Earticle

초록

영어

The objective of this study is to investigate the effect of the replacement of electric oxidizing arc slag fine aggregates(EFA) on the autogenous shrinkage of high strength mortar with 80 MPa subjected to various curing temperatures and to estimate the autogenous shrinkage development by applying maturity method. EFA is replaced by limestone fine aggregates from 25%, 50% and 100%. Curing temperatures are fixed at 5℃, 20℃ and 35℃, respectively. Equivalent age is calculated based on ASTM C 1074 to estimate autogenous shrinkage development. Test results indicate that replacement of EFA resulted in an increase of compressive strength at 35 ℃, while it decreased compressive strength at 5℃. Autogenous shrinkage was reduced with increase of EFA replacement and this tendency is more clear when the specimens were cured at 35℃. This may be due to the presence of free-CaO in EFA. Non linear regression model based on Exponential growth curve was applied to estimate autogenous shrinkage with equivalent age. Predicted values had relatively good agreement with measured ones.

목차

Abstract
 1. 서론
 2. 실험계획 및 방법
  2.1 실험계획
  2.2 사용재료
  2.3 실험방법
 3. 실험결과 및 분석
  3.1 양생온도별 응결시간
  3.2 양생온도별 압축강도 증진
  3.3 양생온도별 자기수축 특성 및 해석
 4. 결론
 REFERENCES

저자

• 한민철 [ Han, Min-Cheol | 청주대학교 건축공학과 부교수, 공학박사 ] Corresponding author

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