Efeito da incorporação de finos do beneficiamento de rochas ornamentais nas propriedades do compósito cimento-madeira
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Data
2026-02-11
Autores
Taquetti, Vinicius Borges
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Universidade Federal do Espírito Santo
Resumo
The construction industry stands out as one of the sectors in continuous expansion, which has intensified the demand for more sustainable raw materials capable of reconciling technical performance, productive efficiency, and economic viability. In this context, composite materials have gained relevance by enabling the combination of different constituents, resulting in products with properties superior to those of their individual components. Among these materials, cement-wood panels present high versatility of application, adequate mechanical strength, and potential for the reuse of industrial residues, such as Ornamental Stone Processing Fines (Fibro). Within this framework, the general objective of this research was to evaluate the potential use of Fibro as a partial replacement for cement in the production of cement–wood panels. The study was carried out in two main stages. In the first stage, eucalyptus wood particles were subjected to four different treatments: T01 – untreated wood particles (control); T02 – wood particles washed with hot water; T03 – wood particles washed with water; and T04 – wood particles washed with quicklime. The results indicated that the pre-treatment of wood particles with quicklime (T04) provided superior panel performance, particularly with respect to internal bonding and modulus of elasticity, demonstrating greater compatibility between the wood and the cementitious matrix. In the second stage, treatment T04 was used in the production of cement–wood panels containing 5, 10, 15, 20, 30, and 40% Fibro as partial replacement for cement, corresponding to treatments P05, P10, P15, P20, P30, and P40, respectively. The panels produced were evaluated for their physical and mechanical properties, and the data obtained were subjected to statistical analysis using the F-test, mean comparison tests, and regression analyses. Regarding panels produced with different Fibro proportions, an increase in cement replacement resulted in a gradual reduction in apparent density and mechanical properties. The physical properties showed satisfactory behavior, with water absorption and thickness swelling values below normative limits, indicating adequate dimensional stability of the panels. Fire performance was not significantly affected by the partial replacement of cement with Fibro, confirming the role of the cementitious matrix as a physical barrier. Colorimetric analysis after accelerated weathering revealed only minor variations in surface color, suggesting good physicochemical stability of the material. Thus, within the experimental limits evaluated, formulations containing up to 10% Fibro as partial replacement for cement (treatments P05 and P10) showed the best balance between physical and mechanical properties, aligning with the principles of the circular economy and sustainability applied to the construction industry
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Painéis , Construção civil , Rochas ornamentais , Resíduos , Panels , Civil construction , Ornamental stones , Residue