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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.11 No.3
- 발행연도
- 2017.9
- 수록면
- 513 - 524 (12page)
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초록· 키워드
오류제보하기
Proper curing of concrete is essential for achieving desirable mechanical properties. However, in a developing country like Bangladesh, curing is often neglected due to lack of proper knowledge and skill of local contractors. Consequently, general concreting work of the country has been found to have both strength and durability issues. Under such scenario, internal curing could be adopted using masonry chip aggregate (MCA) which is quite common in this region. It is observed that saturated MCA desorbs water under favorable relative humidity and temperature. This paper presents the effectiveness of MCA as internal curing medium and recommends a tentative optimum mix proportion to produce such concrete. The experimental study was conducted in two phases. It was found that 20% replacement of stone chips with MCA produced better performing internally cured concrete both in terms of strength and durability. Performance of internally cured concrete with recommended proportion of MCA is comparable to that of normally cured control concrete samples with conventional stone chips. In addition, internally cured concrete performed significantly better than control samples when kept under similar adverse curing conditions. In the absence of supply of external water for curing, compressive strength of internally cured concrete for 20% replacement can be as high as 1.5 times the strength of the control concrete samples. Significant better performance in permeability than that of control samples was also observed for this percent replacement under such adverse curing conditions.
목차
Abstract
1. Introduction
2. Experimental Investigation
3. Results and Discussion, Phase 1
4. Results and Discussion, Phase 2
5. Economics of Internal Curing
6. Conclusions
References
참고문헌 (41)
참고문헌 신청
Afroz, S., Rahman, F., Iffat, S., & Manzur, T. (2015). Sorptivity and strength characteristics of commonly used concrete mixes of Bangladesh. Proceedings of the International Conference on Recent Innovation in Civil Engineering for Sustainable Development (IICSD-2015) (pp. 39?44). Department of Civil Engineering, DUET, Gazipur.
ASTM C109/C109M?13. (2013). Standard test method for compressive strength of hydraulic cement mortars (Using 2-in. or [50-mm] Cube Specimens). West Conshohocken, PA: ASTM International.
ASTM C 496/C496M-11. (2011). Standard test method for splitting tensile strength of cylindrical concrete specimens. West Conshohocken, PA: ASTM International.
ASTM C1202?12. (2012). Standard test method for electrical indication of concrete’s ability to resist chloride ion penetration. West Conshohocken, PA: ASTM International.
ASTM C128?12. (2012). Standard test method for density, relative density (specific gravity), and absorption of fine aggregate. West Conshohocken, PA: ASTM International.
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UCI(KEPA) : I410-ECN-0101-2018-532-001249723