REACTIVE POWDER CONCRETE WITH FLY ASH AS ACTIVE MINERAL ADMIX COMPOSITION DESIGN

Abstract

The article presents the results of a study the reactive powder concrete, in which fly ash as active mineral additives were used. The cost of which is significantly lower than the cost of silica fume and metakaolin as the main components of such concrete. As a result of the analysis of the complex obtained experimental data, it was found that the fly ash of thermal power plants is the effective active mineral additive for the manufacture of reaction powder concrete. Due to the fact that the bulk of the ash is represented by particles of a spherical shape, when it is introduced into the composition of concrete, some plasticizing effect is observed which leads to a decrease in W/C and a corresponding increase in strength. Based on the obtained experimental-statistical models, the water demand and strength nomograms of reactive powder concretes constructed using fly ash as an active mineral additives were constructed. These nomograms, together with the complex of the obtained models, can be used to design compositions of reactive powder concrete with a given strength and mobility.