Analysis of concrete deformation diagram, received by different ways of formation, and their separate layers

Abstract

The article covers the processes that occur during centrifugation and vibration centrifugation of ready-mix concrete. It dwells upon the conditions of specific (variational) structure formation of as-formed centrifuged concrete, the outer layer of which is formed mostly by coarse aggregate with an interlayer of cement-water paste; the closer to its inner surface, the higher the content of small particles of dense aggregate and cement-water paste. Having conducted the research, the authors plotted and analyzed stress-deformation diagrams of concrete samples and their separate layers acquired through various molding processes. They studied different concrete mixes with varied combinations of aggregate and dispersed fiber. A mix of vibration centrifuged concrete with combined aggregate (granite + lightweight expanded clay aggregate) and combined fiber (steel + basalt) was chosen for further research. One diagram was plotted for vibrated concrete, which has an even distribution of properties over the cross sections; three diagrams were plotted for centrifuged and three – for vibration centrifuged concrete (one for each layer: outer, middle, and inner). The experimental data was analyzed.