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http://dx.doi.org/10.5345/JKIBC.2019.19.2.123

A Study on the Shrinkage Cracking Properties of Concrete by Using Blast Furnace Slag Cement and Frost-Resistant Accelerator  

Choi, Hyeong-Gil (Graduate School of Architecture, Kyungpook National University)
Choi, Hee-Sup (Department of Civil and Environmental Engineering, Kitami Institute of Technology)
Publication Information
Journal of the Korea Institute of Building Construction / v.19, no.2, 2019 , pp. 123-130 More about this Journal
Abstract
As a cold-weather-concrete construction technique for enhancing the sustainability and improving efficiency of cold-weather construction, the cracking timing, the starting point of deterioration for concrete, due to the shrinkage of the blast furnace slag cement concrete including accelerator was evaluated. As a result, by using blast furnace slag and accelerator, the cracking was developed faster with higher cracking potential under the restrained conditions at constant age and free-shrinkage strain. It can be considered that the results of decreased stress relaxation by creep or increased restraint with increased free-shrinkage strain causes the increased cracking development speed. Hence, it should be considered the necessary of cracking due to the shrinkage when blast furnace slag or accelerator was used for cold-weather construction.
Keywords
blast furnance slag cement; frost-resistant accelerator; shrinkage; cracking; stress relaxation; degree of restraint;
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