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http://dx.doi.org/10.4334/JKCI.2002.14.2.137

Strength Estimation Model of Early-Age Concrete Considering Degree of Hydration and Porosity  

황수덕 (성균관대학교 토목환경공학과)
이광명 (성균관대학교 토목환경공학과)
김진근 (한국과학기술원 토목공학과)
Publication Information
Journal of the Korea Concrete Institute / v.14, no.2, 2002 , pp. 137-147 More about this Journal
Abstract
Maturity models involving curing temperature and curing ages have been widely used to predict concrete strength, which can accurately estimate concrete strength. However, they may not consider physical quantities such as the characteristics of hydrates and the capillary porosity of microstructures associated with strength development. In order to find out the effects of both factors on a strength increment, the hydration model and the estimation method of the amount of capillary porosity were established, and the compressive strength test of concrete nth various water/cement ratios was carried out considering two test parameters, curing temperature and curing age. In this study, by analyzing the experimental results, a strength estimation model for early-age concrete that can consider the microstructural characteristics such as hydrates and capillary porosity was proposed. Measured compressive strengths were compared with estimated strengths and good agreements were obtained. Consequently, the proposed strength model can estimate compressive strength of concrete with curing age and curing temperature within an acceptable error.
Keywords
degree of hydration; porosity; compressive strength; early-age; curing temperature.;
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