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http://dx.doi.org/10.5345/JKIC.2009.9.1.043

A Study on the Optimum Amount of Waste Foundry Sand and Flyash in Concrete  

Yang, Joo-Kyoung (청운대학교)
Moon, Young-Ho (한국과학기술정보연구원)
Publication Information
Journal of the Korea Institute of Building Construction / v.9, no.1, 2009 , pp. 43-47 More about this Journal
Abstract
The most of waste foundry sands(WFS) have been discarded. It is very urgent for our country to make a study on recycling of WFS. The one of recycling method of WFS is using them as fine aggregate for concrete. This study provided the optimum amount of WFS and flyash when WFS and flyash were used together in concrete. The concrete made with 60% WFS fine aggregate replacement showed higher compressive strength, splitting tensile strength and modulus of elasticity than normal concrete. In the case that the flyash and WFS are replaced together, the compressive strength and splitting tensile strength were improved at flyash replacement ratio $10%{\sim}20%$ and WFS replacement ratio $40%{\sim}60%$. The increase of WFS and flyash replacement led lower air content. While the increase of WFS replacement led lower slump, the increase of flyash replacement led higher slump.
Keywords
waste foundry sands; flyash; compressive strength; splitting tensile strength; modulus of elasticity;
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