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http://dx.doi.org/10.5855/ENERGY.2019.28.1.017

Characterization of Shrinkage Reducing Type Cement Carbon Dioxide-reducible CSA Synthesis  

Cho, Yong-Kwang (Environment Materials Team, Hanil Cement CO.Ltd.)
Nam, Seong-Young (Environment Materials Team, Hanil Cement CO.Ltd.)
Kim, Chun-Sik (Environment Materials Team, Hanil Cement CO.Ltd.)
Cho, Sung-Hyun (Environment Materials Team, Hanil Cement CO.Ltd.)
Lee, Hyoung-Woo (Environment Materials Team, Hanil Cement CO.Ltd.)
Ahn, Ji-Whan (Center for Carbon Mineralization, Korea Institute of Geosceinces and Mineral Resources)
Publication Information
Journal of Energy Engineering / v.28, no.1, 2019 , pp. 17-21 More about this Journal
Abstract
Calcium sulfaluminate (CSA) was synthesized to improve the shrinkage of OPC. In this study, the setting time, the compressive strength and the length change ratio were confirmed by replacing the synthesized CSA with OPC by 10% and 13% by 16%. In the case of shrinkage-reducing type cement, formation of Ca-Al-$H_2$-based hydrate was activated. Therefore, the setting time was shortened. The compressive strength of the shrinkage - reducing type cement is comparable to that of OPC after 7 days' strength. However, shrinkage reducing type cement showed improved initial strength compared to OPC. The length change ratio was found to be improved by drying shrinkage from -0.075% to -0.047% on the 28th day.
Keywords
Cement; drying shrinkage; calcium sulfaluminate;
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