Research Of Ceramic Tile Bonding System Based On Flexible Cement-based Waterproof Layer

In order to improve the waterproof performance of the building kitchen and bathroom,it is necessary to apply a flexible cement-based waterproof material on the surface of the wall,and then a construction process of applying the tile on the waterproof layer appears.CoMPared to conventional processes,this system increases the risk of tile emptying.At present,there is no research on the reasons why it is easier to fall bricks.Therefore,systematic research on tile bonding system based on flexible cement-based waterproof layer is very necessary and meaningful.The tile bonding system based on the flexible cement-based waterproof layer consists of a concrete base,a flexible cement-based waterproof layer,a tile adhesive and a vitrified tile.The paper studies the ceramic tile bonding system based on flexible cement-based waterproof layer from three aspects.Firstly,the effects of base surface wetness,waterproof layer curing time and tile backing on the bonding properties of tile bonding system based on flexible cement-based waterproof layer were discussed.The failure modes of the drawn test block were analyzed.The results show that:(1)the wetting of the base surface to the saturated surface can significantly improve the bond strength of the system;(2)the curing time of the waterproof layer can reach more than 24 hours to ensure the bond strength of the system;(3)the back grain The more open,the greater the bond strength of the system;(4)in the ideal construction environment,the bond strength of the system is the best when the interface damage and the area of cohesive failure are close.Secondly,using finite element software for numerical modeling,the influence of the thickness and elastic modulus of waterproof layer and tile adhesive on the monolithic tile bonding system based on flexible cement-based waterproof layer was studied and coMPared.Stress cloud diagram of the bonding system and multiple tile bonding systems.The simulation results show that:(1)when the elastic modulus of the tile adhesive is three times that of the waterproof layer,the stress grading of the system is obviously improved;(2)the thickness of the ceramic tile adhesive has obvious influence on the stress of the system.The coating thickness of the adhesive is controlled to be 5 mm to 10 mm;(3)the stress concentration part of the flexible waterproof system of the facade mainly appears at the position of the restraining edge of the wall and the position of the tile in the middle part of each side.Finally,based on the results of experiments and numerical simulations,the reinforcing fiber was used to modify the tile adhesive to study the effect of the reinforcing fiber on the compressive and flexural strength,crack resistance and water resistance of the tile adhesive,and the fiber reinforced ceramic tile The binder is applied to a tile bonding system based on a flexible cement-based waterproof layer to investigate its effect on the bond strength of the system.The results show that:(1)glass fiber has better drying performance of tile adhesive than polypropylene fiber,but polypropylene fiber has obvious effect on toughness improvement;(2)two kinds of fiber improve the water resistance of tile adhesive.(3)polypropylene fiber can improve the bonding strength of C2 and R1,and glass fiber can improve the bonding strength of C2 and R2.