Optimising the Workability and Strength of Concrete Modified with Anacardium Occidentale Nutshell Ash
| Autor: | O G Mark, H.I. Owamah, Solomon Oyebisi, Anthony N. Ede, Abimbola Odetoyan, Tobit Igba |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
cement
Curing (food preservation) Materials science QH301-705.5 optimisation QC1-999 composite materials 0211 other engineering and technologies Chemicals: Manufacture use etc Waste material 02 engineering and technology Biomaterials modelling 021105 building & construction TP890-933 Composite material Biology (General) Civil and Structural Engineering response surface Cement Aggregate (composite) Model equation biology Anacardium Physics TP200-248 Textile bleaching dyeing printing etc 021001 nanoscience & nanotechnology biology.organism_classification compressive strength natural pozzolan Slump Compressive strength Mechanics of Materials workability Ceramics and Composites 0210 nano-technology |
| Zdroj: | Fibers Volume 9 Issue 7 Fibers, Vol 9, Iss 41, p 41 (2021) |
| ISSN: | 2079-6439 |
| DOI: | 10.3390/fib9070041 |
| Popis: | Strength failure persists both in structural and mechanical analysis. One of its prominent characteristics is the adequate provision for parameters that minimise or maximise strength objectives while satisfying boundary conditions. The previous optimisation of concrete strength usually neglects mix design mechanisms induced by optimisation. Recent efforts to accurately optimise the concrete compressive strength have factored in some of these mechanisms. However, optimising concrete strength modified with high silica and alumina precursors, and crucial mix design factors are rare. Consequently, this paper optimised the concrete workability and strength, incorporating binding, water/binder ratio, binder/aggregate ratio, and curing mechanisms using the Box–Behnken design approach (BBDA). A waste material, anacardium occidentale (cashew) nutshell ash, was valorised and used at 5, 10, and 15 wt.% of cement. The composites were made, cured and tested at 14–90 d. The results revealed a high precision between the experimental slump and the optimisation slump at 97% R2. In addition, a 5% increase in compressive strength was obtained compared with the target compressive strength. Besides, the correlation between the model equation obtained from this study and predictions of previous studies via BBDA yielded a strong relationship. |
| Databáze: | OpenAIRE |
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