Zagorodnyuk L.Kh.

Doctor of Engineering Sciences (Advanced Doctor), Professor, Belgorod State Rechnological University named after V.G. Shukhov, Russia

BINDER COMPOSITIONS BASED ON PORTLAND CEMENT AND VOLCANIC ASH

https://doi.org/10.58224/2618-7183-2022-5-4-30-38
Abstract
Today, preference is given to composite binders. The use of dispersed mineral fillers makes it possible to realize the potential of binders to a large extent, which leads to an increase in the physico-mechanical, operational and technical properties of composite binders, as well as building materials based on them, and reduces the consumption of expensive binders. The creation of highly effective composite binders is based on the management of their production technology at all stages: the selection of raw materials, the development of optimal compositions, the use of mechanical activation of raw materials, the modification of composite binders with functional chemical additives, and some other methods. The use of volcanic ash in the world is quite diverse, it is used not only as additives for building materials, but also it has found its application in medicine. Many countries are beginning to use volcanic ash as a building material. The article presents the results of obtaining binder compositions of optimal composition based on Portland cement and volcanic ash. Experimental studies of the granulometric composition have been carried out, the results of tests of binder compositions of the compositions: cement – volcanic ash, prepared in a vibratory mill, have been presented. The results of physical and mechanical tests of binder compositions with different content of volcanic ash, activated for 10 and 20 minutes in a vibratory mill, have been obtained. Research work has been carried out to study the microstructure of volcanic ash.
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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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