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  • Upgrading jaw crusher agregate to improve the quality of reused crushed stone

    The results of a patent search in the direction of improving the design of crushing equipment are presented and a modernization option is proposed. Optimization of the parameters of the jaw crusher will prolong the service life, simplify the maintenance and repair processes, improve the quality of the secondary aggregate

    Keywords: crushing, jaw crusher, aggregate of crushed concrete, modernization, optimization, lining, service life, reliability

  • The criterion for assessing the quality of repair work for electricity pilons of transmission line

    The article presents the quality assessment of repair work for electricity pilons of transmission line performed by the method of vibration diagnostics. The suggested criterion for assessing the quality of the repair is relative adhesion of repair layers to the base of the stand. Modeling of structural oscillations strut mount, transmission lines and calculations in the finite-element complex Ansys. The dependence of the parameters own frequency of fluctuations of the value of damage at different values of the space adhesion. The resulting equations based on changes in natural frequencies on the magnitude of adhesion. The calculation of the relative adhesion of the repair composition to the concrete model of the design. The material presented can be used for assessing the quality of repair work of different structures of the core type reinforced concrete structures.

    Keywords: vibration diagnostics, quality, repair of structures, defect, adhesion, natural frequencies