Earticle

초록

영어

The objective of the paper is to propose the correction factors of the concrete using blended cement at the stage of designing specified strength under low temperature environment. Strength development of the concretes using blended cements are estimated applying equivalent age methods. Ordinary Portland cement(OPC), fly ash cement(FAC), blast furnace slag cement(BSC) and ternary blended cement with FA and BS are used for the binders. Compressive strengths are measured using the concretes cured at 5, 20 and 35℃. Test results indicated that the use of blended cement led to decrease in strength development at 5℃ at early age. Strength correction factors with each level of age and binder types were suggested with 3 MPa levels. OPC, FAC and ternary blended cement had 3 MPa of strength correction factors for 28 days and 42 days of strength management period, while there are no need at 56 days and 91 days. BSC concrete had 3~6 MPa of strength correction factors from 28 days to 42 days. Within the scope of this study, strength correction factors should be added to Korea Construction Standard to secure design strength of the structural concrete cured at low temperature.

목차

Abstract
1. 서론
2. 기온보정강도 관련 규정의 변천 과정
3. 실험계획 및 방법
3.1 실험계획
3.2 사용재료
3.3 실험 방법
4. 실험결과 및 분석
4.1 굳지 않은 콘크리트의 특성
4.2 양생온도 및 결합재별 콘크리트의 강도증진
4.3 등가재령에 의한 강도증진 해석
4.4 결합재 종류별 양생온도에 따른 기온보정강도 제안
5. 결론
REFERENCES

저자

• 한민철 [ Han, Min-Cheol | 청주대학교 건축공학과 교수, 공학박사 ]
• 이영준 [ Lee, Young-Jun | 청주대학교 건축공학과 석사과정 ] Corresponding Author

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