STUDY OF BONDING PERFORMANCE OF THE WATERPROOFING MATERIAL FOR CONCRETE BRIDGE DECKS

Bonding behaviour is one of the important performances of waterpoofing material,which plays an important role in layer stability for concrete bridge decks.The bonding performance is studied by the pull-out testing.The testing results show that there are different bonding strengths for different materials,and the weakness surface lies between waterproofing layer and bridge concrete.At the same time,with the temperature rising,the bonding strength decreases significantly with the exponential function.In addition,the bonding strength changes with the surface condition of concrete and the function is multinomial.Finally the heal-up ability after being destroyed is only half strength for prepared waterproofing sheet,and almost zero for broken paint films.