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Effects of supercritical carbonation curing on extruded vegetable fibre-cement
The objective of this work was to investigate the effects of the supercritical carbonation, after pre-curing of three days, on extruded fibre-cement reinforced with bleached eucalyptus pulp and residual sisal fibres. The physical characteristics and mechanical performance was evaluated before and after the soak and dry accelerated ageing cycles test in order to partially simulate the natural weathering mechanism. The supercritical carbonation curing in the initial age led to lower water absorption in the composites and, consequently, to higher bulk density, which improved the microstructure by sealing the opened pores around vegetable fibres. It was observed that the supercritical carbonation curing has a significant effect on crack growth resistance (KIC) of the extruded fibre-cement. After accelerated ageing of 200 cycles of soaking and drying, the average values of energy of fracture of the carbonated and non-carbonated composites decrease approximately 28% and 56%, respectively.
Effects of supercritical carbonation curing on extruded vegetable fibre-cement
The objective of this work was to investigate the effects of the supercritical carbonation, after pre-curing of three days, on extruded fibre-cement reinforced with bleached eucalyptus pulp and residual sisal fibres. The physical characteristics and mechanical performance was evaluated before and after the soak and dry accelerated ageing cycles test in order to partially simulate the natural weathering mechanism. The supercritical carbonation curing in the initial age led to lower water absorption in the composites and, consequently, to higher bulk density, which improved the microstructure by sealing the opened pores around vegetable fibres. It was observed that the supercritical carbonation curing has a significant effect on crack growth resistance (KIC) of the extruded fibre-cement. After accelerated ageing of 200 cycles of soaking and drying, the average values of energy of fracture of the carbonated and non-carbonated composites decrease approximately 28% and 56%, respectively.
Effects of supercritical carbonation curing on extruded vegetable fibre-cement
Santos, S.F. (author) / Schmidt, R. (author) / Almeida, A.E.F.S. (author) / Tonoli, G.H.D. (author) / Savastano, Holmer jun. (author)
2012
10 Seiten, 7 Bilder, 2 Tabellen, 22 Quellen
Conference paper
English
Supercritical carbonation treatment on extruded fibre–cement reinforced with vegetable fibres
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