Review article

The article presents the results of research on the production of a complex organo-mineral additive based on super-plasticizer and nanoparticles of various nature providing targeted control of the processes of structure formation and improvement of the properties of the cement composite. It is shown that the use of the developed modifier leads to an improvement in the technological properties of the system and an increase in the strength characteristics of cement stone, especially in the early stages of hardening. The optimal combination of nanoparticles in the composition of a complex additive has been established, ensuring maximum effect. X-ray phase analysis revealed a change in the composition of hydration products under the influence of nanomodifiers, resulting in a decrease in the content of portlandite and an increase in the proportion of calcium hydro-silicates. The study of the microstructure of the modified stone indicates the formation of a more dense and homogeneous structure, compared with the original cement composite, which is characterized with high dispersion and a reduction in defect zones.