Cost-effective design of long cylindrical shells of high-strength sand concrete

Abstract

The use of high strength sand concrete (HSSC) is an alternative to high-strength crushed stone concrete. Its use is economically viable for those regions of Russia in which crushed stone belongs to imported building materials. So, crushed stone is supplied to the Republic of Tatarstan (RT) from the Ural, and local sand reserves are significant.Authors give the information on the cost-effectiveness of designing prefabricated and monolithic long cylindrical shells from HSSC of B60 and B80 classes compared to heavy concrete of B20-B80 classes.The determination of the forces in the shell elements was performed by using the LIRA-CAD software package (SP). The calculation of the elements of prefabricated shells was carried out in the stages of operation, manufacture, transportation and installation. It was carried out by an engineering method according to the methodology of current standards. Calculation of monolithic shells was performed using an SP. The density of heavy concrete, its strength and deformation characteristics were accepted according to the standards. The same characteristics for HSSC were based on the results of the experiments of the department “Technology of building materials, products and structures” (TBMPS) of Kazan State University of Architecture and Engineering (KSUAE).The performed calculations showed that the use of HSSC of B60 and B80 classes compared with the heavy ones makes it possible to obtain a significant economic effect in the Republic of Tatarstan (RT). Namely: to reduce the consumption of steel (up to 30.6 % in prefabricated shells and up to 23.7 % in monolithic), concrete (up to 15.9 % in prefabricated shells and up to 14.0 % in monolithic) and the total cost of materials (up to 18.9 % in prefabricated shells and up to 20.3 % in monolithic).