Development of High Penetration Agent and its Application to Concrete Bridge Deck Waterproofing, Repair and Reinforcement

This paper presents the newly developed high penetration agent for use in waterproofing, repair and reinforcement of deteriorated concrete bridge decks, which are mainly caused by fatigue cracking and penetration of water into the crack. Comparing to the ordinary permeable agent, the high permeability agent has a relatively low viscosity at low atmospheric temperature, hence, it can fully penetrate into small cracks even in cold season. Moreover, the flexural stiffness of deteriorated concrete bridge deck could be increased at approximately 25%, indicating that the high penetration agent can be applied not only for waterproofing but also for repair and reinforcement work. Recently, the high permeability agent has been widely adopted together with the asphalt waterproofing membrane (two-coat waterproofing system) in the actual maintenance work of concrete bridge deck in the Metropolitan Expressway and other highway bridges in Japan.