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공경록,강헌찬 東亞大學校 附設 環境問題硏究所 2004 硏究報告 Vol.26 No.-
This study research the method that it will be able to increase the demand of the quality of the construction waste and recycled aggregate. It includes a test for sieve analysis of aggregate, a test for specific gravity, a test for absorption, a test for impurity contents and crisis effect of cement paste of recycled aggregate. The grain size change of the 13~45mm recycled aggregate by the crusher when moving toward the 2nd cone crusher from the 2nd jaw crusher, the content change from 6.69% changed with 55.34%. The recycled aggregate of 13~45mm includes a standard grain size distribution. A test of impurity contents was resulted 1.49%. Density of the recycled aggregate of 13~45mm was 2.14g/㎤ and water absorption ratio was 7.74%. Content of the aggregate where the cement paste sticks below 50% changed 8.35% → 12.68% → 13.76% → 23.61% → 23.67% when first jaw crusher → second jaw crusher → first cone crusher → double screen → recycled aggregate of 13~45mm. The crisis of the recording aggregate which will be rough the crusher and the cement paste goes well. For the recycled aggregate production of quality the development of the system which separates the recycled aggregate is necessary.