The influence of dropping out of kamnedrobleniya and mineral filler, included in its composition, the fine-grained characteristics of self-compacting concrete.Studies have shown the efficacy of combined use in the composition of the fine self-compacting concrete dropping out of kamnedrobleniya fractions of 2.5-5 mm, and mineral filler mixture fractions 0-2,5 mm. At the optimum dosage of the products of kamnedrobleniya and modifying additives in the composition of fine-grained mixtures ensure the required flow characteristics of the concrete mix achieved the required strength of the concrete. Mineral filler – dust component of dropping out of kamnedrobleniya allows to increase the total volume of the test binder, sufficient to fill the intergranular voids and coating grains of a filler, and contributes to water-holding capacity and the persistence of the mixture.
Keywords: kamnedrobleniya screenings, mineral filler, fine self-compacting concrete, superplasticizer, water-retaining additive, the spreadability of the mixture, keeping the mixture, the strength of concrete
The influence of viscosity modifier brand BASF on rheological properties of self-compacting mixtures and the kinetics of curing of concrete. When determining the spreadability of the mixture with the locking ring installed, that the use of the modifier with water-retention effect increases the fluidity of the mixture, despite the presence of obstacles. During the complex introduction of superplasticizer and viscosity modifier was an increase in water demand of the mix, resulting in a loss of concrete strength. The possibility of obtaining smart dynamic concrete and the effectiveness of the use of the viscosity modifier in combination with various additives should be set on the utilization of cement in concrete.To ensure the competitiveness of the smart dynamic concrete viscosity modifier it is necessary to design the composition with the lowest specific consumption of cement due to the rational grain composition of the filler and the optimum dosage of chemical additives.
Keywords: self-compacting concrete, smart dynamic concrete, a superplasticizer, a viscosity modifier, a locking ring, the spreadability of the mixture, the rheological characteristics of the mixture, the strength of concrete, the utilization rate of cement