On the Mechanism of the Influence of Various Micro-Fillers and Chemical Additives on the Microstructure and Strength of Cement Paste

Abstract

The paper examines the mechanism of the influence of complex micro-fillers and chemical additives on the microstructure formation and physical-mechanical properties of cement paste. The hydration and structure formation processes in binary cement composites with the introduction of active mineral admixtures and superplasticizers are analyzed. It is experimentally confirmed that the use of an optimized composition of micro-fillers contributes to a significant compaction of the cement matrix structure, a decrease in total porosity from 14.5% to 9.2%, and an increase in compressive strength by 33–34%. The research results demonstrate the effectiveness of using these composites in the production of resource-saving high-strength concretes adapted to the regional climatic conditions.