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Title |
Performance Evaluation of Chloride and Sulfate Removal using Anion Exchange Resin in Saturated Ca(OH)2 Solutions
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Authors |
이윤수(Yun-Su Lee) ; 진정심(Zheng-Xin Chen) ; 이한승(Han-Seung Lee) |
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DOI |
https://doi.org/10.11112/jksmi.2017.21.2.146 |
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Keywords |
염소이온 제거 ; 이온교환수지 ; 자기치유 기술 ; 황산이온 제거 Chloride removal ; Ion exchange resin ; Self-healing technology ; Sulfate removal |
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Abstract |
Recently, self-healing concrete has been researched as maintenance and repair of concrete structures are important challenges we face. This paper focused on possibility of ion exchange resin as a novelty material directly and actively controlling harmful ions of concrete, whereas most self-healing concrete researches have been focused on methods to automatically filling and repairing internal crack of concrete. Because equilibrium properties between ion exchange resin and harmful ion is important before design of cement mixing proportion, it was conducted to remove chloride or sulfate in saturated Ca(OH)2 solutions containing NaCl or Na2SO4. The removal performance was analyzed using kinetic equation and isothermal equation. Consequently, the removal properties of anion exchange resin were relatively more dependent on pseudo second reaction equation and Langmuir equation than pseudo first reaction equation and Freundlich equation. And it was concluded that each chloride and sulfate can be removed to the maximum 1068 ppm and 1314 ppm.
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