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Appl. Sci. 2017, 7(9), 910; doi:10.3390/app7090910

Properties of Extrusion Concrete Panel Using Waste Concrete Powder

1
Department of Architectural Engineering, Kongju National University, 275 Cheonan-daero, Cheonan City, Chungcheongnam-do 330-717, Korea
2
Building and Urban Research Institute, Korea Institute of Civil Engineering and Building Technology, Ilsanseo-gu, Goyang 411-712, Korea
3
School of Architecture, Seoul National University of Science & Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Korea
*
Author to whom correspondence should be addressed.
Received: 30 July 2017 / Revised: 25 August 2017 / Accepted: 31 August 2017 / Published: 5 September 2017
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Abstract

There has been an increasing amount of waste concrete generated in recent years, which has made recycling more important. Waste concrete is generally recycled as recycled aggregates, and many studies have been conducted to seek ways to improve their quality. Such quality improvement processes has led to the generation of byproducts such as waste concrete powder, which needs to be recycled efficiently based on further research. Accordingly, this study was conducted with the aim to use waste concrete powder (WCP) to substitute silica powder in the manufacturing of the extrusion concrete panels in cases where high SiO2 content is not a requirement. The results of this study showed a negative correlation between flexural strength and silica powder-WCP substitution ratio. For example, 50% substitution resulted in a product that satisfied the required flexural strength over 14 MPa as stipulated by the Korean Industrials Standards, and it gave rise to properties such as specific gravity, absorption ratio, length change, thermal conductivity, and fire-resistance that were similar to those of plain specimens. Based on these results, it was deemed that it would be possible to use WCP as an alternative material in place of siliceous fillers in cases where high-purity is not required. View Full-Text
Keywords: waste concrete; waste concrete powder; extrusion panel; concrete panel; recycling; silica powder waste concrete; waste concrete powder; extrusion panel; concrete panel; recycling; silica powder
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Kim, H.-S.; Lee, S.-H.; Kim, B. Properties of Extrusion Concrete Panel Using Waste Concrete Powder. Appl. Sci. 2017, 7, 910.

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