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Title |
Improvement of Durability and Change of Pore Structure for Concrete Surface by the Penetrative Surface Protection Agent
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Keywords |
합침계 표면보호재 ; 세공경 ; 세공분포 ; 내구성 향상 ; 콘크리트 표면 |
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Abstract |
Recently, surface finishing and protection materials were developed to restore performance of the deteriorated concrete and inhibiting corrosion of the reinforcing-bar. For this purpose, surface protection agent as well as coatings are used. Coatings have the advantage of low permeability of Co" So, and water. However, for coatings such as epoxy, urethane and acryl, long-term adhesive strength is reduced and the fanned membrane of those is blistered by various causes. Also when organic coatings are applied to the wet surface of concrete, those have a problem with adhesion. On the other hand, surface protection agent penetrates into pore structure in concrete through capillary and can make a dense micro structure in concrete as a result of filling effect. Furthennore, the chemical reaction between silicate from surface protection agent and cement hydrates can also make a additional hydration product which is ideally compatihle with concrete body. The aim of this study is to examine the effect of penetrative surface protection agent(SPA) by evaluating several concrete durability characteristics. The results show that the concrete penetrated surface protection agent exhibited higher durability characteristics for instance, carbonation velocity coefficient, resistance to chemical attack and chloride ion penetrarion than the plain concrete. These results due to formation of a discontinuous macro-pore system which inhibits deterioration factors of concrete by changed the pore structure (porosity and pore size distributions) of the concrete penetrated surface protection agent.
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