Banca de DEFESA: THÉOPHILE JÉSUHOUNKO HOUESSOU

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE: THÉOPHILE JÉSUHOUNKO HOUESSOU
DATA: 25/08/2025
HORA: 14:00
LOCAL: on line
TÍTULO:

PAPER TUBE-BASED CEMENTITIOUS COMPOSITES WITH AND WITHOUT VERMICULITE: TOWARD SUSTAINABLE HOUSING DEVELOPMENT

PALAVRAS-CHAVES:

Vermiculite, wood-cement panels, housing development, sustainability, circular economy, paper tubes.

PÁGINAS: 76
GRANDE ÁREA: Ciências Agrárias
ÁREA: Recursos Florestais e Engenharia Florestal
RESUMO:

Cementitious composites are widely used materials in civil construction. They represent an efficient and sustainable solution, standing out for their durability, resistance to moisture and fire, as well as being lightweight and easy to install. Cementitious composites are versatile and can be applied in various areas, such as coatings, partitions, and facades. Their acoustic and thermal insulation capacity makes them attractive for construction projects. However, it is important to consider that, although they exhibit good resistance, their quality can be affected by extreme conditions, requiring specific care in outdoor environments.  With the aim of improving the quality of these composites and enabling efficient reuse of paper tube waste, this study analyzes the physical and mechanical properties of cementitious composites manufactured with paper tube waste, with and without the addition of expanded vermiculite. The research was designed with four treatments, evaluating different percentages of paper tube waste replacement with vermiculite (0, 10, 20, and 30%). In the production of the composites, CPV-ARI Portland cement, shredded paper tubes, expanded vermiculite, calcium chloride, and water were used. The composites were produced with a nominal density of 1.10 g/cm³, with a cement-to-paper waste ratio of 1:0.37, cement-to-calcium chloride ratio of 1:0.06, and cement-to-water ratio of 1:0.6. In the hydraulic press, the composites were cold-pressed under a pressure of 8.6 kgf/cm² for ten minutes, followed by stapling for 24h and curing for 28 days. Additionally, mechanical, physical, and thermal conductivity tests were conducted on the composites, evaluating the modulus of rupture, modulus of elasticity, compressive and internal bond strength, and finally, their thermal conductivity. The results showed that replacing 30% of the paper with expanded vermiculite increased compressive strength by 240% compared to the composite without vermiculite, reduced water absorption to 9.78%, and maintained stable thermal conductivity. Replacement of over 20% of Kraft paper with vermiculite significantly improved mechanical properties without compromising thermal insulation.  Thus, it is concluded that the combination of Kraft paper and expanded vermiculite is a viable alternative, both technically and environmentally, for producing sealing and partition composites, with the potential to reduce the use of virgin resources by up to 30%. This study provides valuable information on the practical application of paper tube waste in fiber-cement composites and offers data support for future theoretical research, which is an important contribution to the development and optimization of technologies for enhancing fiber-cement products from industrial waste and their applications. This dissertation contributes valuable information on the practical application of paper tube waste in fiber-cement composites and provides data support for future theoretical research, representing an important contribution to the development and optimization of technologies for expanding fiber-cement products from industrial waste and their applications.

MEMBROS DA BANCA:
Externo à Instituição - ADRIANO REIS PRAZERES MASCARENHAS - UFR (Membro)
Interno - FELIPE GOMES BATISTA - UFLA (Suplente)
Presidente - GUSTAVO HENRIQUE DENZIN TONOLI (Membro)
Externo à Instituição - MARIANA APARECIDA BRAGA NASCIMENTO - UFLA (Suplente)
Externo à Instituição - OTAVIO TITTON DIAS - UTSC (Membro)