ABSTRACT
This chapter focuses on surface-impregnation materials and coating agents that would not change the appearance of concrete. It investigates the applicability of these agents in the conservation of historical reinforced concrete (RC) buildings. In Japan, ‘Keeping the original structure’ is advertency when con-serving and repairing historical buildings. The surface-coating agents showed relatively high gloss levels. In contrast, the surface-impregnation materials except K-1, K-2, and AKN exhibited close values to reference concrete without treatment. Glossiness reduced overall after the accelerated carbonation test and heat and moisture deterioration test. The National Museum of Western Art (NMWA) was constructed in 1959 with concrete design strength of 18 MPa. The NMWA is an important cultural landmark of Japan. An approach towards to conserve a historical RC building in Japan was introduced.
