SciELO - Scientific Electronic Library Online

 
vol.67 issue1Flexural behavior of hybrid steel fiber reinforced self-consolidating concretesMineralogical quantification of boehmitic bauxite by X-ray diffraction author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Rem: Revista Escola de Minas

Print version ISSN 0370-4467

Abstract

SOARES, Marcela Maira N. S. et al. The effect of calcination conditions on the physical and chemical characteristics of sugar cane bagasse ash. Rem: Rev. Esc. Minas [online]. 2014, vol.67, n.1, pp.33-39. ISSN 0370-4467.  http://dx.doi.org/10.1590/S0370-44672014000100005.

The effect of calcination temperature and air flow on the content of organic material, morphology of particles, degree of crystallinity and the reactivity with lime solution of the sugar cane bagasse ash is evaluated. The results show that the long fibers of the bagasse and organic material are retained when calcination occurs without sufficient air flow. Calcining with forced air-flow breaks the fibers, removes organic material and produces fine particles at a temperature of 600ºC. The non-organic material observed in the ash displays a high degree of crystallinity. Experiments show that the crystalline structure observed in the ashes is due to adhered sand which was not previously washed away. The reduction on the conductivity in lime solution and X-rays diffraction pattern suggest that amorphous silica is formed at temperatures lower than 600ºC and cristobalite is formed at higher temperatures.

Keywords : Sugar cane bagasse ash; pozzolanic activity; mineral admixture.

        · abstract in Portuguese     · text in English     · English ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License