Universal Model of Concretes’ Compression-tension Creep Nucleus

The study of the rheological properties of cement-based composite materials under different conditions of loading and impact is necessary for the development of a complete theory of structural calculation and corresponding improved calculation methods. The article examines the dependence of the rheological characteristics of concrete on the moisture content and age of the materials. Short-term and long-term (creep) tensile tests of samples of traditional (concrete, fine-grained concrete) and new (steel-fiber concrete, basalt-fiber concrete) composites have been carried out. Specimens were saved and tested in a “standard” environment – air relative humidity  100% , temperature 0 T C   20 1 . 0 t  3,7,14, 28,60 and 180-day specimens’ creep were tested. 0 t  28 -day specimen were received standardly. Creep experiments duration 0 ( ) t t  was 180 days. Research data defined creep nucleus of various moisture content and age composites. It was found that the dependence of the creep cores on the age of the materials is well reflected by the qualitative function. An image of the function is developed and the magnitude of quality indicators for composites is determined. An image showing the dependence of the core age of the compressive-tensile creep of composites was created. As a result of the conducted research, a new type of universal model of compressive-tensile creep cores of cementbased composites was created, which takes into account the age and moisture content of the materials.