Geopolymer concrete, supplementary cementitious materials, temperature, conductivity, salinity, compressive strength, modelling.

Oyebisi, S.O and Ede, A. N. and Owamah, H.I. and Oluwafemi, John and Sani, R. O. and Odetoyan, Abimbola Oyebola and Akpabot, Akpabot Ifiok (2021) Geopolymer concrete, supplementary cementitious materials, temperature, conductivity, salinity, compressive strength, modelling. In: International Conference on Engineering for Sustainable World, 2021, Online.

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Abstract

Concrete performance in its fresh state is not only pertinent for proper concrete placement, consolidation, and finishing but also its properties in its hardened state. Thus, this study optimized the rheology of concrete modified with high silica and alumina precursor (cashew nutshell ash (CNA)). Cashew nutshell was recycled, and the ash obtained was used at 5, 10, and 15 wt.% of cement using the concrete mix designs of grades C 25-40 to attain the target strengths of 25-40 MPa at 28 days. Both slump and its corresponding compressive strength were determined. Moreover, the concrete slump was optimized using the experimental mix design properties (EMDPs) such as cementitious materials, water/cementitious materials, and cementitious materials/aggregate ratios, as independent (continuous variables). The findings showed that EMDPs influenced the rheology of fresh concrete, significantly, hence yielding an optimized high precision with 99 % R2. Therefore, the model can be used to predict the normal workability of the concrete incorporating CNA in the built environment.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	Optimization, concrete, supplementary cementitious materials, slump, compressive strength, sustainability, built environment, modelling.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Engineering, Science and Mathematics > School of Civil Engineering and the Environment
Depositing User:	nwokealisi
Date Deposited:	05 Dec 2022 13:47
Last Modified:	05 Dec 2022 13:47
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/16487

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