Creep Characteristics of Artificial Lightweight Aggregate Concrete and Prediction Model

descriptionPublicationkeyboard_double_arrow_right Article 31 Oct 2018 English Publisher:Korea Concrete InstituteJournal:Journal of the Korea Concrete Institute, volume 30, pages 517-524 (issn: 1229-5515, eissn: 2234-2842,

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Authors: Keum-Il Song; Kyung-Ho Lee; Keun-Hyeok Yang; Jin-Kyu Song;

doi: 10.4334/jkci.2018.30.5.517

Creep Characteristics of Artificial Lightweight Aggregate Concrete and Prediction Model

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Abstract

인공경량골재를 사용한 경량콘크리트(LWAC)의 건조수축과 크리프 변형 특성을 평가하기 위해 인공경량 잔골재의 치환율과 콘크리트의 강도를 조정한 10배합의 콘크리트 시험체를 제작하였다. 크리프와 건조수축양을 측정한 결과 천연모래 치환율이 높을수록 건조수축량이 크게 나타났으며, 기본크리프계수는 한국콘크리트학회(KCI-2012)에서 제시하는 모델식보다 많게는 1.5배 이상 크게 평가되었다. 본 연구에서는 잔골재의 조립률, 콘크리트 밀도 및 강도를 고려한 수정예측모델을 제시하였으며, 기존 모델보다 LWAC의 크리프 거동을 더 정확하게 예측하였다.

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