Miroshnychenko K. Scientific and practical bases of increase of efficiency of technology of manufacturing fibrous concrete

Object of research is technological processes of production of fibrous concrete. The aim of the dissertation is to develop scientific basis and practical propositions of increasing the efficiency of the resource-saving technology of manufacturing fibrous concrete with high properties. Methods of research: methods of mathematical statistics; methods of geometrical modeling; standard methods of building materials testing; modern methods of X-ray-phase analysis and differential-thermal analysis. Theoretical and practical results: accomplished complex of theoretical research allowed formulating the principles of design of resource-saving technology of manufacturing fibrous concrete. The results of the research were laid into basis in designing efficient palms of complicated geometrical form. On the basis of given theoretical propositions of the process of agitation were designed and improved the constructions of special agitators; freefall mixer with additional members; turbulent agitators; technological ways of production of fibrous concrete using the devices delivering fiber into the agitator. Scientific newness: there was developed the notion about the influence of production technology on the structure of fibrous concrete and its properties which are determined by the mixture composition, technology of fiber delivery, technological way of agitation; there were formulated the principles of technology of fiber concrete preparation and on this basis there were developed the methods of constructing members for agitators; the mathematical dependence of power indices on technological ways of production was defined; the dependence of service properties and other characteristics of fiber concrete of different content on technological parameters of the production process was defined. Implementation level: the results of the accomplished research were used in design and construction of pipe workshops of the state enterprise "UKRGIPROMEZ". The economical resource conservation at the expense of decreasing the cost of production technology of 1m3 of the mixture for embedding anchorage and grouting under highly technological equipment in comparison with foreign analogues is within 21830 UAH and 33634 UAH; developed constructional decisions were used in design of concrete mixers of forced action public limited company "BETONMASH", annual conservation effect is 21.7 thousand UAH. Developed contents of fibrous concrete and technological equipment were used by limited company "GANG" in production of different items, conservation effect is 27.5 thousand UAH. Application field: technology of fibrous concrete production.