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Materials 2013, 6(8), 3108-3127; doi:10.3390/ma6083108
Article

Use of Slag/Sugar Cane Bagasse Ash (SCBA) Blends in the Production of Alkali-Activated Materials

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Received: 28 March 2013; in revised form: 22 May 2013 / Accepted: 24 May 2013 / Published: 25 July 2013
(This article belongs to the Special Issue Geopolymers and Geopolymeric Materials)
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Abstract: 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.
Keywords: alkali-activation; sugar cane bagasse ash; slag replacement; waste valorization; microstructure; strength development alkali-activation; sugar cane bagasse ash; slag replacement; waste valorization; microstructure; strength development
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Castaldelli, V.N.; Akasaki, J.L.; Melges, J.L.; Tashima, M.M.; Soriano, L.; Borrachero, M.V.; Monzó, J.; Payá, J. Use of Slag/Sugar Cane Bagasse Ash (SCBA) Blends in the Production of Alkali-Activated Materials. Materials 2013, 6, 3108-3127.

AMA Style

Castaldelli VN, Akasaki JL, Melges JL, Tashima MM, Soriano L, Borrachero MV, Monzó J, Payá J. Use of Slag/Sugar Cane Bagasse Ash (SCBA) Blends in the Production of Alkali-Activated Materials. Materials. 2013; 6(8):3108-3127.

Chicago/Turabian Style

Castaldelli, Vinícius N.; Akasaki, Jorge L.; Melges, José L.; Tashima, Mauro M.; Soriano, Lourdes; Borrachero, María V.; Monzó, José; Payá, Jordi. 2013. "Use of Slag/Sugar Cane Bagasse Ash (SCBA) Blends in the Production of Alkali-Activated Materials." Materials 6, no. 8: 3108-3127.


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