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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.8 No.4
- 발행연도
- 2014.12
- 수록면
- 315 - 326 (12page)
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초록· 키워드
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This study evaluates the dosages of Class F fly ash, lithium nitrate and their combinations to suppress the excessive expansion caused by alkali?silica reactivity (ASR). In order to serve the proposed objective, the mortar bar specimens were prepared from (1) four dosages of Class F fly ash, such as 15, 20, 25 and 30 % as a partial replacement of Portland cement, (2) up to six dosages of lithium nitrate, such as lithium-to-alkali molar ratios of 0.59, 0.74, 0.89, 1.04, 1.19 and 1.33, and (3) the combination of lithium salt (lithium-to-alkali molar ratio of 0.74) and two dosages of Class F fly ash (15 and 20 % as a partial replacement of Portland cement). Percent contribution to ASR-induced expansion due to the fly ash or lithium content, test duration and their interaction was also evaluated. The results showed that the ASR-induced expansion decreased with an increase in the admixtures in the mortar bar. However, the specimens made with the both Class F fly ash and lithium salt produced more effective mitigation approach when compared to those prepared with fly ash or lithium salt alone. The ASR-induced expansions of fly ash or lithium bearing mortar bars by the proposed models generated a good correlation with those obtained by the experimental procedures.
목차
Abstract
1. Introduction
2. Research Significance
3. Experimental Program
4. Results and Discussions
5. Conclusions
References
참고문헌 (31)
참고문헌 신청
1. [학술지(정기간행물)] - Berra, M / 2003 / Use of lithium compounds to prevent expansive alkali–silica reactivity in concrete / Advances in Cement Research 15 (4) : 145 ~ 154
2. [학술지(정기간행물)] - Be'rube´, M. A / 1993 / Canadian experience with testing for alkali–aggregate reactivity in concrete / Cement & Concrete Composites 15 : 27 ~ 47
3. [학술지(정기간행물)] - Brough, A. R / 1996 / Alkali activation of reactive silicas in cements: In situ 29Si MAS NMR studies of the kinetics of silicate polymerization / Journal of Materials Science 31 : 3365 ~ 3373
4. [학술지(정기간행물)] - Collins, C. L / 2004 / Examination of the effects of LiOH, LiCl, and LiNO3 on alkali–silica reaction / Cement and Concrete Research 34 : 1403 ~ 1415
5. [학술대회논문] - Durand, B / 2000 / More results about the use of lithium salts and mineral admixtures to inhibit ASR in concrete / Proceedings of the 11th international conference on alkali–aggregate reaction : 623 ~ 632
2. [학술지(정기간행물)] - Be'rube´, M. A / 1993 / Canadian experience with testing for alkali–aggregate reactivity in concrete / Cement & Concrete Composites 15 : 27 ~ 47
3. [학술지(정기간행물)] - Brough, A. R / 1996 / Alkali activation of reactive silicas in cements: In situ 29Si MAS NMR studies of the kinetics of silicate polymerization / Journal of Materials Science 31 : 3365 ~ 3373
4. [학술지(정기간행물)] - Collins, C. L / 2004 / Examination of the effects of LiOH, LiCl, and LiNO3 on alkali–silica reaction / Cement and Concrete Research 34 : 1403 ~ 1415
5. [학술대회논문] - Durand, B / 2000 / More results about the use of lithium salts and mineral admixtures to inhibit ASR in concrete / Proceedings of the 11th international conference on alkali–aggregate reaction : 623 ~ 632
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UCI(KEPA) : I410-ECN-0101-2016-532-001074326