COMPARISON OF PROPERTIES OF ACTIVATED AND INACTIVATED FINE-GRAINED MIXTURES AND SPECIAL PURPOSE CONCRETE

Abstract

Based on the investigations that have been made, we have done a comparative analysis of changing properties of mixtures and fine concrete based on it depending from different specific surface of finely dispersed fillers: tripoli or sand; from the content of micro-fillers: highly active metakaolin, wollastonite and water-reducing additives-superplasticizers S-3 or Melflux. Mixtures have been prepared with different technological parameters. The first mixtures have been done using high-speed mixers, in the second mixures traditional mixers have been used. The carried out researches show wide possibilities of modification of compositions by organomineral ecologically harmless additives and testify to rationality of development of complex additives separately for the activated and not activated finegrained solutions. It is shown that when switching to another type of filler, even the same chemical composition, the dosages of all components and their ratio should be adjusted optimally. When switching to another type of mixture preparation, the ratio of components also changes. Practical results obtained by the author provide the required and additional quality indicators, increase the physical and mechanical properties of finegrained solutions, increase productivity. The influence of type, structure and dispersion of fillers on the properties of building mixtures is analyzed taking into account technological conditions of their preparation and solutions based on that.