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윤용상 ( Yun Yong-sang ),미야우치히로유키 ( Miyauchi Hioryuk ),김규용 ( Kim Gyu-yong ),남정수 ( Nam Jung-soo ),구경모 ( Koo Kyung-mo ) 한국구조물진단유지관리공학회 2010 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.14 No.1
Concrete is contraction in the early hydration, and construction problems caused by cracks in the concrete carbonation promotes anger. eventually rapidly degrades the durability of buildings. In order to suppress the construction of this solid is an extremely effective method. . In this study, based on the type of finish and performance evaluation inhibit carbonation, crack size, measured by the soft temper, building performance for the duration of the basic research was done.
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.
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.