Evaluation of the types of base in the adhesion of gypsum plasters coating

Abstract The use of gypsum plaster paste as an internal wall covering is one of the most commonly used techniques in Brazil, usually made in small thicknesses by manual application or by mechanical projection. This study evaluates, experimentally, the adhesion strength of coatings made with gypsum plaster paste, considering different substrates and application heights. Four types of blocks (ceramic and concrete blocks, sealing and structural blocks), two types of slice cuttings (superficial and even substrate) and three application heights (up to 0.6 m, between 0.6 m and 1.2 m, and above 1.2 m)wereused. The results indicated a strong influence of the base and depth of cut on the adhesion, but no influence of the application height on adherence was identified, due to the natural process of the application of the gypsum plaster coating.