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http://dx.doi.org/10.5659/JAIK_SC.2015.31.7.11

A Study on the Mechanical Properties of Concrete Using Recycled Coarse Aggregates at High Temperatures  

Shin, Woo-Cheol (금오공과대학교 건축학부)
Lee, Ho-Kyung (금오공과대학교 건축학부)
Baek, Seung-Min (금오공과대학교 건축학부)
Kim, Woo-Suk (금오공과대학교 건축학부)
Kwon, Woo-Hyun ((주)케이엔지니어링)
Kwak, Yoon-Keun (금오공과대학교 건축학부)
Publication Information
Journal of the Architectural Institute of Korea Structure & Construction / v.31, no.7, 2015 , pp. 11-18 More about this Journal
Abstract
The main purpose of this study is to investigate on residual mechanical performance of recycled coarse aggregate concrete (RCAC), after being subjected to high temperatures. In this experiment, a control concrete mix made with natural coarse aggregates and two concrete mixes with RCA replacement ratio of 15% and 30% were designed. Specimens were exposed for a period of $1^{\circ}C/min$ to temperatures of $20^{\circ}C$, $200^{\circ}C$, $400^{\circ}C$, $600^{\circ}C$ and $800^{\circ}C$. After cooling down to ambient temperature, the following basic mechanical properties were then evaluated and compared with reference values obtained prior to thermal exposure: (i) Residual compressive strength; (ii) Residual splitting tensile strength; (iii) Residual flexural strength; (iv) Elastic modulus; (v) SEM analysis & XRD analysis. In addition, XRD and SEM Images analyses were performed to investigate chemical and physical characteristics of RCAC.
Keywords
Recycled Coarse Aggregate; High Temperature; Mechanical Properties; Residual Strength; Residual Elastic Modulus; SEM Analysis; XRD Analysis;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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