| 摘要 |
PROBLEM TO BE SOLVED: To provide a water absorption preventive material forming a deep penetration layer of alkylalkoxysilane and/or its condensate on the surface layer part of a civil engineering and building material in application to it for giving a high water repellant property and preventing penetration of a deterioration factor such as water and salt for the long term. SOLUTION: This water absorption preventive material for the civil engineering and building material comprises alkylalkoxysilane and/or its condensate (A), organic bentonite (B) formed by bringing montmorillonite to reaction with quaternary ammonium ions and having 33-50% of ignition loss at 1,000°C, a polar solvent (C), and hydrophobic silica powder (D). COPYRIGHT: (C)2009,JPO&INPIT
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