Concretes on mixed filler and structured polyspirt water

Abstract

One of the effective materials for the manufacture of roads and hydraulic structures, which is quite resistant to environmental influences, is concrete based on Portland cement. The advantages of building roads with cement-concrete pavement are obvious. However, it has significant shortcomings, and due to the lack of specialists in this field, builders have distrust and even fear of such construction. Therefore the main question remains unresolved: how in this case to reduce risks and to provide necessary quality of coverings from monolithic cement concrete. Among the many factors influencing the strength of concrete, this paper examines the influence of qualitative and quantitative composition of aggregates in the presence of polyalcohol in ultra-low concentrations. The aim of the research was to obtain concrete with increased compressive strength and speed of its formation due to the use of polyalcohol and mixed fine aggregate. To achieve this goal it is necessary to solve the following tasks: to determine the degree of influence of polyalcohol on the compressive strength of fine-grained concrete on a mixed aggregate; determine the optimal ratio between the components of the specified concrete. The results of studies of the impact of the content of iron ore beneficiation in the fine aggregate of fine-grained concrete showed that firstly there is their optimal content in the aggregate, and secondly the introduction of polyalcohol into the concrete increases its strength, but the presence of waste from mining and processing plants the degree of increase in strength, which remains quite high. As the results of experiments show, when the content of waste from mining and processing plants in the aggregate in the amount of 30… 40%, the maximum increase in concrete strength is achieved. The concentration of the polyscohol solution, which provides the maximum increase in the strength of concrete is in the range of 0.004… 0.006 M.