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Title |
Compressive Strength and Chloride Ion Penetration Resistance of SHCC Coated by PDMS-based Penetrating Water Repellency
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Authors |
이준희(Jun-Hee Lee) ; 현정환(Jung-Hwan Hyun) ; 박수현(Su-Hyun Park) ; 김윤용(Yun-Yong Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2018.22.6.016 |
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Keywords |
PDMS ; 흡수방지재 ; SHCC ; 압축강도 ; 염소이온침투저항성 PDMS ; Penetrating water repellency ; SHCC ; Compressive strength ; Chloride ion penetration resistance |
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Abstract |
In this study, Polydimethylsiloxane (PDMS) was applied to Strain Hardening Cement Composites (SHCC) for penetrating water repellency. The penetration depth of PDMS, strength of SHCC, and chloride ion penetration resistance of SHCC were investigated. As a result of measuring penetration depth of PDMS when applying different application method, it was confirmed that all methods satisfied the requirements of KS F 4930. Although the immersion method showed the largest penetration depth, the spray method was considered to be more appropriate considering the ease of field application. Compressive strength tests showed that the penetration depth of PDMS decreased as the compressive strength of SHCC increased. The compressive strength of M4-A and M4-B specimens with large PDMS penetration depths decreased by 9.6% and 8.0%, respectively, compared with those of M4 specimens produced without PDMS. Compressive strengths of the M1-A and M1-B specimens with small PDMS penetration depths were reduced by 4% and 2.2%, respectively, compared with the M1 specimen. As a result, it can be seen that the strength reduction rate of SHCC increases as the penetration depth of PDMS increases. The chlorine ion penetration tests showed that the chlorine ion penetration resistance increases with the penetration depth of PDMS.
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