Strength Development and Microstructural Investigation of Calcium Carbide Residue and Fly Ash Prepared with Optimized Alternative Green Binders

Abstract:

The development of new environmentally friendly binder from calcium carbide residue and fly ash wastes were investigated in this study. The key point of this work is difference to several previous investigations in that the optimized mixture proportion of the raw materials were calculated based on their chemical composition and their reaction. The compressive strength development over the curing age was also compared with reference mortar created with OPC binder. Mortar cubes were cast from the mix containing the calcium carbide residue and fly ash, at the optimized ratio. The compressive strength of the mortar was then monitored over an extended period: at 56 days it was 10.66 MPa, which is approximately 47% of the reference mortar. The morphologies and chemical compositions of the developed mortar showed the presence of spherically shaped of unreacted fly ash powder particles embedded in a cement C–S–H gel resulting from the pozzolanic reaction of raw materials.

• Periodical: Key Engineering Materials (Volume 904)
• Pages: 429-434
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.904.429
• Online since: November 2021
• Authors: Papantasorn Manprom, Phongthorn Julphunthong*, Pithiwat Tiantong, Tawat Suriwong
• Keywords: Calcium Carbide Residue, Cementitious Materials, Fly Ash, Pozzolanic Reaction

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