Model of high-strength lightweight concrete

Modeling is a tool of scientific cognition that makes it possible, by replacing the object under study with its representation (model), to explore it and interpret the results on the object itself. Obviously, the material model should allow for the study of the influence of prescription factors on its properties (direct task) or, with established requirements for the material, determine the parameters of the model (values of factors) that ensure the achievement of established requirements (inverse task). In the course of the study, a compounding and structural model of high-strength lightweight concrete was developed, which is a system of equations that establish the relationship of structural parameters (geometric characteristics, compounding factors (component content) with the sedimentation rate and viscosity of the concrete mixture and the specific strength of concrete. The conducted modeling makes it possible to predict the properties of the concrete mixture and concrete on a hollow aggregate and establish boundary conditions to achieve the target values of key quality indicators. It has been established that an urgent task in the production of high-strength lightweight concretes is the development of compounding and technical solutions that provide a combination of high mobility and uniformity, which is explained by the value of I/C as a key control factor located in opposite optimization areas, and in order to achieve high specific strength of high-strength lightweight concrete, it is additionally necessary to regulate the adhesion of cement stone to a hollow filler.