Statistical Modelling of the Compressive Strength of Mortar Based on Cement Blended with Mineral Additions by the Method of Experimental Design

Authors : Bouglada Mohammed SALAH, Noui AMMAR, Belagraa LARBI
Pages : 9-19
Doi:10.55549/epstem.1038411
View : 44 | Download : 7
Publication Date : 2021-12-31
Article Type : Research Paper
Abstract :This experimental study aims to study the mechanical behaviour of a mortar based on cement blended with mineral additions insert ignore into journalissuearticles values(pozzolana, limestone and slag);, knowing that the mechanical strength of a mortar is closely related to its composition. The use of the three mineral additions simultaneously, presents a high number of factors affecting the mechanical resistance and requires a very large number of experiments and the obtained data analysis becomes much more complex. In order to optimise the number of tests and to achieve a such satisfactory analysis, a statistical approach known as an `experimental design` was used. The experimental methodology has been established to assess the compressive strength of mortars at 2, 7, 28 and 60 days, by the elaboration of an experimental design for a set of cement mixtures, the level of the three additions insert ignore into journalissuearticles values(factors);, slag, limestone and pozzolana at rates varying from 0% to 35%, provided that a fixed dosage of 35% is maintained for all combinations to form a binary, ternary and quaternary cement in accordance with cement standard requirements CEM II/B. This statistical approach allowed us to evaluate by a numerical analysis the effect of each addition alone as well the meaning of the double or triple interaction resulting from the association of two or three additions at a time. In addition, it has enabled us to establish a representative model that permitted to estimate and predict the mechanical behaviour of any composition in the experimental program with tolerable errors. The obtained results lead to a satisfactory numerical modeling of the compressive strengths, in particular at the age of 28 days, with a trend curve of a an acceptable determined coefficient of R2 equal to 0.87.
Keywords : Compressive strength, Mortar, Mineral additions, Statistical analysis, Experimental design

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