Cementitious surface treatments

F ie 14.1 Schematic representation of the different types of surface treatment of concrete (o) organic coating, (fc) pore-lining treatments, (c) pore-blocking treatments, (d) thick cementitious coating, shotcrete or rendering, (6)... 

Some materials can create particular problems for surface preparation and for obtaining adequate adhesion, and so should be avoided if possible. Bonds to metal alloys and plastics have been well researched, and a number of procedures are documented. Bonds to cementitious and siliceous surfaces are also readily obtainable, although little is really known about optimising surface treatment processes for maximum adhesion. Regard should be paid to the dusty, friable nature of concrete surfaces, as well as its high alkalinity. 

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