Analysis of the influence of calcination temperature of sugarcane residues for the production of binders

ABSTRACT

Sugarcane bagasse ash is a by-product from the electricity cogeneration process. This residue is mainly composed of silica, so it can be reused as an aggregate and / or as a binder in cementitious matrices. The present work has as main objective to analyze the physicochemical properties of the sugarcane bagasse ash, when calcined at different temperatures, aiming at its application as a binder in a sustainable matrix. The residue (sugarcane bagasse) used in the present study was collected in the municipality of Porto Xavier, located in the state of Rio Grande do Sul. For the analysis, the residue was separated into four samples and then calcined in a muffle with controlled temperature, respectively: 500°C, 600°C, 700°C and 800°C, for a period of one hour. The residue calcination process aims to remove the organic matter present. For the analysis of the physical-chemical properties of the samples, the techniques of X-Ray Diffraction (XRD), Thermogravimetric Analysis (TGA), pozzolanic reactivity and Scanning Electron Microscopy (SEM) were used. The results indicate a higher degree of amorphism in the sample calcined at 500°C and a greater degree of crystallinity at 800°C. Showing a material with great characteristics for use in the production of sustainable binders.

Keywords
Sugarcane bagasse; Calcination temperature; Pozzolanic Reactivity; Physicochemical structure