CHARACTERIZATION OF CASSAVA STARCH BAGASSE ASH FOR USE IN CEMENTITIOUS MATRICES

Cassava starch bagasse ash (CSBA) is an agro-industrial byproduct abundantly generated in Brazil, yet its applications in civil construction remain underexplored. This study evaluates the potential of CSBA as a supplementary cementitious material through a detailed chemical, physical, and thermal characterization. The experimental methodology included drying and milling the bagasse, followed by thermal treatments at 650°C, 900°C, and 1000°C to produce ashes with varying properties. Analytical techniques such as Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), and differential scanning calorimetry (DSC) were employed to determine its composition and thermal behavior. Microscopic analysis and specific mass tests assessed physical properties. Results highlighted that combustion at 650°C produced the highest amorphous silica content, which enhances pozzolanic activity. Despite its low silica concentration compared to Portland cement, CSBA demonstrated favorable characteristics for partial replacement in cementitious matrices. This study contributes to sustainable construction by promoting the circular use of agro-industrial residues and reducing environmental impacts. Furthermore, it provides a pathway for incorporating CSBA into eco-friendly concrete and mortar formulations, addressing the need for innovative and sustainable materials in civil engineering.