Construction of models for forecasting the strength of foam concrete

Abstract

Foam concrete is a material that has become widely used in construction in recent years. The main advantage of foam concrete is its lightness, which saves material for producing walls and foundations in civil construction. Since this material has a natural porous structure, it also provides thermal insulation for structural elements. The main areas of application of foam concrete are structural elements, non-structural partitions and thermal insulation materials.

The paper contains a description of the methods for obtaining foam concrete. The classification by brand and purpose depending on the density of the obtained foam concrete is carried out in this paper. It also identifies the main directions and features of using different brands of foam concrete. The analysis of experimental research on the definition of compressive strength of various marks of foam concrete is carried out and it is generalized in the form of graphic dependence. It allows analyzing the influence of the density of the received material on compressive strength.

Using the interpolation method, analytical models of dependence of compressive strength have been constructed. These models allow us to predict the compressive strength of foam concrete at different values of material density. The paper presents six models based on exponential, linear, logarithmic, polynomial and power dependence, which allow estimating the dependence of foam concrete strength on its density. The reliability of the constructed models is also evaluated in the work.

The advantages of using such models are cases when the density of the obtained foam concrete differs from the available data in the literature, for which experimental methods have determined the compressive strength. In this case, designers will be able to assess the strength of foam concrete and ensure its optimal use in construction.

The use of the proposed approach makes it possible to use foam concrete as an alternative building material, as it allows for the assessment of its strength and ensures the selection of optimal material density for the implementation of design solutions of varying complexity, as well as ensure optimal use of this material in construction.