Table 1 Type of polymeric coating materials Fig. 2 Results of suppressive effects of polymeric coating materials on the progress of neutralization of concrete. Table 2 Evaluation of the suppressive effects of polymeric coating materials on neutralization of concrete

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Fig.3 Schematic diagram of the concept of equivalent thickness of cover concrete taking into account of the suppressive effects of polymeric coatings on the neutralization of concrete.

Table 3 Results of evaluation of the progress of corrosion of reinforcing steel in neutralized concrete under accelerated condition (50 Ž, 95% RH) Table 4 Results of evaluation of the progress of corrosion of reinforcing steel in neutralized concrete under outdoor exposure not sheltered from rain Fig.4 Schematic diagram of the concept of equivalent corrosion loss of crack occurrence taking into account of the suppressive effects of polymeric coatings on the progress of corrosion of reinforcing steel in neutralized concrete. Journal of Materials Life Society, Vol.13, No.3 129

Fig.5 Concept of setting the physical service life of reinforced concrete components considering the suppressive effects of surface finishing materials.

10) Martin, J.: J. AppL Poly. Sci., 29, pp. 777-794 (1984) 11) Fukushima, T.: Durability Build. Mater., 1, 327-343 (1986) 14) Smolczyk, H.G.: Proc. Interntl. Sym. Chem. Cem. Tokyo, Japan, 3, 369-382 (1968) 2) Hamada, M.: Proc. Interntl. Sym. Chem. Cem., Tokyo, Japan, 3, 343-369 (1968) 3) Scieessl, J.: Deutcher Ausschuss fur Stahlbeton, 255, 27-83 (1976) Journal of Materials Life Society, Vol. 13, No.3

Influence of Polymeric Coating Materials on Physical Service Life of Reinforced Concrete Toshio FUKUSHIMA* *De partment of Environmental Space Design, Faculty of Environmental Engineering, The University of Kitakyushu Hikikino, Wakamatsu-ku, Kitakyushu-shi, Fukuoka-ken, 808-0135 Japan) Abstract Physical service life of steel reinforced concrete (RC) components and buildings in the ordinary atmospheric surroundings is reasonably determined by the time when the occurrence of crack and spalling of cover concrete makes serious damage to the daily safety as the results of the progress of neutralization of concrete and the accompanying corrosion of reinforcing steel. If we make effective use of polymeric coating materials, however, the physical service life can be prolonged by their suppressive effects against the progress of neutralization and corrosion. I propose the rational setting methods of physical service life of reinforced concrete treated with polymeric coating materials based upon the concept of equivalent thickness of cover concrete and also equivalent corrosion loss of crack occurrence. Keywords: Polymeric coating material, Steel reinforced concrete (RC), Physical service life, Suppressive effects against neutralization, Suppressive effects against corrosion, Maintenance and repair method, Prolongation, Durability design [Journal of Materials Life Society, 13 [3] 124-132 (July 2001)]