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http://dx.doi.org/10.4334/JKCI.2010.22.5.617

Effects of Expansive Admixture on the Mechanical Properties of Strain-Hardening Cement Composite (SHCC)  

Lee, Young-Oh (Dept. of Architectural Engineering, Chungnam National University)
Yun, Hyun-Do (Dept. of Architectural Engineering, Chungnam National University)
Publication Information
Journal of the Korea Concrete Institute / v.22, no.5, 2010 , pp. 617-624 More about this Journal
Abstract
This paper reports on a comprehensive study on the mechanical properties of expansive fiber-reinforced strainhardening cement composite (SHCC) materials containing various replacement levels (0, 8, 10, 12 and 14%) of an expansive admixture and 1.5% polyethylene (PE) fibers volume fraction. A number of experimental tests were conducted to investigate shrinkage, compressive strength, flexural strength, and direct tension behavior. Test results show that as expected, the different replacement levels of an expansive admixture have an important effect on the evolution of the free shrinkage of SHCC with a rich mixture. At the volume fraction of 1.5%, PE fibers in normal SHCC reduce free shrinkage deformation by about 30% in comparison to plain mortar. The replacement of an expansive admixture in SHCC material has led the SHCC to a better initial cracking behavior. Enhanced cracking tendency improved mechanical properties of SHCC materials with rich mixtures. Note that an increase in the replacement of expansive admixture from 10% to 14% does not lead to a significant improvement for mechanical properties; this implies that the replacement of 10% expansive admixture is sufficient.
Keywords
expansive admixture; strain hardening cement composite; shrinkage; reinforcing fiber;
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Times Cited By KSCI : 4  (Citation Analysis)
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1 Cosson, D. and Hoogeveen, T., “Internal Curing of High-Performance Concrete with Pre-Soaked Fine Lightweight Aggregate for Prevention of Autogenous Shrinkage Cracking,” Cement and Concrete Research, 2008, Vol. 38, pp. 757-765.   DOI   ScienceOn
2 이현수, 한동엽, 한천구, 박문서, “팽창재 및 수축저감제가 강섬유보강 초고성능 시멘트 모르타르의 기초적 특성과 수축저감에 미치는 영향,” 대한건축학회 논문집 22 권, 12호, 2006, pp. 97-104.
3 박완신, 윤현도, 전에스더, 남상현, “섬유의 혼입이 변형 경화형 시멘트 복합체에 미치는 영향,” 대한건축학회 논문집, 25권, 11호, 2009, pp. 29-36.
4 윤현도, 김용철, 김선우, “보강섬유 종류에 따른 변형경화형 시멘트 복합체의 거동특성,” 대한건축학회 논문집, 24권, 5호, 2008, pp. 141-148.
5 Dong, J. K., Naaman, A. E., S., El-Tawil, “Comparative Flexural Behavior of Four Fiber Reinforced Cementitious Composites,” Cement & Concrete Composite, No. 30, 2008, pp. 917-928.   DOI   ScienceOn
6 Li, V. C., “Large Volume, High-Performance Applications of Fiber in Civil Engineering,” Journal of Applied Polymer Science, Vol. 83, 2002, pp. 660-686.   DOI   ScienceOn
7 박완신, 윤현도, 전에스더, “PET 합성섬유의 혼입조건에 따른 시멘트 복합체의 변형경화 특성,” 대한건축학회 논문집, 2008, 24권, 10호, pp. 37-44.
8 Li V. C., Wang S., and Wu C., “Tensile Strain-Hardening Behavior of Polyvinyl Alcohol Engineered Cementitious Composites (PVAECC),” ACI Material Journal, 2001, Vol. 198, No. 6, pp. 483-492.
9 Sato, Y., Fukuyama, H., and Suwada, H. A., “Proposal Tension-Compression Cyclic Loading Test Method for Ductile Cementitious Materials,” Journal of Structures and Construction, AIJ, 539, 2001, pp. 7-12.
10 김윤용, 고인성 섬유복합모르타르 ECC(engineered cementitious composites)의 구조물 적용,” 한국복합재료학회, 추계학술발표대회 논문집, 2006, pp. 281-284.
11 김진근, 하기주, 김윤용 외 11명, “고인성, 고내구성 신섬유복합 모르타르 및 구조물 보수/보강 신기술 개발,” 한국건설교통기술평가원, 2006, 788 pp.
12 한천구, 반호용, 전병채, 신연구, “팽창재 혼입률 변화에 따른 콘크리트의 특성에 관한 연구,” 대한건축학회 논문집, 14권, 5호, 1998, pp. 349-354.
13 윤현도, 양일승, 한병찬, Hiroshi Fukuyama, 전에스더, 문연준, “복합섬유 보강 고인성 시멘트 복합체의 특성,” 대한건축학회 춘계 학술발표대회 논문집, 24권, 1호, 2004, pp. 27-30.