Modified Composite Fine-Grained Concrete

The paper presents the findings of the experimental investigation conducted to identify the effect of composite admixtures including a plastifying agent and soot production wastes on the proper-ties of fine grained concrete. The joint effect of the cement and sand matrix and soot wastes was investigated, too. The investigation identified the effect the complex admixture of a plastifying agent and soot wastes on structure formation, physical, mechanical properties and strength of the fine grained concrete. It was found that the micro particles of soot wastes concentrate the grains of the quartz sand around them as well as the products of the new formation of cement stone such as hydrated calcium silicate and others. This ensures a higher density of micro structure and increased strength of the fine grained concrete.