Rationalizing the impact of aging on fiber-matrix interface and stability of cement-based composites submitted to carbonation at early ages

Autor(es)

Tonoli, G. H. D. ^[1] ; Pizzol, V. D. ^[1] ; Urrea, G. ^[2] ; Santos, S. F. ^[3] ; Mendes, L. M. ^[1] ; Santos, V. ^[2] ; John, V. M. ^[4] ; Frias, M. ^[5] ; Savastano, Jr., H. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Lavras UFLA, Dept Forest Sci, CP 3037, BR-37200000 Lavras, MG - Brazil

^[2] Univ Sao Paulo, Fac Zootecnia & Engn Alimentos, Dept Biosyst Engn, Ave Duque de Caxias Norte 225, BR-13635900 Pirassununga, SP - Brazil

^[3] Univ Estadual Paulista UNESP, Dept Mat & Technol, Fac Engn, V Ariberto Pereira da Cunha 333, BR-12516410 Guaratingueta, SP - Brazil

^[4] Univ Sao Paulo, Dept Construct Engn, Escola Politecn, BR-05508900 Sao Paulo, SP - Brazil

^[5] Eduardo Torroja Inst Construct Sci CSIC, C Serrano Galvache 4, Madrid 28033 - Spain

• Tipo de documento: Artigo Científico
• Fonte: Journal of Materials Science; v. 51, n. 17, p. 7929-7943, SEP 2016.
• Citações Web of Science: 12

Resumo

The objective of this work is to show the effect of carbonation at early stages on fiber-cement composites and impact on hydration, chemical and dimension stability. Carbonation increased the content of CaCO3 polymorphs and consumed Ca(OH)(2) and other hydrated calcium phases. Micrographs and energy-dispersive spectrometry showed the CaCO3 formed is precipitated in the pore structure of the matrix, decreasing diffusion of Si, S, and Al during hydration. Therefore, a refining process of pore sizes is produced, and fiber-matrix interface in carbonated composites was improved, leading to volume stabilization of the composite, as indicated by lower drying shrinkage and lower porosity. (AU)

• Processo FAPESP: 13/50790-8 - Materiais à base de cimento não convencionais desenvolvidos com resíduos agroindustriais como contribuição para uma indústria mais sustentável
• Beneficiário: Holmer Savastano Junior
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/23810-8 - Estudo de matrizes cimentícias com cinzas agroindustriais e fibras vegetais para fibrocimento
• 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