Optimization and modeling of fresh state properties of cement-calcined clay-calcium carbide waste pastes using the response surface methodology
A.S. OGUNRO, M.A. USMAN, E.E. IKPONMWOSA, R.U. OWOLABI
Abstract. A satisfactory model for predicting the setting times has been a challenge, due to the multivariable nature of cement hydration and pozzolanic reactions. This presents a challenge in creating an appropriate model to predict the setting times of pastes. This study presents a model for predicting setting times of pastes formed from partially substituting Ordinary Portland Cement (OPC) with calcined Ifonyintedo clay (CIC) and calcium carbide waste (CCW). Individual and interactive effects of three processing factors on setting times were investigated by a Vicat apparatus using the central composite design (CCD) model of response surface methodology (RSM) for experimental design, modeling, and process optimization. The modeled optimization conditions were CEMII (77.1wt%), CIC (17.3wt%), and CCW (5.64wt%), water-binder (w/b) ratio (0.244) achieving desirability of 1 with the corresponding initial and final setting times (IST, FST) of 118.65mins, 312.43mins against the predicted values of 114.71mins, 300.68mins, respectively. The ANOVA confirms that the model is satisfactory, hence, useable for construction works. Comprehensive analysis revealed that silica precursor underwent polymerization, resulting in the formation of products of reaction that exhibit characteristics of C-S-H gel.
Keywords
Modelling, Optimization, RSM, C-S-H Gel, Setting Time, Pozzolanic Reaction
Published online 3/25/2025, 10 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: A.S. OGUNRO, M.A. USMAN, E.E. IKPONMWOSA, R.U. OWOLABI, Optimization and modeling of fresh state properties of cement-calcined clay-calcium carbide waste pastes using the response surface methodology, Materials Research Proceedings, Vol. 51, pp 118-127, 2025
DOI: https://doi.org/10.21741/9781644903537-14
The article was published as article 14 of the book Advances in Cement and Concrete
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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