This article discusses the effect of a complex additive based on ACF or SAFA plasticizers and SOAPSTON hardener made from oil and fat industry waste on strength, homogeneity, density and the propagation rate of ultrasound in cast concrete
The article describes the importance of marginal methods of analysis in improving the efficiency of production of livestock products, in particular meat and milk, methods of its calculation based on accurate data, scientific conclusions based on the analysis of the results obtained during calculations. At the same time, the features of the marginal research method were revealed, the elasticity indicators, including as the elasticity of demand in relation to price or as the elasticity of demand in relation to income, made it possible to further clarify the situation in the meat market. Based on the variable costs applied to our marginal studies, feed costs were taken into account
This article describes the formulas, calculation procedures and calculation methods given in the European, Japanese, Russian, and American standards for the calculation of the first and second group of limit states in the design of concrete structures with composite reinforcement. Also, the main hypotheses, principles and limit values of structures in the calculation of structures with composite reinforcement are mentioned.