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Research Article

Experimental Study on Material Property and Long-term Behavior of Low-Cement Concrete

저시멘트 콘크리트의 재료특성 및 장기거동에 대한 실험 연구

Dong Bin Kim1
,
Hong-Gun Park2*
,
Hyeon-Jin Kim3
,
Ho-Jun Lee4
김 동빈1
,
박 홍근2*
,
김 현진3
,
이 호준4
1Staff, SEN Engineering Group, Seoul, 07226, Rep. of Korea
2Professor, Department of Architecture and Architectural Engineering, Seoul National University, Seoul, 08826, Rep. of Korea
3Postdoctoral Researcher, Department of Architecture and Architectural Engineering, Seoul National University, Seoul, 08826, Rep. of Korea
4Senior Researcher, POSCO Steel Solution Research Laboratory, Incheon, 37745, Rep. of Korea
1센구조연구소 사원
2서울대학교 건축학과 건축학부 교수
3서울대학교 건축학과 건축학부 박사 후 연구원
4포스코 철강솔루션연구소 구조연구그룹 선임연구원
*Corresponding Author
13 February 2025. pp. 46-57
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Abstract

This study investigated the material properties of low-cement concrete, as a fundamental study for application in protective facilities that combine structual safety and eco-friendly construction. Two types of slag cement were considered for low-cement concrete: one with a conventional 50 % replacement of ordinary Portland cement (OPC) by slag and the other with a higher 60 % replacement of OPC by using alkali activator. In general, concrete cylinder tests showed that the compressive strength, Poisson's ratio, and splitting tensile strength of all low-cement concrete were similar to those of the concrete cylinders made with 100 % OPC. However, the slag cement concrete with greater OPC replacement showed better performance at long-term compressive strength. For long-term axial loading tests, specimen made of newly developed cement showed better performance in both creep and shrinkage than specimen made of OPC and conventional slag cement. Further, deformations measured from creep and shrinkage agreed with the predictions of existing design codes.

Keywords
Low-cement Concrete
Creep
Shrinkage
Long-term behavior
Compressive strength

본 연구는 구조안전성과 친환경성을 갖춘 방호시설에 저시멘트 콘크리트를 적용가능성을 평가하기 위한 기초적 연구로서, 저시멘트 콘크리트의 재료 특성을 평가하였다. 저시멘트 콘크리트에는 두 가지 유형의 슬래그 시멘트를 적용하였는데, 하나는 일반 포틀랜드 시멘트(OPC)의 50 %를 슬래그로 대체한 기존 혼합이고, 다른 하나는 알칼리 활성제를 사용하여 OPC의 60 %를 대체한 고대체율 혼합이다. 모든 LCC의 재료 성능(압축강도, 푸아송 비, 쪼갬인장강도)은 100 % OPC 콘크리트와 유사한 수준을 보였다. 장기적으로는 고대체율 슬래그 시멘트 콘크리트가 압축강도에서 우수한 성능을 나타냈으며, 크리프와 수축 성능에서도 기존 OPC 및 슬래그 시멘트를 사용한 콘크리트를 능가하였다. 또한, 크리프 및 수축 변형은 기존 설계기준과 비교적 잘 부합하였다

키워드
저시멘트 콘크리트
크리프
수축
장기거동
압축강도
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Information
  • Publisher :Korea Protective Facility Institute
  • Publisher(Ko) :한국방호시설학회
  • Journal Title :Protective Facility
  • Journal Title(Ko) :방호시설
  • Volume : 2
  • No :1
  • Pages :46-57
  • Received Date : 2025-01-22
  • Accepted Date : 2025-01-23
  • DOI :https://doi.org/10.23310/PF.2025.2.1.046
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