Keywords: granulometric composition

RESEARCH ON THE STRUCTURE OF CLAY RAW MATERIALS FOR CERAMIC PRODUCTS

https://doi.org/10.34031/2618-7183-2020-3-4-13-23
Abstract
Abstract: the research uses some methods for determining materials, strictly applying the current standards and requirements of the Russian Federation. The degree of scientific development of this research is that specialists of the Department of Engineering Physics and Materials Physics of Engineering Faculty of Bashkir State University and the laboratory of JSC "Ceramics" of the Republic of Bashkortostan conducted research in the field of ceramic materials science for construction purposes. The methodological basis of the research is based on well-known methods of studying the structure of clay raw materials suitable for the production of construction products, with the choice of a stable light range of products and eliminates cracking in the technological process of brick production. The correct composition leads to a reduction in energy consumption without compromising the physical and mechanical characteristics of products.
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THE EFFECT OF LONG-TERM STORAGE OF ELECTRIC STEEL SMELTING SLAGS IN DUMPS ON THEIR PROPERTIES

https://doi.org/10.34031/2618-7183-2018-1-1-32-39
Abstract
Сonstruction, repair and reconstruction of roads require high costs of mineral raw materials in the form of sand, gravel, mineral powder. However, its reserves on the territory of our country are distributed unevenly, which causes significant transportation costs for the delivery of mineral resources to construction sites. In addition, mineral resources are inevitably reduced over time, which requires extensive involvement in the construction of roads of non-traditional types of raw materials, as well as industrial waste.
The paper presents the results of studies of the properties of electric steel slag, the current output and stored in the dumps for several years. The main component of electric steel-smelting slags, both fresh and dumped, lying in dumps for about 20 years, is shannonite or γ-modification of calcium orthosilicate C2S. It has been established that the mineralogical composition of the Oskol Electrometallurgical Combine's slag is represented by hematite, wuistite, calcite, periclase, and also portlandite, formed during quenching of lime. Analysis of diffractograms of slags of different shelf life shows that in the initial periods of slag storage in the dumps there is a final quenching of lime and its carbonization with the formation of calcite. The results of the determination of the granulometric composition of the slag of different storage periods showed a decrease with time of the number of fine fractions and an increase in large fractions. It is established that when using electric steel-smelting slags in the construction and repair of highways, it is necessary to take into account changes in the physical and mechanical properties of materials. The processes that take place during the maintenance of slags in dumps determine the suitability of the use of slag mineral materials in road con-struction.
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THERMAL INSULATION SOLUTIONS OF THE REDUCED DENSITY

https://doi.org/10.34031/2618-7183-2018-1-1-40-50
Abstract
Today energy saving and energy efficiency improvement in Russia are priority directions of the country’s energy policy. First of all, when creating an energy-efficient house, it is necessary to think about preventing heat losses through enclosing structures, and only then about reducing lighting costs, optimizing the work of building engineering systems, and the introduction of alternative energy sources. Materials for thermal insulation, the most important characteristic of which is the thermal conductivity, do the main role in the provision of optimal conditions of indoor air. The creation of thermal insulation solutions with improved thermal protection properties is a very acute problem at the moment. In this connection, the purpose of this work was to create effective compositional binders that contribute to the reduction of the density of thermal insulation materials.
Within the framework of the energy-saving program and the development of housing construction of the Russian Federation and the implementation of the Federal Law №185-FZ “On assistance to the reform of housing and communal services”, the creation of new effective building materials with high performance and thermal protection characteristics that can compete with foreign analogues is of great importance.
This article presents new approaches to improve the efficiency of dry heat-insulating mixtures, taking into account the law of affinity structures, which provides for the design of composites using fillers and composite binders of reduced density. Thermal insulation solutions on the basis of dry construction mixtures have superior technology, physical and mechanical and operational performance.
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