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싸이클론을 적용한 건식 생산공정으로 생산된 재생 잔골재의 품질 및 모르터 특성에 관한 연구
이세현(Lee Sea-Hyun),심종우(Shim Jong-Woo) 대한건축학회 2004 大韓建築學會論文集 : 構造系 Vol.20 No.6
This study is intended for how to utilize the recycled fine aggregate which is produced by concrete wastes.<br/> It analyzes the quality of the fine aggregate which is reproduced through a dry production process with cyclone, and<br/> comprehends the characteristics of mortar using the recycled fine aggregate to review whether it can be put to practical use for<br/> concrete. The conclusions of the study are as follows<br/> 1. The recycled fine aggregate through the dry production process with cyclone shows the low rate of absorption and<br/> impurity content after the cyclone process. It shows that its density is 2.37, absorption rate is 4.8 and stability is 5.1% and less.<br/> Therefore, it satisfies the standards of KS F 2573(recycled aggregate for concrete) as the first grade.<br/> 2. Compared to the mortar made from natural fine aggregate, another using recycled one reduces the flow when the rate of<br/> mix increases. The mortar of the 100% recycled fine aggregate reduces the flow to the maximum 15% comparing to that of<br/> 100% natural one.<br/> The compressive strength of mortar using the dry recycled fine aggregate tends to be reduced according to the increase of<br/> the mixing rate of recycled fine aggregate at the beginning, but as time passes, it shows that the compressive strength of<br/> mortar using the recycled fine aggregate is fall off to that of natural one as the increase of mixing rate of fine aggregate.<br/> Based on the above results, the recycled fine aggregate through the dry production process with cyclone satisfies the quality<br/> standards of the first-grade recycled fine aggregate of KS F 2573 (recycled fine aggregate for concrete) and it is concluded that<br/> the recycled fine aggregate can be used as fine aggregate because its characteristics are similar to the natural one when the<br/> mortar is produced.