[논문]셀룰로오스 나노섬유 혼합 방오코팅제가 도포된 콘크리트의 소수성능과 내구성능 평가

장낙섭; 노치훈; 오홍섭

doi:10.11112/jksmi.2023.27.5.1

셀룰로오스 나노섬유 혼합 방오코팅제가 도포된 콘크리트의 소수성능과 내구성능 평가
Evaluation of Hydrophobic Performance and Durability of Concrete Coated with Cellulose Nanofiber Mixed Antifouling Coating Agent 원문보기

한국구조물진단유지관리공학회 논문집 = Journal of the Korea Institute for Structural Maintenance and Inspection, v.27 no.5, 2023년, pp.1 - 8

장낙섭 (경상국립대학교 건설시스템공학과) , 노치훈 (경상국립대학교 건설시스템공학과) , 오홍섭 (경상국립대학교 건설시스템공학과)

초록
AI-Helper

해양 및 수리구조물은 수분침투뿐만 아니라 해양의생물의 부착 등에 의해서도 내구손상이 발생하게 된다. 따라서 본 연구에서는 해양 콘크리트 등을 위해 자가세척기능을 갖는 방오 코팅제를 개발하고자 하였다. AKD와 셀룰로오스 나노섬유 및 BADGE를 혼합한 방오코팅제를 접촉각 140°내외의 소수성과 기울임각 15°에서 충분한 방오성능 확보한 것으로 확인하였다. 표면의 내마모성 시험에서는 최대 0.015g의 손실만이 발생하는 것으로 나타났다. 내구성 실험에서도 염소이온투과시험결과 코팅제가 도포된 변수에서는 염소이온의 투가가 거의 발생하지 않았으며, 탄산화와 동결융해 손상 또한 역시 거의 발생하지 않아 콘크리트의 내구성 확보에서도 효과가 있는 것으로 분석되었다.

Abstract ▼ AI-Helper

Marine and hydraulic structures are subject to durability damage not only due to the penetration of sea water but also due to the attachment of marine organisms. Therefore, in this study, we tried to develop an antifouling coating agent with self-cleaning function for marine concrete. It was confirmed that the antifouling coating agent mixed with AKD, cellulose nanofibers and BADGE had sufficient antifouling performance at a well hydrophobicity of around 140° in contact angle and an inclination angle of 15°. In the abrasion resistance test of the surface, only a maximum loss of 0.015 g occurred. In the durability test, as a result of the chloride ion permeation test, almost no chloride ion permeation occurred in the variable where the coating agent was applied, and carbonation and freeze-thaw damage also rarely occurred, so it was analyzed that it was effective in securing durability of concrete.

주제어

표/그림 (15)

그림 Fig. 1 Schematic representation of self-cleaning processes (reproduced of Nishimoto and Bhushan, 2013)
표 Table 1 Mixing ratio of developed cellulose antifouling coating agent
그림 Fig. 2 TGA plot of the mass loss of CNF and AKD
그림 Fig. 3 XRD plot of the mass loss of CNF and AKD
표 Table 2 Material properties of CNF, AKD and BADGE
그림 Fig. 4 FT-IR Plot of CNF, AKD and BADGE
그림 Fig. 5 Contact angle and test apparatus
표 Table 3 Concrete mix proportion for durability test
표 Table 4 Contact angle by droplet test on the cement paste
그림 Fig. 6 Taber abrasion test on antifouling coating agent
표 Table 5 Sliding test results by water droplet on cement paste
표 Table 6 Test results of taber abrasion amount of antifouling coating agent on plastic surface
표 Table 7 Chloride ion penetrability of antifouling coated concrete based on the charge passed
표 Table 8 The depth of carbonation of concrete speciemns coated with and without developed antifouling coating(unit : mm)
그림 Fig. 7 Carbonation measurement on upper side of coated and uncoated concrete samples

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