Abstract
Surface protection ability of specimens consisted of mortar and four kinds of silane penetrant both treated at 5°C, 20°C and 60°C, respectively, was measured after three days curing period. In the case of penetrating depth, it became long when the silane temperature was 5°C and the mortar temperature was raised. On the other hand, it became shot when the mortar temperature was 5°C and the silane temperature was raised. As for the ability defined by ratios of permeability, absorption, carbonation depth and chloride-ion penetration, it improved when the silane temperature was 5°C and the mortar temperature was raised. When the mortar temperature was 5°C and the silane temperature was raised, the ability defined by them declined.
