The use of discriminant analysis methods for diagnosis of the causes of differences in the properties of resin mortar containing various fillers

Abstract

Resin mortars belong to the group of concrete-like construction composites. They are obtained by mixing a synthetic resin with a hardener and an appropriately selected aggregate. The latter component is usually as much as 90% of the composite mass and can largely shape the characteristics of the finished product. The fact that the type of filler used can significantly differentiate the values of physical and mechanical parameters of epoxy mortars is confirmed by the results of the exploratory data analysis method used in this article, which is discriminant analysis. This allows us to examine differences between groups of objects based on a set of selected independent variables (predictors). It is used to solve a wide range of classification and prediction problems. The core of discriminant analysis is a model presented in the form of a linear combination of independent variables, which allows classification of observations (e.g. test mortars) into one of the groups that are of interest to the researcher. In discriminant analysis one can distinguish the learning stage (model building), in which classification rules are created based on research results (training set) and the classification stage, i.e. the use of the model, e.g. for testing its prognostic accuracy.

Evaluation of the Utility of Using Classification Algorithms when Designing New Polymer Composites

“…Gabriela Vítková et al used this method to classify bricks [13]. In another article [14], B. Dębska showed the possibility of using the discriminant analysis method for testing the mortars obtained using three different types of aggregates, i.e. perlite, expanded clay and granulated waste rubber, which are a partial substitute for quartz sand.…”

Assessment of the Mechanical Parameters of Resin Composites with the Addition of Various Types of Fibres

“…The aggregate used to make resin composites must be durable and clean as well as dry. Most often it is quartz sand [4], but partial sand replacement with alternative aggregates, such as perlite [5], expanded clay [6], and waste rubber [7,8] gives good effects. Resin concretes are characterized by very high compressive strength (over 100 MPa) and bending strength, as well as very good chemical resistance.…”