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http://dx.doi.org/10.5345/JKIBC.2021.21.3.181

Quality of Dry Cement Mortar for Floor Heating Depending on Water-to-Dry Mortar Rutio  

Park, Sang-Jun (Department of Architecture, Korea Polytechnic University)
Hwang, Yin-Seong (R＆D Center, Asia Cement CO., LTD.)
Lee, Gun-Cheol (Department of Architectural Engineering, Korea National University of Transportaion)
Kim, Jong (Department of Architectural Engineering, Cheongju University)
Publication Information
Journal of the Korea Institute of Building Construction / v.21, no.3, 2021 , pp. 181-188 More about this Journal
Abstract
In this study, the various performance of dry cement mortar for Korean floor heating system depending on water-to-dry mortar ratios (W/DM) applied in project site was evaluated. According to the experiment conducted, the importance of mixing water for dry cement mortar was revealed by resultant performance or quality of the dry cement mortar for floor finishing by changing W/DM controlled in project site by workers. As the general trend, the flow was increased, and the unit volume weight was decreased with increasing W/DM. Additionally, compressive strength and drying shrinkage were significantly influenced by W/DM. Hence, it can be stated that the adding water for dry cement mortar should be managed precisely since excessively increased W/DM for workability improvement can cause performance degradation of floor mortar with the failures such as excessive bleeding, and severe segregation during the fresh state. As a summary of the study, to achieve a desirable performance of dry cement mortar, approximately 20 % of W/DM can be suggested to be managed in project site.
Keywords
floor heating system; dry cement mortar(DM); water-to-dry mortar ratio (W/DM); field management; flow;
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