This article presents the results of theoretical and experimental studies on the development of aerated concrete with predetermined pore structure parameters. Investigations of the physical-mechanical and heat-engineering properties of external wall fences made of cellular concrete are given and the optimal parameters of the porosity of the material structure are established. The testing results were tested in the factory and the main properties of aerated concrete with an improved pore structure were determined.
The article presents the results of research to determine the porosity of cellular concrete with different volume mass and strength by the method of “image analysis”. A photo-optical method of cellular concrete structure estimation is developed. The dependence of porosity and strength of the samples on the fractal dimension of the cellular concrete structure is obtained.
Ташкентский институт инженеров железнодорожного транспорта (Ташкент, Узбекистан) Tashkent institute of railway transport engineers (Tashkent, Uzbekistan) Аннотация. Рассмотрен вопрос разработки методики прогнозирования свойств многокомпонентных высококачественных бетонов с учетом поверхностных свойств минеральных наполнителей. Приведены результаты экспериментальных исследований поверхностно-активных свойств минеральных наполнителей природного и техногенного происхождения Республики Узбекистан.
The article presents the results of research in the field of impact of solid bodies withmoving surfaces. Equations are obtained that allow us to determine the kinematic characteristics ofmotion of solid bodies (post-impact angular and linear speeds of the center of mass, impact impulseapplied to a solid body) in the form of a circle and an ellipse after their impact with a moving surfacefor two modes of impact — with and without slippage. The obtained equations for determining thelimiting value of friction coefficient make it possible to establish the mode of impact of solid bodieswith moving surfaces — with and without slippage. The graphical dependences of the post-impactkinematic characteristics of a solid body on the angle of incidence during impact of an elliptical solidbody with moving surfaces are presented.
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