Obtaining the high-performance concrete for railway sleepers in Russia

Abstract

The paper presents the recommendations on the concrete production for the precast prestressed reinforced concrete constructions (sleepers, etc.) with double turnover forms per day by using the integrated approach, involving the use of ordinary raw materials, effective modifiers of concrete structure, low-temperature of heat-steaming treatment. Such concretes should provide the required transfer strength (strength at the moment of release tension bars) in a relatively short time 10-12 hours. The implementation of the following measures requires for obtaining the high-performance concrete for sleepers in the conditions of the existing technological equipment of domestic plants: increasing the density of cement stone due to the use of water-reducing admixtures, improving the structure of concrete due to the use of low heat-steaming treatment, the account of activity of Portland cement at low temperature of heat-steaming treatment, use of active mineral component.