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내화피복재를 도포한 고강도 콘크리트 부재의 온도이력 평가
민충식 ( Min Choong-sic ),김규용 ( Kim Gyu-yong ),미야우치히로유키 ( Miyauchi-hiroyuki ),이태규 ( Lee Tae-gyu ),이광준 ( Lee Gwang-jun ) 한국구조물진단유지관리공학회 2010 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.14 No.1
In this study, We calculate that optimum thickness of coating is 2.8~3.5mm measured results in preliminary experiments with small specimens. Which in the member of short collum by applying, compares with member of short collum mixed with fibers' results and evaluation of fire resistance. Thickness of coating 2.8mm member occurred spalling within lhour, Temperature history of 3.5mm member is 100°C lower than mixed with fibers. However, we found Spalling phenomena at corner of member, and suggest that prevent Spalling a minimum thickness of coating that offers more than 3.5mm.
철근매입에 의한 고강도 콘크리트의 자기수축 응력 특성 평가
구경모 ( Koo Kyung-mo ),김규용 ( Yam Gyu-yong ),미야우치히로유키 ( Miyauchi Hiroyuki ),이의배 ( Lee Eui-bae ),신경수 ( Shin Kyoung-su ) 한국구조물진단유지관리공학회 2010 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.14 No.1
Autogenous shrinkage of high-strength mass concrete is affected high temperature history. So to evaluate autogenous shrinkage of high-strength mass concrete accurately, thermal expansion in it should be removed. In this study, compensated autogenous shrinkage was calculated after gathering thermal expansion coefficient at early age experimentally. Therefore, this study evaluated autogenous shrinkage stress by embedded rebar on the high strength concrete used by test.
바탕모르타르 균열부의 탄산화에 미치는 표면마감재의 $CO_2$ 투과성능의 영향
미야우치 히로유키,구경모,최경철,김규용,박연진,신경수,Hiroyuki, Miyauchi,Koo, Kyung-Mo,Choe, Gyeong-Choel,Kim, Gyu-Yong,Park, Yeun-Jin,Shin, Kyoung-Su 대한건축학회 2012 대한건축학회논문집 Vol.28 No.3
The purpose of this study is to investigate the carbonation resistance of building coating materials applied to the mortar or concrete substrate including their cracked zone. The testing parameters for this experiment were the three crack widths in the substrate including non-crack, and two types of the coating materials. As results, the coating materials have good carbonation resistance against $CO_2$ penetration into mortar substrate even in cracked zone of substrate. Furthermore, the carbonation resistance of coating material was calculated by using their $CO_2$ permeability coefficient and discussed from viewpoint of durability design.
열반사.단열시트를 적용한 다층복합방수시스템의 단열성능 평가
미야우치 히로유키,윤용상,구경모,미야우치 카오리,송재승,김규용,Miyauchi, Hiroyuki,Youn, Yong-Sang,Koo, Kyung-Mo,Miyauchi, Kaori,Song, Jae-Seung,Kim, Gyu-Yong 대한건축학회 2011 대한건축학회논문집 Vol.27 No.10
A multi-layered waterproofing membrane system with thermal reflection-insulation performance was developed and its insulation performance was evaluated experimentally. The thermal insulating performance of this system was obtained by the following measurement parameters in outdoor exposure test and artificial indoor test; the specimen size-effect, the difference of exposed concrete substrate and the types of waterproofing membrane. As a result, the temperature amplitude in testing chamber is lower than the traditional membrane system and this system had high thermal insulating performance in summer season or high temperature. Then, the thermal conduction performance of this system was measured by the artificial temperature cyclic test in order to evaluate its performance conveniently and its result showed good correlation with outdoor test result. Therefore, it is expected that the thermal insulation performance of various waterproofing membrane system can analyze by this simple test method and propose green roof effectively.