The development of new effective composites on the basis of technogenic raw material and local materials, which are characterized by low prime cost and improved physicomechanical characteristics, is urgent task. Deficiencies in gypsum in those binding and articles possibly as a result of the creation of composites with the use of effective fillers and dispersed reinforcement. Earlier we developed the gipsovermikulitobetonnye composites with the application of unslaked lime and withdrawals of the saw-milling of volcanic tuff. Use in the composites of pumice, basaltic fibers and portland cement will make it possible to enlarge raw-material base for obtaining the composites with the improved physicomechanical characteristics. The optimum relationship of the components of gypsum, ashes and portland cement, which would ensure obtaining composite with the improved physicomechanical properties with the smaller expenditure of binding agent is revealed. Simultaneously was investigated the influence of the grain composition of ashes on the properties of gipsotsementnoputstsolanovogo composite. Is proposed the stock mixture for preparing the gypsum concrete composite, which ensures the decrease of the specific expenditure of gypsum binding composite to 30,0% without reduction in the strength. The optimum relationship of components for preparing the gypsum concrete composite is revealed: the gypsum: ashes - 1:1, portland cement - 10 20% of the mass of gypsum. The influence of the parameters of fiber reinforcement is investigated by basaltic fibers on their properties with the application of a rotatable plan of the second order of the type of regular hexagon. It is revealed, that the maximum values of the parameters of optimization are observed in the central region of plan s i. Compression strength of the fibrogipsovermikulitobetonnogo composite increases 1,16-1,18, with the bend - 1,62-1,73 times with respect to the strength of initial matrix. The developed composites make it possible to reduce the expenditure of portland cement per 30% and to increase the coefficient of softening to 0,8. Further studies for the study of the fire-retardant properties of the developed composites.

Keywords: gypsum, portland cement, pumice, the distended vermiculite, basaltic fiber, the fibrogipsovermikulitobetonnye composites, the coefficient of softening, transverse strength and compression