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- Use of slag/sugar cane bagasse ash (SCBA) blends in the production of alkali-activated materials
- Universidade Estadual Paulista (UNESP)
- Universitat Politècnica de València
- Blast furnace slag (BFS)/sugar cane bagasse ash (SCBA) blends were assessed for the production of alkali-activated pastes and mortars. SCBA was collected from a lagoon in which wastes from a sugar cane industry were poured. After previous dry and grinding processes, SCBA was chemically characterized: it had a large percentage of organic matter (ca. 25%). Solutions of sodium hydroxide and sodium silicate were used as activating reagents. Different BFS/SCBA mixtures were studied, replacing part of the BFS by SCBA from 0 to 40% by weight. The mechanical strength of mortar was measured, obtaining values about 60 MPa of compressive strength for BFS/SCBA systems after 270 days of curing at 20 °C. Also, microstructural properties were assessed by means of SEM, TGA, XRD, pH, electrical conductivity, FTIR spectroscopy and MIP. Results showed a good stability of matrices developed by means of alkali-activation. It was demonstrated that sugar cane bagasse ash is an interesting source for preparing alkali-activated binders. © 2013 by the authors; licensee MDPI, Basel, Switzerland.
- Materials, v. 6, n. 8, p. 3108-3127, 2013.
- Slag replacement
- Strength development
- Sugar cane bagasse ash
- Waste valorization
- Activating reagents
- Alkali activation
- Alkali-activated binder
- Electrical conductivity
- Micro-structural properties
- Sugar cane bagasse ashes
- Waste valorizations
- Blast furnaces
- Compressive strength
- Electric properties
- Fourier transform infrared spectroscopy
- Silicon compounds
- Sugar cane
- Acesso aberto
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