Autor(es)

dos Santos, Valdemir ; Tonoli, Gustavo Henrique ; Savastano, Holmer, Jr. ; Ghavami, K ; Franco, PJH

• Tipo de documento: Artigo Científico
• Fonte: NON-CONVENTIONAL MATERIALS AND TECHNOLOGIES: NOCMAT FOR THE XXI CENTURY; v. 7, p. 13-pg., 2018-01-01.

Resumo

The proposal presented in this paper is to use accelerated carbonation via carbonated water to modify the microstructure of the cementitious matrix. This particular process generates stabilization of the pore volume in the early age of the composite and avoiding the degradation of the cellulosic fiber, which is susceptible to the alkaline attack of the cementitious matrix. Chemical and morphological characterizations were performed, such as X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermogravimetric analysis (TG). The compounds were also physically (water absorption and density) and mechanically analyzed (four-point bending test: modulus of rupture, modulus of elasticity, limit of proportionality and specific energy) after 28 days of wet curing and after 200 soak & dry cycles. The results show that there is a need for a brief period of hydration and then it is possible to carbonate the materials. Carbonation yields substantial mechanical and physical gains, as well as greater protection of the fiber that does not mineralize. (AU)

• Processo FAPESP: 17/10123-3 - Estudo da estabilidade dimensional em compósitos de fibrocimento carbonatados via água gaseificada e com auxílio de bicarbonato de sódio
• Beneficiário: Valdemir dos Santos
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 12/51467-3 - Agroindustrial wastes and their potential use as appropriate materials for housing and infraestructure (Agrowaste)
• Beneficiário: Holmer Savastano Junior
• Modalidade de apoio: Auxílio à Pesquisa - Temático