Optimizing the Rheology of Concrete modified with High Silica and Alumina Precursor for Normal Workability in the Built Environment

Oyebisi, S.O and Ede, A. N. and Owamah, H.I. and Oluwafemi, J.O and Sani, R. O. and Odetoyan, Abimbola Oyebola and Akpabot, A.I. (2021) Optimizing the Rheology of Concrete modified with High Silica and Alumina Precursor for Normal Workability in the Built Environment. In: International Conference on Engineering for Sustainable World (ICESW 2020), 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) T Technology > TD Environmental technology. Sanitary engineering T Technology > TH Building construction
Divisions:	Faculty of Engineering, Science and Mathematics > School of Civil Engineering and the Environment
Depositing User:	Patricia Nwokealisi
Date Deposited:	16 Oct 2024 13:07
Last Modified:	21 Oct 2024 10:35
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/18513

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