Fiber-cement composites hydrated with carbonated water: Effect on physical-mechanical properties

Author(s)

dos Santos, Valdemir ^[1] ; Denzin Tonoli, Gustavo Henrique ^[2] ; Marmol, Gonzalo ^[1] ; Savastano, Jr., Holmer ^[1]

Affiliation

^[1] Univ Sao Paulo, Fac Anim Sci & Food Engn, Duque Caxias Norte St 225, BR-13630000 Sao Paulo - Brazil

^[2] Univ Fed Lavras, Dept Forest Sci, BR-3037 Lavras, MG - Brazil

• Document type: Journal article
• Source: CEMENT AND CONCRETE RESEARCH; v. 124, OCT 2019.
• Web of Science Citations: 0

Abstract

The proposal presented here is to use accelerated carbonation via carbonated water to modify the microstructure of the cementitious matrix. Carbonated water was tested in different conditions of molding and curing of the fiber-cement composites. This particular carbonation process generates stabilization of the pore volume of the composite and reduced the degradation of the cellulosic fibers by the consumption of CH and formation of the CaCO3 in early age. The results indicated that carbonated water was suitable for improving hydration, and as a carbonating agent in the fiber-cement composites. The curing carbonation yielded substantial mechanical and physical gains, as well as further protection of the cellulosic fibers against mineralization into the cement. (AU)

• FAPESP's process: 17/10123-3 - Dimensional stability study in carbon fiber cement composites using carbonated water and with the aid of sodium bicarbonate
• Grantee: Valdemir dos Santos
• Support Opportunities: Scholarships in Brazil - Post-Doctoral