ABSTRACT
The construction industry has been absorbing waste from various industrial segments and transforming them into components for use in construction, through its incorporation in materials such as mortars and concretes. Due to this fact, this study aims to evaluate the behavior of mortars with different substitutions of small aggregates for rubber residue, conferring their physical and mechanical behavior. In order to verify the best substitution ratio, the tests were carried out on reference mortar and mortar with residues in the proportions of 2,5% wt, 5% wt, 10% wt and 15% wt of substitution of sand by rubber, the reference trace is 1: 3 (cement: aggregate). For the preparation of the mortars, the aggregates, sand and rubber were divided into four granulometric fractions, generating four subfamilies of mortars for each family of mortar with residues. For characterizing of the mortars, tests of consistency index, axial compression, tensile strength by diametrical compression, absorption by capillarity and absorption by immersion were performed. Based on these tests two traces of mortar were chosen to cover two prototypes of masonry, in order to verify the behavior of the coating mortar. The prototypes were analyzed visually in relation to the appearance of pathological manifestations and were tested for water absorption by the pipe method. The results indicate that in mortars with residue a decrease in the resistances has occurred. In the absorptions some subfamilies had better performance than the reference mortar. For the prototypes the use of rubber did not influence the behavior of the mortar coating and the permeability by the pipe method was shown without significant differences in the results obtained.
Keywords
Architecture technology; construction innovation; rubber residue; coating mortar
