Mixture Experiment Model for Predicting the Static Modulus of Elasticity of Laterite-Quarry Dust Concrete
Keywords:Extreme Vertices Design, Laterite-quarry Dust concrete, Static Modulus of Elasticity
Static modulus of elasticity of concrete is an important structural property of concrete. However, there is no consensus on the ideal methodology for the characterization or estimation of the property, which has led to specifying a minimum value to be met by designers. This paper developed a model for predicting the 28th-day static modulus of elasticity of laterite-quarry dust concrete using [5, 2] extreme vertices design. The model was formulated using existing data and was validated using the p-value, F statistics, and normal probability plot. The static modulus of elasticity was determined as a function of the compressive strength and density of the concrete cubes and a second-degree polynomial was fitted to the data of the static modulus of elasticity. Several mix proportions were generated and converted to ratios and their static modulus of elasticity was obtained using the developed model. The minimum and maximum static modulus of elasticity predictable by the model are 18.51(GPa) and 28.87(GPa). The static modulus of elasticity of laterite-quarry dust concrete for both domestic and commercial construction work can be predicted using this model.
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