CLASSICAL METHODS AND HENRY SCHEFF’S MODEL ON COMPRESSIVE STRENGTH OF CONCRETE: A COMPARATIVE APPROACH
Abstract
In the Building and construction processes, it is pertinent to know the compressive strength of concrete using casted cubes and obtain result of concrete cubes at 28th day. Usually three concrete cubes were casted to determine its strength. Using Henrys Scheff’s polynomial approximation is quite cumbersome. This paper is an attempt to develop a simple mathematical model based on MATLAB R2007b code and compare it with that of Henry Scheff’s Polynomial model. The model formulated compares favourably with the experiment data. It also satisfies the student’s t and chi-square x2 tests. The optimum value of concrete strength predicted by this model is 37.56N/mn2 corresponding to a mix ratio of 1:1:2 of cement, sharp sand and chippings respectively at a water-cement ratio of 0.650.
KEYWORDS: Compressive strength, water cement ratio, mix proportion, curing ages. Henry Scheff’s Polynomial, MathLab R2007b code.
Full Text:
PDFReferences
Aleneme and Mbidike (2019). “The optimization of flexural strength of palm nut fibre concrete using Scheffes theory to predict the compressive strength of palm nut fibre concreteâ€. https://www.researchgate.net/publication /331045157. Materials science for energy technologies journal Feb. 2019.
Anya (2014). “A model for predicting the structural characteristics of sand quary dust blocks for a 4-component mixtureâ€. https://iproject.com.ng/civil-engineering/models-for-predicting-the-structural-characteristics-of-sand-quarry-dust-blocks/index.html
Graph showing the result of Anderson-Darling Normality Test for probability plot of CS.
Lambrake S.D. “Experiments with Mixture an Alternative to the Simplex Tattice Design. “Journal of the Royal Statistical Society Series (Methodological) Vol. 30 No 1, pp 123-136 (2014).
MATLAB, (2010). MATLAB, The Language of Technical Computing, Version 2010a. Math Works Inc Matick, MA, USA.
Ndububa (2018). “A mixture design in fibre cement production by developing a mathematical model using Scheffes that could predict mix proportionsâ€. httpâ€//www.mdpi.com/journal/materials.
Nwachukwu (2022). “Scheffes third degree polynonid model to optimize the compressive strength of polypropylene Fibre reinforce concreteâ€. Vol 8 Issue -2, 2022 IJARIIE-ISSNO(O)2395-4396.
Nwoye C.I, I.M Akigwe, C. Chijioke, D.F. Amatobi, O.F. Adenaike (2020), “Synergistic Correlative Assessment of Compressive Strength of Concrete Based on Concrete Water Ratio and Hydration.
Sule (2018). “The structural characteristics of Chikoko mud-cement using Scheffes theoryâ€. Futospec futo.edu.ng.
Sule S. (2018). “The structure characteristics of chikoko mud-cement using Scheffes and Osadebe’s techniquesâ€. Futospec futo.edu.ng.
Refbacks
- There are currently no refbacks.
Copyright © 2022-2025. Department of Civil Engineering, Nnamdi Azikiwe University. All Rights Reserved..