Adjusting curing parameters for innovative and durable vegetable fibre-cement composites

Autor(es)

Esther Urrea-Ceferino, Gloria ^{[1, 2]} ; Panesar, Daman K. ^[3] ; Savastano Junior, Holmer ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Biosyst Engn, Ave Duque Caxias Norte 225, BR-13635900 Pirassununga, SP - Brazil

^[2] UPB, Fac Ingn Civil, Escuela Ingn & Arquitectura, Grp Invest Ingn Civil & Arquitectura, Campus Monteria, Carrera 6 97 A-99, Monteria 230002, Cordoba - Colombia

^[3] Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4 - Canada

• Tipo de documento: Artigo Científico
• Fonte: CEMENT & CONCRETE COMPOSITES; v. 103, p. 121-133, OCT 2019.
• Citações Web of Science: 0

Resumo

This work adjusts curing parameters for innovative and durable vegetable fibre-cement composites produced by a slurry vacuum dewatering process. The raw materials used for the cementitious composite mix designs applied in this investigation include: Portland cement, ground silica as an inert filler and vegetable fibre reinforcement. The curing conditions were conducted on eight sets of samples studying the effects of: initial hydration duration (10 h or 24 h); accelerated carbonation exposure (0.035% or 20% of CO2 concentration); and accelerated aging tests (before and after 200 soak \& dry cycles). The mechanical properties of cementitious composites subjected to eight different curing and aging conditions, with a statistical significance increase in carbonated composite strength that is attributed to the packing density of the mixture containing an inert filler (silica quartz).The use of unbleached pulp with silica as a mineral addition in combination with 10 h of initial hydration prior to CO2 curing is indicated to improve the efficiency of the operational steps in the carbonated fibre-cement industry. (AU)

• 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