Itkin A. Тhe Scientific bases of development of vibration machines for the compression of concrete mixtures

A dissertation work is devoted to creation of scientific bases of development and planning vibration machines for the compressions of concrete mixtures in form. Existing is specified and a more general theory of vibration compression of con-crete mixtures is formulated. Energy indexes of vibration process of compression are set and theoretical dependences for determination of necessary duration of compres-sion are got. A joint motion of made more compact environment and mobile frame of vibration ground in case of apeak directed vibrations without load is explored from above, with load from above and during work with the resilient safety devices and their basic parameters and modes of vibration influence on the made more compact mixture are definite. The mode of operations of vibration ground is explored with one frequency and twofrequency horizontally by the directed vibrations and basic pa-rameters of vibration ground and load are definite from above, and also rational cor-relations of frequencies and amplitudes of forced vibrations. Basic parameters of twofrequency vibration ground with the spatial vibrations of mobile frame are defi-nite. Motion laws are explored and rational parameters of vibration puncheons and vibration loads are definite from above, used for shaping many emptiness reinforced concrete constructions. New constructions of vibration machines are developed. Ex-perimental researches are executed and a comparison of got results with the theoreti-cal datas is conducted. The inculcation of developed vibration machines in produc-tion showed their high efficiency.