High performance concrete with high-strength and improved durability has brought new opportunities to the construction industry. However, some attention was given to characteristics of such concrete, in particular with respect to their cracking sensitivity. It has been argued and demonstrated experimentally that a low water/cement ratio concrete may undergoes shrinkage due to self-desiccation. If this shrinkage is restrained, the concrete may crack. This autogenous shrinkage cracking is a major concern for the durability and aesthetic of concrete structures. One possible method to reduce the adverse effects of cracking due to autogenous shrinkage is the addition of expansive additive. Tests conducted by many research have shown the beneficial effects of addition of expansive additive. However, much of the study on the this problem has been based on determination of free shrinkage strains. Yet, to assess the problem properly, stresses developed under restrained conditions should be evaluated. Only limited study has been done in this area. The purpose of this study was to evaluate mechanical behaviors of high performance concrete such as components of strain, shrinkage stress, creep and creep coefficient with and without expansive additive at early age. Finally, the paper discusses on the control of autogenous shrinkage cracking by means of expansive additive in high performance concrete. The result show the development stress of high performance concrete using expansive additive under simulated complete restrained condition at early age. Also, the tensile stress caused by restrained at high performance concrete using expansive additive is lower than that of normal high performance concrete.
목차
Abstract 1. 서론 1.1. 연구의 목적 2. 구속시험 2.1. VRTM의 개요 2.2. VRTM 시험기의 제어 플로우 3. 실험계획 및 방법 3.1. 실험계획 3.2. 사용재료 3.3. 콘크리트의 배합 3.4. 시험항목 4. 실험결과 및 고찰 4.1. 강도 및 탄성계수 4.2. 자기수축 5. 결론 참고문헌
대한건축학회지회연합회 [The Regional Association of Architectural Institute of Korea]
설립연도
2000
분야
공학>건축공학
소개
본회는 건축에 관한 학술․ 예술․ 기술을 연구 연마하는 지회회원들의 입지향상과 회원상호간의 친목도모와 함께 건축 문화창달에 기여함을 목적으로 한다.
목적을 달성하기 위하여 다음의 사업을 한다.
1. 지회회원의 입지향상과 친목도모
2. 건축에 관한 조사․연구지도 및 이에 관련된 사업
3. 회지, 논문집, 연구보고서 기타 건축에 관한 도서의 간행
4. 건축에 관한 강습회․강연회․간담회․전람회․견학회 등의 개최
5. 건축에 관한 계획, 감독, 기술검토에 대한 국가공공기관 기타의뢰에 관한 사항
6. 국내외 관계 제 학회와의 교류 및 회의참석
7. 기타 본회 목적달성에 필요한 사업
간행물
간행물명
대한건축학회연합논문집 [Journal of the Regional Association of Architectural Institute of Korea]