0.08 ㎜ specified by the current KS F 2527. It can be analyzed form this study that the quality of concrete used crushed of the 5% for the amount passing sieve 0.08 ㎜ will improved.