Evaluation of the performance and durability of building paints produced with waste from granite and marble processing

• Ano de defesa: 2024
• Autor(a) principal: Basso, Márcia Maria Salgado Lopes
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: eng
• Instituição de defesa: Universidade Federal de Viçosa; Engenharia Civil
• Palavras-chave em Português: Tintas; Materiais de construção - Vida útil; Reaproveitamento (Sobras, refugos, etc.); Granito; Mármore; Materiais e Componentes de Construção
• Link de acesso: https://locus.ufv.br/handle/123456789/33759; https://doi.org/10.47328/ufvbbt.2024.345

The production of paints using waste from the granite and marble processing is a new alternative to promote sustainable development in civil construction. However, challenges such as the lack of an effective process for dispersing and stabilizing pigments, along with the low resistance of mixtures to attack by biological agents, can compromise the performance or even make the use of these paints unfeasible. Therefore, this study aimed to evaluate the performance and durability properties of latex paints produced from the combination of polyvinyl acetate (PVA) resin and granite (GW) and marble (MW) waste, with a focus on proposing improvements in the formulation. To achieve this purpose, the most appropriate proportions of GW and MW (pigments), water (solvent), and PVA resin (binder) were initially determined to meet the minimum requirements for hiding power and abrasion resistance established for economic category paints. Next, the influence of biocidal and dispersant additives on paint performance was investigated, analyzing hiding power, abrasion resistance, dispersion, and resistance to bacterial growth. Finally, the durability of paints produced with GW and MW was evaluated, comparing them with economic category latex paints available on the market through exposure tests to natural and accelerated weathering. The results obtained indicated that paints with the best performance are composed of 41-47% GW, 35% water, and 18-24% resin. Furthermore, the inclusion of a biocidal additive maintained the optical and mechanical properties of the paints, while substantially reducing the bacteria growth. However, the addition of a dispersant additive improved the dispersion of the components, but compromised the abrasion resistance and durability of the paint. The weathering results demonstrated that the paints only underwent color alteration after one year of exposure. Comparisons of the effects of natural and accelerated weathering indicated that paint deterioration observed after one year of natural weathering can be reproduced in just two cycles (16.6 days) of accelerated weathering. It is concluded that paints produced with granite waste exhibit great potential for use due to their performance and durability compared to other economical paints. Keywords: Durability. Granite. Marble. Paints. Performance. Waste.