지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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PURPOSES : In this study, wasted vinyl aggregate, which possesses better thermal properties than natural aggregate, was used in cement concrete mixture to develop more economical concrete with thermal insulation and freeze prevention effects. METHODS : Slump and air content of the fresh concrete, which substituted its 0%, 5%, and 10% of coarse aggregate with wasted vinyl aggregate, were measured. Compressive strength, Poisson's ratio, elastic modulus, and splitting tensile strength of hardened concrete were measured by laboratory tests. Thermal properties of concrete such as coefficient of thermal expansion, thermal conductivity, and specific heat were also measured according to replacement ratio of wasted vinyl aggregate. Finally, the thermal insulation and freeze prevention effectiveness of the concrete mixed with wasted vinyl aggregate was confirmed through finite element analysis of road pavement crossing above concrete box culvert made from wasted vinyl aggregate. RESULTS : Even though the physical properties of wasted-vinyl-aggregate concrete such as compressive strength, Poisson°Øs ratio, elastic modulus, and splitting tensile strength were inferior to those of ordinary concrete, they met requirements for structural concrete. The thermal properties of concrete were improved by wasted vinyl aggregate because it decreased thermal conductivity and increased specific heat of the concrete. According to the result of finite element analysis, temperature variation in pavement subgrade was mitigated by box culvert made from wasted-vinyl-aggregate concrete. CONCLUSIONS : Through the laboratory test and finite element analysis of this study, it was concluded that the concrete structures made from wasted vinyl aggregate showed thermal insulation and freeze prevention effects.
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참고문헌 (14)
참고문헌 신청
ABAQUS / 2008 / Theory Manual Version 6.8. Hibbit / Hibbit, Karlesson & Sorensen, Inc
California DOT / 2008 / Highway Design Manual / California Department of Transportation
Hernandez-ortiz, J. P. / 2006 / Polymer Processing: Modeling and Simulation / Hanser Gardner Publications
KEC / 2009 / Standard Drawings for Expressway Construction / Korea Expressway Corporation
Kim, B. J. / 2014 / Laboratory Test of Material Properties and Field Test of Snow-melting Effect for Asphalt Concrete Mixed with Waste Vinyl Aggregates
California DOT / 2008 / Highway Design Manual / California Department of Transportation
Hernandez-ortiz, J. P. / 2006 / Polymer Processing: Modeling and Simulation / Hanser Gardner Publications
KEC / 2009 / Standard Drawings for Expressway Construction / Korea Expressway Corporation
Kim, B. J. / 2014 / Laboratory Test of Material Properties and Field Test of Snow-melting Effect for Asphalt Concrete Mixed with Waste Vinyl Aggregates
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