서지주요정보
양생온도와 양생시점에 따른 콘크리트 강도예측에 관한 연구 = Prediction of concrete strength with different curing temperature and time
서명 / 저자 양생온도와 양생시점에 따른 콘크리트 강도예측에 관한 연구 = Prediction of concrete strength with different curing temperature and time / 문영호.
저자명 문영호 ; Moon, Yeong-Ho
발행사항 [대전 : 한국과학기술원, 1999].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8009460

소장위치/청구기호

학술문화관(문화관) 보존서고

DCE 99001

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Over the past several decades, many researchers have emphasized the prediction of the early-stage strength gain of concrete. Such a prediction is of special importance for cold-weather and hot-weather concreting and for massive concrete members. In spite of extensive research done over the past decades, there are still several problems in quantitatively predicting the strength development at both early and later ages. In this experimental and analytic research for strength prediction of early-age strength, the strength development for various curing histories was investigated with a particular regard to the influences of curing time points with given temperatures. For this purpose, four different points of curing time were considered with an individual interval of 24 hours. Two different temperatures of 5℃ and 40℃ were applied for the selective intervals while the rest period days were under the reference curing condition of 20℃. A new model for the strength prediction was suggested based on the rate constant model. In this model, the equivalent ages introduced in the Saul and Arrhenius models were modified in order to show the effects of curing temperature at different ages. Test results show that the concrete subjected to a high temperature at an early-age attains higher early-age strength but eventually attains lower later-age strength. The concrete subjected to a low temperature at early age leads to lower early-age strength but almost the same later-age strength. Moreover, the proposed model showed better agreement with the test results than the existing models. A strength prediction model to improve the later-age strength with curing temperatures was proposed. In order to verify the proposed model, the existing data which had been reported was used. The effects of diffusion barrier with curing temperature during hydration on later-age strength were considered using rate constant model. The verification of the model was performed by regression analysis, in which the existing data were converted to the relative ratio of 28-day strength with 8 average curing temperatures in a range of -0.6~59.7℃. It was found that the temperature influence factors, such as rate constant, limit strength and reaction exponent were expressed in function of curing temperature. The results of regression analysis showed that the proposed model was higher in reliability than the previous model. Especially, the proposed model had the higher accuracy at later-age meanwhile it made no significant difference from previous model at young-age.

서지기타정보

서지기타정보
청구기호 {DCE 99001
형태사항 ix, 139 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Yeong-Ho Moon
지도교수의 한글표기 : 김진근
지도교수의 영문표기 : Jin-Keun Kim
학위논문 학위논문(박사) - 한국과학기술원 : 토목공학과,
서지주기 참고문헌 : p. 115-121
주제 콘크리트
양생 온도
적산온도
강도 예측
Concrete
Curing temperature
Maturity
Strength prediction
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