Análise sobre o potencial da utilização do pó de vidro para redução da porosidade e ganho de resistência do concreto.

Abstract

This study aimed to analyze the potential of using glass powder in concrete production, evaluating its influence on reducing porosity and increasing the material's mechanical strength. The research was motivated by the need for sustainable alternatives in civil construction, considering the reuse of waste and the reduction of the environmental impact associated with cement production and glass disposal. Initially, a literature review on the use of glass powder in concrete was carried out. Then, the materials used were characterized, including fine and coarse aggregates, cement, and glass powder, through granulometric tests and determinations of physical properties. Subsequently, different concrete mixes were produced with varying contents of 0%, 5%, 10%, and 15% of added glass powder, and properties were evaluated in the fresh and hardened state, such as consistency, compressive strength, and water absorption. The slump test, performed on fresh concrete for the different concentrations of glass powder investigated, indicated that the consistency remained within the specified limits. The results indicated that moderate levels of glass powder addition contributed to improvements in the mechanical performance of the concrete, especially for substitutions of 5% and 10%, which showed the best results for compressive strength at 28 days. In contrast, higher levels showed a tendency towards increased absorption, possibly associated with increased porosity and changes in the cementitious matrix. Thus, it is concluded that glass powder has potential for application as an alternative material in concrete production, provided it is used in appropriate proportions, contributing to the development of sustainable materials in civil construction.