Optimising the Workability and Strength of Concrete Modified with Anacardium Occidentale Nutshell Ash

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...

Full description

Saved in:
Bibliographic Details
Published inFibers Vol. 9; no. 7; p. 41
Main Authors Oyebisi, Solomon, Ede, Anthony, Owamah, Hilary, Igba, Tobit, Mark, Oluwaseun, Odetoyan, Abimbola
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.07.2021
Subjects
Aggregates
Aluminum oxide
Ashes
Binders (materials)
Boundary conditions
Cement
Composite materials
Compressive strength
Concrete mixing
Concrete properties
Curing
Density
Design factors
Design modifications
Design of experiments
Design optimization
Energy consumption
Environmental impact
Failure analysis
Mechanical analysis
natural pozzolan
optimisation
Silicon dioxide
Variables
Workability
Online AccessGet full text

Cover

More Information
Summary: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.
ISSN:2079-6439
2079-6439
DOI:10.3390/fib9070041