한국구조물진단유지관리공학회 논문집 (Journal of the Korea institute for structural maintenance and inspection)

  • 제22권6호
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  • Pages.16-23
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  • 2018
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  • 2234-6937(pISSN)
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  • 2287-6979(eISSN)
한국구조물진단유지관리공학회 (Korea Institute for Structural Maintenance Inspection)
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PDMS 흡수방지재를 적용한 SHCC의 압축강도 및 염화물이온 침투저항성

Compressive Strength and Chloride Ion Penetration Resistance of SHCC Coated by PDMS-based Penetrating Water Repellency

  • 투고 : 2018.06.26
  • 심사 : 2018.10.29
  • 발행 : 2018.11.01
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초록

본 연구에서는 표면 침투 및 코팅형 흡수방지재인 Polydimethylsiloxane(PDMS)을 고인성 섬유복합체(ECC)에 적용하여 적용성, 강도 평가 및 염화물이온 침투 저항성능에 대한 연구를 수행하였다. PDMS 적용 방법에 따른 침투깊이를 분석한 결과 모든 방법에서 KS F 4930 의 기준을 만족하는 것을 확인하였다. 적용 방법 중, 침지 방법이 가장 우수한 침투깊이를 보였으나 현장적용성을 고려할 경우 스프레이 방법이 적용 가능한 것으로 확인되었다. ECC 배합에 따른 PDMS 침투깊이 실험 결과 배합강도가 감소할수록 침투깊이는 최대 70% 이상 증가하는 경향을 나타났다. 압축강도 시험 결과에서는 PDMS 침투 깊이가 큰 M4-A, M4-B 시험체의 압축강도는 PDMS를 적용하지 않은 M4 시험체와 비교하여 9.6%, 8.0% 압축강도가 감소하였다. 또한, 침투깊이가 작은 M1-A와 M1-B 시험체의 압축강도는 M1 시험체와 비교하여 4%, 2.2% 감소하여 PDMS 침투깊이가 클수록 강도감소율이 증가하였다. 염소이온침투 저항성능 평가 시험결과, PDMS의 침투깊이가 클수록 염소이온 침투 저항성능이 향상되는 것을 확인하였다.

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.

키워드

참고문헌

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