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Title |
Strength Development of Sulfur-Polymer-Based Concrete Surface Protecting Agents Depending on Curing Condition and Hazard Assessment of Sulfur Polymers
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Authors |
이병재(Byung-Jae Lee) ; 이의성(Eue-Sung Lee) ; 김성구(Seung-Gu Kim) ; 김윤용(Yun-Yong Kim) |
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DOI |
http://dx.doi.org/10.11112/jksmi.2015.19.1.139 |
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Keywords |
유황폴리머 ; 콘크리트 표면보호재 ; 강도 ; 유해물질 ; 양생조건 Sulfur polymer ; Concrete surface protecting agent ; Strength ; Hazard assessment ; Curing condition |
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Abstract |
The amount of by-product from sulphur increases in domestic industrial facilities. However, the amount of its consumption is limited so that the amount of unused sulphur continues to increase. Therefore, in this study, the use sulfur polymer as the concrete surface protecting material was conducted. The compressive strength showed that as the substitution ratio of filler increased up to 40%, the compressive strength also increased. A high compressive strength was shown at the curing temperature of 40℃ (SS, FA) and 60℃ (OPC) according to the type of filler. The difference of compressive strength between air dry curing and water curing was insignificant so that there was no significant influence of moisture during curing process. The evaluation result of bond strength showed that the highest bond strength was shown at the air-dry condition of 40℃ regardless of type of filler. Bonding didn't occur properly during water curing in comparison to air dry curing. Also, in case of the specimen cured at 60℃, discoloration and hair cracks appeared due to the influence of temperature, and the highest bond strength was shown at the substitution ratio of 20% (SS, FA) and 30% (OPC) according to the type of filler. The releasing test result of harmful substance showed that no harmful substance was released, so there is no harmfulness in the surface protecting material using sulfur polymer. As a conclusion drawn in this study, it is most appropriate to substitute silica by approximately 20%, mix and cure at the air-dry condition of 40℃ in order to use sulfur polymer as the surface protecting material.
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