Increasing the Level of Properties of Composite Materials for Civil Engineering Geoconstruction with the Use of New Generation Additives

It is shown in the paper that the effective chemical activation of cement-containing composite mixture with the help of a new generation of a complex nanostructural additive ensures the creation of high-strength fine and heavy concretes with improved strength and deformation characteristics. The use of the proposed complex additive enormously increases the hydration activity of the hardening system, having the chemical and thermal effects on it resulting from the rational use of heat released in the process of hydration reactions and ensuring the creation of a composite building material with a new level of physical and mechanical properties. During the experiment it was found that the developed complex nanostructured additive has: highly plasticizing effect; increases the compressive strength, but to a greater extent, the tensile strength in bending (by 53–59)%, increases the crack resistance of the material by (16–17)%;—increases by 2 times the frost resistance of concrete and its water resistance by 50%. Nanomodified concrete with achieved physical and mechanical parameters is recommended for the manufacture of responsible structures, including cold regions, when using problem soils.