Влияние компонентов заполнителей на свойства керамзитобетона

Abstract

Для выявления влияния компонентов заполнителя на прочностные и деформативные характеристики керамзитобетона в Белорусско-Российском университете были проведены экспериментальные исследования на стандартных образцах в виде кубов, призм и цилиндров. Опытные образцы изготавливались из керамзитобетона классов LC 8/10 – LC 30/33 и испытывались на кратковременное осевое сжатие. В результате для каждого исследованного класса бетона были определены призменная и цилиндрическая прочности, продольный, поперечный и сдвиговой модули деформаций, коэффициент Пуассона, верхний и нижний пределы микротрещинообразования, коэффициент цилиндрической и призменной прочности. The search for effective materials for the production of structures is due to increasing requirements for the operational and physical-mechanical properties of building structures. Nowadays it is relevant to use structural and thermal insulation lightweight concrete. The controlling factors in determining the strength of concrete are cement activity, coarse aggregate strength, and water/cement ratio. However, the main area of application of lightweight concrete is the manufacture of external envelope structures of heated buildings. In this connection, it is available to design compositions for the production of structural and structural thermal insulating claydite concrete, which are used for the manufacture of load-bearing structures. It is available to design the correction of the structural analysis for determining its strength and deformation characteristics. The choice of claydite as a coarse aggregate is justified by the fact that it amounts the largest percentage of the total production of porous aggregates in the Republic of Belarus. The advantage of this material is relatively high strength (compared to other porous aggregates) and a sufficiently large quantity of closed pores. Experimental studies at the Belarussian-Russian University were conducted in order to identify the influence of aggregate components on the strength and deformation characteristics of claydite concrete. Samples of different standard geometric shape (cubes, prisms and cylinders) were used for the purpose of the experiment. Test specimens were made of claydite concrete (strength classes LC 8/10 – LC 30/33). As a result, a short-term axial compression test determined prismatic and cylindrical compressive strengths, longitudinal, transverse and shear secant modulus of elasticity, Poisson's ratio, upper and lower limits of microcrack formation.