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건축 단열재의 장기 경년변화에 따른 열전도율 변화에 관한 실험 연구 Ⅱ
최현중,정영선,김경우,강재식,이승언 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1
The objective of this study is to test for thermal conductivity of architecture insulation materials in domestic buildings with environmental condition change. In study, we measured change of thermal conductivity with test temperature change, long-time leaving and change of contained water rate. For long-time leaving test, the specimens of building insulation materials were kept in test conditions, which were influenced by the outside environment. The results of the study show 1) the contained water rate of artificial mineral fiber insulations was big for others, 2) thermal conductivity rose as test temperature(median) grew up and 3) the extruding insulations and hardened Urethane foam changed thermal conductivity with environmental condition and time elapse.
최현중(Hyun Jung Choi),허정호(Jung Ho Huh),강재식(Jae-Sik Kang),최경석(Gyeong-Seok Choi),안호상(Hosang Ahn) 한국생활환경학회 2021 한국생활환경학회지 Vol.28 No.2
In this study, lon-term aging of XPS (Extruded PolyStyrene) and Rigid poly urethane was experimentally observed by two step process to verify correction factors. Continuous measurement over 5,300 days was performed in first step by checking thermal conductivity change. In 2<SUP>nd</SUP> step process, 360 day-time-lapse monitoring was executed. As a result, it was degraded for special grade and grade 1 XPS by 30% from the original thermal conductivity for 1,000 day-time-lapse and 20 to 25% for grade 2 XPS. In case of Rigid poly urethane, degradation from the initial ratio was found to be 23 to 29% after 5,000 days. Based on these results, correction factors were calculated and suggested to have 0.7, 0.75, and 0.8 for special grade XPS, grade 1 XPS, and Rigid poly urethane, respectively.