Abstract
In this paper, research is carried out in the field of application of carbonate fine filler and hyper- and superplasticizers for enhancing micro- level energy dissipation in fine-grained concrete. The joint effect of a hyper- and superplasticizing additive including limestone microfiller on the mechanical properties of fine-grained carbonate concrete has also been studied. The main parameter of concrete properties considered in this paper is stress intensity factor. It is determined in conducting incongruent tests of concrete samples-prisms for bending in accordance with the present standard.
Highlights
In addition to internal forces, the action of loads is restricted by dissipative forces that cause energy dissipation in structures during loading
The energy dissipation due to internal friction and structural hysteresis occurs during gradual loading and is caused by microraptures and brittle dislocations appearing as small abrupt dynamic strains on microlevels [3]
Evaluation of the stress intensity factor is made by the standard test-in geometry formula
Summary
In addition to internal forces, the action of loads is restricted by dissipative forces that cause energy dissipation in structures during loading. The energy dissipation due to internal friction and structural hysteresis occurs during gradual loading and is caused by microraptures and brittle dislocations appearing as small abrupt dynamic strains on microlevels [3]. These are inherent in concrete as an anisotropic and inhomogenius material. These processes in individual structures are usually not taken into due account in simplified designing of structures on carbonate fine- grained concrete that reduce the design to a system with a single degree of freedom [4,5].
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