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Title |
An Experimental Study on the Quality Properties of the Expansive for Dry-Shrinkage Compensation of the On-Dol Floor Mortar
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Keywords |
온돌바닥 모르터; 균열; 건조수축; 팽창재(CaO-CaSO₄) ; On-Dol floor mortar; crack; dry-shrinkage; expansive(CaO-CaSO₄) |
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Abstract |
In this paper, the properties of an expansive agent (CaO-CaSO₄) for dry shrinkage compensation were investigated by a series of experimental program, which might be used at On-Dol heating system as mortar type. The expansion principle of the CaO-CaSO₄ was mainly verified. As a result of this study, the correlation between the content of the expansive agent and the compressive strength was obtained in the form of exponential function(Y = A e-s), showing that as the content of expansive agent increased as the expansion performance with the compressive strength increased by only a certain amount. Also, as a results of the analysis of a correlation between the expansive performance and the chemical properties which generally accompanied a part of quality management in manufacturing the expensive cement, the expansive performance was relative to only the contents of the F-CaO among chemical properties(Blaine, +44㎛R, F-CaO, SO₃,L.O.I). And it was clarified that the results were relative to the second order function, showing that if the contents of the F-CaO increased the expansive performance Increased.d.
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