|
Title |
Effect of Concrete Strength on Chloride Ion Penetration Resistance and Chemical Resistance of Concrete Coated by Siloxane-based Water Repellent
|
|
Authors |
박명주(Myung-Joo Park) ; 이병재(Byung-Jae Lee) ; 김정수(Jung-Soo Kim) ; 김윤용(Yun-Yong Kim) |
|
DOI |
https://doi.org/10.4334/JKCI.2018.30.6.583 |
|
Keywords |
실록산계 흡수방지재 ; 염소이온침투저항성 ; 내화학성 ; 콘크리트 강도 siloxane-based water repellent ; chloride ion penetration resistance ; chemical resistance ; concrete strength |
|
Abstract |
In this study, effect of concrete strength on chloride ion penetration resistance and chemical resistance of concrete coated by siloxane-based water repellent (SWR). Experiments on the effect of strength on penetration depth revealed that penetration depth is deeper as the strength is lower. SWR penetrated more than 3 mm of the desired depth from the surface of the three types of concrete. As a result of the evaluation of the water absorption resistance and the water permeability, it was found that it satisfies the requirement of 0.1 as given in KS F 4930 under all strength conditions. SWR-coated concrete was tested to show improved chloride penetration resistance compared to plain concrete. As a result of comparing the degree of improvement of chlorine ion penetration resistance, 18 MPa concrete was more than 2 times better than 30 MPa concrete. SWR-coated concrete showed improved chemical resistance compared to plain concrete. The degree of this effect was smaller than the improvement effect of chlorine ion penetration resistance. All the results of these experiments indicated that the effect of SWR-coating on chloride ion penetration resistance and chemical resistance of concrete was found to be higher as the concrete strength decreased in the limited strength condition of this study.
|