Influence of incorporation of glass waste on the rheological properties of adhesive mortar

The large amount of solid wastes generated in the Brazilian urban centers is a concern to the society. One solution is the incorporation of such wastes in cement matrices, in order to foster some improvement to their properties and saving raw materials. The purpose of this paper is to study the influence of wastes from the wastewater treatment plant of the glass polishing process in the rheological properties of adhesive mortar with partial replacement of cement and fine aggregate. The glass powder was used in different percentages of Portland cement and fine aggregate (sand). The rheological properties tested in the mortar are increasingly important, due to the need for greater productivity and efficiency at the construction sites for application in a fluid state, avoiding detachment issues in the coatings. The rheological investigation method used in this work is Squeeze Flow. In this method, the flow of the material results from the application of a compression load on the sample in its fresh state causing internal flaking due to the shearing stress. The applied load versus displacement curves shows that the adhesive mortars analyzed have different rheological characteristics, as each of them presented a distinct absorption capacity in the compression load imposed by the moving puncture equipment. None of the mortars studied presented a greater than the reference mortar compression load.