Abstract
In this article the question of the influence of the kinetics of hardening concrete on its strength in building structures through the stress function. Determined a direct correlation between the optimal structure of concrete and a guarantee of high strength and durability of building structures that ensured a coincidence given the amounts and extreme properties. A method for predicting the elastic properties of concrete based on known theory of strength of concrete model. It is shown by way of example, that in certain specific strength characteristics of concrete, properties of its components (cement stone and aggregates), the maximum value of the short-term strain, creep deformation and modulus of elasticity of concrete depends on its strength at the time of loading. The proposed method is the most convenient for practical approximation to obtain the equations of mechanical state to determine the total deformation of concrete.In this article the approach to determine the strength of concrete in building structures through the stress function under load. It is shown by way of example, that the results obtained by experiment and the proposed article approach to the assessment of the strength to coincide with high accuracy.
Highlights
Deformation properties of concrete depends on its structural characteristics, resulting dosage and quality components, but the intensity of deformations in concrete constructions can not be reliably predicted depends only on the strength of the composite, while retaining all other conditions equal to [4, 6]
According to the law "alignment" I.A.Rybev, which reflects a high quality performance products, provided that the specific values of the properties are at specified values, you must use the following principle: a comparison of materials in the research and practical developments are not as often made - equal to or under the same conditions but only when the respective conditions, i.e. under optimal - similar to each other, structures
To improve the reliability of the valuation of deformation characteristics of concrete, along with the strength necessary for the long-term deformation to take into account the specific amount of water in the mixing of concrete, which is closely correlated with the initial moisture content of the concrete; for short-term deformation to take into account the specific of cement paste content in the concrete mix, which determines the ratio of cement paste and aggregate in the hardened concrete
Summary
Deformation properties of concrete depends on its structural characteristics, resulting dosage and quality components, but the intensity of deformations in concrete constructions can not be reliably predicted depends only on the strength of the composite, while retaining all other conditions equal to [4, 6]. This implies that the findings on the relationship between deformation and concrete strength to do is useless, if not provided in advance some of the boundary conditions and additional factors characterizing features of the concrete structure, which vary (or remain constant) simultaneously with the change in strength. According to the law "alignment" I.A.Rybev, which reflects a high quality performance products, provided that the specific values of the properties are at specified values, you must use the following principle: a comparison of materials in the research and practical developments are not as often made - equal to or under the same conditions (which can result in large errors) but only when the respective conditions, i.e. under optimal - similar to each other, structures
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