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http://dx.doi.org/10.5345/JKIBC.2019.19.6.539

An Experimental Study on a Performance Evaluation of Internal Insulation of Buildings Over 20 Years Old  

Kim, Hyun-Jin (Korea Land & Housing Corporation)
Choi, Se-Jin (Department of Architectural Engineering, Wonkwang University)
Publication Information
Journal of the Korea Institute of Building Construction / v.19, no.6, 2019 , pp. 539-547 More about this Journal
Abstract
Recently, the international community signed a climate change agreement to prevent global warming. Yet currently, the fossil fuels have been widely used in to supply building energy for cooling and heating. The Green Building certification (G-SEED), an energy efficiency rating for new or existing buildings requires that buildings meet certain conditions. Insulation is used as a building material to reduce the energy supply to buildings and to improve the thermal insulation, and it accounts for more than 90% of the total heat resistance provided by the building surface components that meet the energy-saving design standards of new buildings. In this investigation, a performance evaluation study was conducted through an experimental study by directly extracting the foam polystyrene insulation on-site during the remodeling of a building that was in the range of 22~38 years old. Through tests, it was found that the thermal conductivity of the extrusion method insulation (XPS) was reduced by 48% and the compressive strength of XPS decreased by 36% compared to KS M 3808, which is the initial quality standard. For bead method insulation (EPS) with a thickness of 50mm, the thermal conductivity, the compressive strength, and flexural failure load were similar to the initial quality standard. Therefore, in the calculation of the primary energy requirement per unit area per year, the performance of bead method insulation can be estimated simply by considering the thickness of the insulation, while a correction factor that considers its performance deterioration should be applied when extrusion method insulation is used.
Keywords
insulation materials; energy-saving; old building; thermal conductivity; compressive strength; G-SEED;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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