The article discusses the various stages of the study of quarry sand as a component of the cement-sand mixture. Two large-scale stages are designated: drying and sieving. The drying stage for different layers (upper, middle, lower) of quarry sand is given. The results of moisture content of sand weighing from 100 to 5000 g for different layers are given. The screening stage for various layers of quarry sand is given. The granulometric (grain) composition of various layers of quarry sand was determined experimentally according to the normative methodology. The results of partial and total residuals for each layer of sand are given. Size moduli are calculated for different layers of sand. The equipment used for drying and screening quarry sand is illustrated. The experimentally theoretical necessity of the preliminary stages of preparation (drying and sifting) of quarry sand before using it as an integral part of the cement-sand mixture for the production of bricks has been confirmed experimentally.
Keywords: quarry sand, drying, drying, sifting, screening, cement-sand mixture, humidity, granulometric composition, particle size modulus
The article discusses the various proportions of the components of the cement-sand mixture for the production of bricks for the construction of private houses. Particular attention is paid to the values of the draft of the cone, as one of the indicators of the mixture. Tables are given with a description of the different composition of the mixture for each component. The results of an experiment to study the effect of different ratios of components are presented. The equipment for manual and automatic molding and creation of finished products from the resulting mixture is illustrated. A conclusion is given on the possibility of using a specific mixture in the production of bricks.
Keywords: brick, cement, sand, water, cement-sand mixture, cement mortar, water-cement ratio, composition selection, construction, production
The article presents the results of a comparative analysis of the authors of the main indicators in the calculation of asbestos dust emissions in the atmosphere air, in accordance with standard procedures and their impact on quality of life.
Keywords: diversification of management, production diversification, financial and economic purposes of a diversification, technological purposes of ensuring flexibility of production