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http://dx.doi.org/10.5345/JKIBC.2016.16.1.025

Evaluation of the Exothermic Properties and Reproducibility of Concrete Containing Electro-conductive Materials  

Song, Dong-Geun (Department of Architectural System Engineering, Hanyang University)
Cho, Hyeong-Kyu (Department of Sustainable Architectural Engineering, Hanyang University)
Lee, Han-Seung (School of Architecture, Hanyang University)
Publication Information
Journal of the Korea Institute of Building Construction / v.16, no.1, 2016 , pp. 25-34 More about this Journal
Abstract
From 1990's, a study on the development of exothermic concrete, a concrete which electro-conductive material is mixed, has been proceeded. However, due to the difficulty of exothermic reproducibility of concrete specimen, the study has been unable to continuously carried out. Accordingly, this study was focused on developing an exothermic concrete for the purpose of snow-melting material. Cement paste and mortar specimens mixed with graphite, conductive metal powder and chemical admixture were made. The evaluation of exothermic performance and reproducibility was conducted under $-2^{\circ}C$ of low temperature. In addition, micro-chemical analysis was carried out to investigate a cause of exothermic reproducibility. As a test result, the specimen mixed with graphite and superplasticizer with air entrained showed the best exothermic performance and reproducibility. Through micro-chemical analysis, it is judged that polymer or methacrylic acid (MAA), the contents inside the superplasticizer with air entrained, gave exothermic reproducibility by generating the electrochemical reaction with graphite.
Keywords
graphite; electro-conductive; exothermic reproducibility;
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