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한국건축시공학회 / v.7, no.4, 2007년, pp.145-151 
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혼화재 종류 변화에 따른 저온조건하 콘크리트의 초기강도 발현 특성
( Strength Development of the Concrete at Early Age subjected to Low Temperature depending on Admixture Types ) |
| 한민철; 청주대학교 건축공학부;
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| 초 록 |
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| In this paper, tests are carried out in order to investigate the strength development of concrete under various binder types, W/B and curing temperature ranged from $5{sim}20^{circ}C$. Fly ash and blast furnace slag were incorporated by as much as 30%, respectively. Strength development of concrete are estimated using Logistic model and strength ratio of concrete at 28days to that at early age are also investigated. According to experimental results, it is found that good agreements are obtained between measured values and calculated ones using logistic model below $20^{circ}C$. Strength ratio of concrete at 28days to that at early age increases in case W/B decreases and curing temperature increases. Tables and graphs for strength ratio of concrete are provided in this paper. It is capable of obtaining and predicting the periods to attain design strength by considering increment factor of strength easily with the table and graphs presented in this paper. This paper presents the reference data to decide removal time of form, time to reach target strength and strength inspection of remicon whether the test specimens meet the specified criteria of compressive strength. Multi regression models with respect to the relationship between 7days compressive strength and 28 days compressive strength depending on W/B and admixture types are presented. |
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| 키워드 |
| 강도증진;적산온도;로지스틱모델;강도비;혼화재;Strength Development;Maturity;Logistic Model;Strength Ratio;Admixture; |
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한국건축시공학회지 / v.7, no.4, 2007년, pp.145-151
한국건축시공학회
ISSN : 1598-2033
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200709906198740)
언어 : 한국어 |
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| 논문 제공 : KISTI 한국과학기술정보연구원 |
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