Journal
MATERIA-RIO DE JANEIRO
Volume 22, Issue 1, Pages -Publisher
UNIV FED RIO DE JANEIRO, LAB HIDROGENIO
DOI: 10.1590/S1517-707620170001.0117
Keywords
sugar cane bagasse ashes; cementitious composites; mechanical behaviour; sustainability
Categories
Funding
- Energy Company of Minas Gerais [CEMIG - PD GT331]
- National Electric Energy Agency [ANEEL - PD GT331]
- Minas Gerais State Research Foundation (Fundacao de Amparo a Pesquisa de Minas Gerais - FAPEMIG) [APQ3035-14, A PQ2126-09 e APQ3739-16]
- National Council for Scientific and Technological Development (CNPq)
- Brazilian Federal Agency
- Evaluation of Graduate Education (CAPES)
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Sugar cane bagasse is a residue of the sugar-alcohol industry, and its main destination is represented by burning boilers for power generation. The bagasse cogeneration of power produces a sugar cane bagasse ash (SCBA) residue that does not have a useful destination. Ashes are commonly studied as pozzolan in Portland cement production. International Standards indicate the use of pozzolan with up to 50% substitution. In the present work, we investigate the use of SCBA as an addition in Portland cement. For this purpose, Portland cement was prepared by substituting cement with 0, 10, 20, and 30% processed SCBA in volume. The ashes were processed by re-burning and grinding and were then characterized by scanning electron microscopy, X-ray diffraction, laser granulometry, X-ray fluorescence spectrometry, the Chapelle method, and pozollanic activity. To evaluate the cement with substitution, we used the mortar recommended by NBR 7215. The mechanical properties of the cements with replacement were analysed through tests of the compressive strength and flexural strength of mortars. The results appear interesting and support the possible use of SCBA in the production of cement from the aspect of mechanical properties evaluated.
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