Assessment of the Resource of Water Protection Properties of Coatings Cement Concrete External Wall Buildings

The information on the resource of water-protective properties of cement concrete coatings is given. A methodological approach is proposed for assessing the resource of water-protective properties of coatings, which consists in assessing the time to reach the maximum permissible moisture content in the contact plane “coating-concrete of the enclosing structure”. It is revealed that the resource of water-protective properties depends on the initial moisture content of the structure. Bulk hydrophobization of coatings contributes to an increase in the resource of water-protective properties. The influence of the substrate porosity on the service life of the waterproofing properties of coatings is considered. It is shown that with an increase in the surface porosity of the substrate, a decrease in the time of moisture penetration through the coating is observed. The data on the influence of substrate moisture on the resource of waterproof properties and durability of protective and decorative coatings are given.