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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.15 No.6
- 발행연도
- 2021.11
- 수록면
- 751 - 759 (9page)
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초록· 키워드
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This research aimed to present the improvement of the cementitious material in high-volume fly ash using only one alkali activator. Fly ash was used as a partial replacement for Portland cement type I, varying from 0 to 60% by weight of the binder. Concentrations of NaOH varying from 0.00 to 1.25 molar were used as alkali activator. Paste properties and mortar compressive strength at the ages of 3, 7, 14, 28, 60, and 90 days of water curing were investigated. The results reveal that fly ash paste with an alkali activator provides shorter initial setting time when compared to control paste without alkali activator. The use of 0.50 molar NaOH concentration in mortar containing fly ash not exceeding 50% by weight of binder provides the highest compressive strength at any age of curing. At that concentration, there is a significant increase in the 28-day compressive strength of up to 45% over that of the control mortar. In addition, higher NaOH concentration (not exceeding 1.00 molar) has a significant positive effect on the compressive strength of mortar with higher fly ash content, especially over longer curing periods.
목차
Abstract
1. Introduction
2. Experimental Program
3. Results and Discussion
4. Conclusions
References
참고문헌 (31)
참고문헌 신청
2014 / ASTM C305-14, Standard Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency / ASTM International
2016 / ASTM C187-16, Standard Test Method for Amount of Water Required for Normal Consistency of Hydraulic Cement Paste / ASTM Internat
2019 / ASTM C191-19, Standard Test Methods for Time of Setting of Hydraulic Cement by Vicat Needle / ASTM International
2019 / ASTM C618-19, Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete / ASTM International
2020 / ASTM C150/C150M-20, Standard Specification for Portland Cement / ASTM International
2016 / ASTM C187-16, Standard Test Method for Amount of Water Required for Normal Consistency of Hydraulic Cement Paste / ASTM Internat
2019 / ASTM C191-19, Standard Test Methods for Time of Setting of Hydraulic Cement by Vicat Needle / ASTM International
2019 / ASTM C618-19, Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete / ASTM International
2020 / ASTM C150/C150M-20, Standard Specification for Portland Cement / ASTM International
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