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pp.127-135
PURPOSES : In this study, high-viscosity grout for increasing ground stiffness is developed using industrial byproducts.
METHODS : Based on literature review, the viscosity and viscosity expression time of domestic and foreign anti-washout admixture underwater were evaluated. In addition, grout was prepared by mixing 5% to 40% of fly ash (FA) in a standard mixture. Flow, setting time, and compressive strength tests were conducted to evaluate the quality of the grout.
RESULTS : Experimental results show that the viscosity required is 35,000 to 40,000 cps, whereas the viscosity expression time required exceeds 300 min. As the amount of FA used for grouting increases, the physical and mechanical performances deteriorate. The strength of a test specimen manufactured underwater is lower than that of a test specimen manufactured under air, and the decrease on day 28 is lower than that on day 3. The FA applied to the grout should be less than 20%.
CONCLUSIONS : Although industrial byproducts, which exhibit high viscosity, offer excellent mechanical performance and are thus suitable as a solidifying agent for strengthening grout, their application in the field must be evaluated.
1. 서론
2. 고점도 그라우트
2.1. 그라우트 공법
2.2. 고점도 그라우트 재료특성
3. 실험개요
3.1. 사용재료
3.2. 실험 방법
3.3. 사용배합
4. 실험결과
4.1. 수중불분리성 혼화재료 선정
4.2. 그라우트 흐름시험 평가
4.3. 응결시험 결과
4.4. 압축강도
5. 결론
REFERENCES
