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지하 콘크리트구조물의 열화 억제에 의한 내구성 증진에 관한 연구
천병식(Cheon Byeong Sig),최춘식(Choe Chun Sig),정원우(Jeong Won U) 한국지반공학회 2004 한국지반공학회논문집 Vol.20 No.3
Normally, coating is used for protecting reinforced concrete. For this purpose. both organic and inorganic coatings are used. The advantages of inorganic coatings are lower absorption of UV, non-burning etc. On the other hand, organic coatings have the advantage of low permeability of CO₂, SO₂and water. Organic coatings provide better protection for reinforced concrete, However, organic coatings such as epoxy, urethane and acryl reduce long-temi adhesive strength by the difference of their thermal expansion coefficients and elastic inodulus from those of concrete, and the formed coating cover of these is blistered by poor breathing. Also, when organic coatings are applied to the wet surface of concrete, they have a problem with adhesion. In this study, a new coating inaterial for protecting concrete was hybridized with polymer and ceramics. And tests were carried out on its physical and durable characteristics, and safety characteristic on elution. All results were compared with organic coating inaterials and epoxies and showed that the performance of the developed coating material was not inferior to that of other organic coatings in protecting concrete. On the other hand, safety characteristic on elution was superior to epoxies which were used i n this study. So, the developed coating material was considered as a suitable protecting coating material which have advantages of inorganic and organic coatings for protecting underground concrete structures, especially in contact with water.
ScienceON
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