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The article deals with the use of arbolite consisting of mineral binders and aggregates from logging waste and other organic raw materials, as well as chemical additives and water. Unlimited raw materials allow us to consider the production of arbolite as one of the most important areas in the development of progressive building materials. The technology for the production of arbolite makes it possible to use waste from agricultural industries with great efficiency. To mix organic raw materials particles with a binder, mixers are required, which are the main focus of the article. During the research, the method of patent information search was used, the role of this building material was emphasized and the relevance of scientific developments in the field of its production was discussed. The article proposes a variant of a mobile device for the production of arbolite. The main technical result of using the proposed design is achieved through the introduction of a double screw mechanism for mixing particles of multidirectional two-sided action. By rotating several screw spirals, volumetric mixing is carried out, which improves the quality and speed of mixing particles with a binder and water without significantly complicating the design and increasing its dimensions. [ABSTRACT FROM AUTHOR]

The world and domestic experience of the development and design of energy-efficient solar heating systems for residential and public buildings based on evacuated solar collectors is considered. The areas of effective use of evacuated solar collectors with direct heat transfer water, with U-shaped tubes and with heat pipes are determined. [ABSTRACT FROM AUTHOR]