Eliseeva M. Fine aggregate concrete from mechanically activatedmixtures of the basis of furnace granulated slags

Object - the process of mechanical activation of fine concrete mixes based on granulated blast furnace slag. The purpose - theoretical and experimental study for obtaining of fine concrete based on granulated blast furnace slag with high physical and mechanical properties due to mechanical activation of raw concrete mix in the mixer-activator. Research methods: used standard methods of theoretical and experimental studies of the basic properties of raw materials, concrete mixes and concrete; analysis and systematization; chemical, differential thermal, X-ray diffraction analysis methods; methods light microscopy; experimental design. Theoretical and practical results: the theoretical value of the work is to extend the theoretical concepts of mechanical activation of fine concrete mixes based on granulated blast furnace slag in the rotary mixer-activator. It complements existing knowledge of building materials science on the subject. The practical value of the work is based on obtaining of cost-effectiveness of implementation of the proposed technology of fine concrete from mechanically activated mixes based on granulated blast furnace slag and developing of technology guidelines for the preparation of these mixes for building blocks for internal partitions. Scientific novelty: theoretical understanding of the mechanical activation of fine concrete mixes with molding humidity based on granulated blast furnace slag in the rotary mixer-activator received further development, which conclude the joint activation of aggregate and binder in the presence of water increases the contact strength of concrete through more intensive chemical reactions between the components, the effect of mechanical energy causing the defects of crystal lattices of Portland cement and aggregate, their partial recrushing and amorphization of the surface layers of the aggregate; improved technology of fine concrete with a mechanically activated mixes based on granulated blast furnace slag, which consists in simultaneous mixing, activation, and partial recrushing and cleaning of particles of the materials from contaminants of all components of the concrete mix at the required amount of water in a plant - in the rotary mixer-activator; regression equations are first obtained that join the duration of activation of fine mix and its composition with properties of concrete. Degree of implementation: technological instructions for preparing activated fine concrete mix of granulated blast furnace slag for building blocks for internal partitions and conducted a production test pilot batch of concrete building blocks of fine activated mixes of "Techno SKARM." Field of application: production of wall concrete blocks for internal partitions.