Reaproveitamento de resíduos de vidro: substituição de areia por vidro moído para o fabrico de blocos de argamassa não estruturais

Abstract

The volume of waste generated every year is growing all over the world and is one of the biggest problems facing modern society. The aim of this work is to assess the possibility of reusing non-returnable glass bottle waste to make non-structural mortar blocks. In order to assess the feasibility of its use, the waste was first crushed, sieved using an ASTM sieve with a maximum size of 4.75mm, the physical and granulometric characterization of the components was carried out and the compressive strength and water absorption of the test specimens were determined. To this end, mortar mixes were formulated, replacing all or part of the coarse sand with waste glass, and prismatic specimens were molded. The specimens were cured for 2, 7 and 14 days and then the compressive strength and water absorption were determined. The compressive strength and water absorption tests showed that the A02 reference mixture, after 14 days, can be recommended as a suitable partial substitute for coarse sand in the preparation of mortars. Mortars for mortar blocks were formulated by partially replacing the coarse sand with the waste in 1:3:1 and 1:3:2 mixtures, and prismatic specimens were molded.The prismatic specimens were cured for 2, 7 and 14 days and then the simple compressive strength of the prismatic specimens was determined. The results were satisfactory, given that standard NBR 6136 (1994) requires the simple compressive strength to be greater than 4.5 MPa after 14 days for the mortar to be used to produce blocks. The results obtained are promising for the use of waste glass as a substitute for coarse sand. (TRADUÇAO NOSSA)