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국부부량(局部不良) 구조체(構造體) 콘크리트의 보강사례(補强事例)에 관한 연구(硏究)
尹起源 ( Yoon Gi Won ),李建哲 ( Lee Gun Cheol ),權永鎬 ( Kwon Young Ho ),金基喆 ( Kim Ki Cheol ),韓千求 ( Han Cheon Goo ) 한국구조물진단유지관리공학회 1997 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.1 No.1
Over weighing of AE agent in batcher plant caused by the breakdown of AE agent gauge meter and error of the weighing in AE agent has been reported sometimes. But it gives a rise to retard the strength development and damage the safety of structre. And especially, it is difficult to repair the structure that the concrete with over weigh AE agent were placed locally. Therefore, in this paper the repair technique of local impaired concrete caused by over weighing in AE agent are discussed.
슈미트햄머의 반발도와 초음파속도에 미치는 골재요인의 영향
김기정(Kim Ki-Jeong),이용성(Lee Yong Sung),이백수(Li Bai Shou),윤기원(Yoon Gi-Won),한천구(Han Cheon-Goo) 한국구조물진단유지관리학회 2003 한국구조물진단학회 학술발표회논문집 Vol.- No.-
This paper reports the influence of aggregate factors on estimation of compressive strength by non-destructive test. According to the results, in the case of basalt and limestone aggregate, the compressive strength and the rebound value of schmidt hammer is larger and smaller than in the case of granite aggregate respectively. And, as the influence of maximum size of aggregate, they are higher in the case of maximum size of 25mm than in the case of maximum size of 10 and 20mm. Ultrasonic pulse velocity is similar in the case of lime stone aggregate, but grows slow in the case of basalt aggregate compared with granite aggregate. But the influence of maximum size of aggregate on ultrasonic pulse velocity is minute. Estimating compressive strength by rebound hammer method, the same estimating expressions can be applied to the field since the kinds and maximum size of aggregate do not influence on estimation of compressive. But, as for estimation of compressive strength by ultrasonic pulse velocity method, compressive strength is estimated more highly by 10MPa in the case of basalt aggregate, but the influence of maximum size of aggregate is minute.