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콜드조인트 발생에 따른 200MPA급 초고성능 콘크리트의 전단부착성능 평가 연구

Title
콜드조인트 발생에 따른 200MPA급 초고성능 콘크리트의 전단부착성능 평가 연구
Other Titles
An Study on Bonding Performance Evaluation of UHPC in Accordance with Delay Time of Cold Joints
Author
이한승
Keywords
초고성능 콘크리트; 콜드조인트; 전단부착강도; 직접전단시험; ultra-high-performance concrete; cold joint; bonding shear strength; direct shear test
Issue Date
2017-04
Publisher
대한건축학회
Citation
대한건축학회 2017년도 춘계학술발표대회논문집, v. 37, No. 1, Page. 757-758
Abstract
This study aims to derive the optimal condition that ensures the monolithicity of ultra-high performance concrete (UHPC), through the evaluation of bonding shear performance with respect to the time of cold joint occurrence during the placement. From the direct shear test, while the normalized bonding shear strength reduction of UHPC with the delay time of 15 minutes was the lowest at around 8%, a dramatic degradation of bonding shear performance was observed after 15 minutes. XRD analysis of the middle and surface sections was performed in order to analyze the composition of the thin film formed at the surface of UHPC, and as a result, the main ingredient appeared to be SiO2 from the XRD pattern of middle and surface sections, which is believed to be the result of the rising of SiO2-based filler, used as anadmixture in this study, toward the surface, due to its low specific gravity.
URI
http://www.dbpia.co.kr/Journal/ArticleDetail/NODE07178648http://repository.hanyang.ac.kr/handle/20.500.11754/103235
ISSN
2287-5786
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ARCHITECTURE(건축학부) > Articles
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