Determination of rational parameters for heat treatment of concrete mixture based on a hollow aluminosilicate microsphere
DOI:
https://doi.org/10.15587/1729-4061.2022.251004Keywords:
hollow aluminosilicate microsphere, structural effectiveness, thermal effectiveness, concrete mixture, strength, energy and heat consumptionAbstract
The research on determining rational parameters of heat treatment of a concrete mixture based on hollow aluminosilicate microspheres has defined the features of the intensifying action on the structural concrete mixture by low-pressure steam with optimum heat and mass transfer. Optimum values of temperature, humidity and speed of the medium have been identified. The obtained heat treatment parameters are subject to general regularities of structures for the formation of hydraulic bindings and are in accordance with production conditions, thus providing possibilities for their adaptation into production. The mechanisms for determining the strength of concrete stone according to the structural and thermal effectiveness of the active medium have been defined. Thanks to the strength-building mechanisms obtained, it is possible to reduce the thermal destruction capacity of the system while reducing the process heat consumption. It is confirmed that the main direction in reducing the destructive capacity is determined by the mass flow of moisture, which has the greatest heat capacity and the least thermal conductivity at the initial stages. The invention relates to periods of temperature rise and isothermal heating without impairing the mechanical properties of concrete. It is shown that the real duration excludes high-temperature destruction processes, thereby increasing the mechanical strength of concrete and reducing the overall energy consumption. Thus, there is a reason to argue that it is possible to produce strong and light concrete products under accelerated structure formation and new technologies for heat treatment of concrete based on lightweight fillers with reduced heat consumption.
Supporting Agency
- This work was carried out within the framework of the IRN research project Grant No AP09058149 «Study on electric discharge destruction of reinforced concrete products and solid waste for development of mobile complex for its recycling and disposal». The authors would like to acknowledge Science and Production Association Testing Laboratory «Quality» for the provision of research equipment and tools and Joint-Stock Company «Parasat» Scientific and Technological Center for research support.
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Copyright (c) 2022 Аlexandra Аtyaksheva, Olga Rozhkova, Yermek Sarsikeyev, Anastassiya Atyaksheva, Marat Yermekov, Askar Smagulov, Natalya Ryvkina
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