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http://dx.doi.org/10.4334/JKCI.2006.18.4.517

Flowability and Strength Properties of Mortar and Self-Compacting Concrete Mixed with Waste Concrete Powder  

Choi, Yun-Wang (Dept. of Civil Engineering, Semyung University)
Jung, Moon-Young (Dept. of Earth Resource & Environmental Geotechnics Engineering, Semyung University)
Moon, Dae-Joong (NECT Co., Ltd)
Kim, Sung-Su (Dept. of Civil Engineering, Semyung University)
Publication Information
Journal of the Korea Concrete Institute / v.18, no.4, 2006 , pp. 517-526 More about this Journal
Abstract
In this study, in order to utilize waste concrete powder(WCP) which is occurred in manufacturing high quality recycled aggregate as an admixture for self-compacting concrete(SCC), the properties of cement paste, mortar, and concrete that were mixed two types of WCP, 928 and 1,360 $cm^2/g$ of surface area, were analyzed. As a result of experiment, we have found that WCP was a porous material with angle. When WCP was utilized as an admixture for SCC, its flowability and viscosity increased in proportion to the increase of a replacement ratio, and that a replacement ratio of WCP was proper within 15%. The compressive strength at 28 days mixed respectively with WCP2, 15 and 30%, showed about 36 and 28 MPa, and it showed a similar trend with a function suggested in CEB-FIP for the relationship of compressive strength and elastic modulus. According to the results, it is judged that WCP2 can be utilized as an mineral admixture of normal strength SCC.
Keywords
waste concrete powder; self-compacting concrete; flowability; viscosity; compressive strength;
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