The article contains a short literature review of the effects that carbon nanosystems may have on the properties of building composite materials. Highlighted are the main problems hindering nanosystems from wide industrial implementation, such as coagulation tendency of a dispersed phase, and the need for preliminary processing of nano-elements when producing suspensions with a homogeneous particle distribution. Attempts have been made to explain the mechanism leading to an increase in the main technical characteristics of materials based on mineral binders and modified by multilayer carbon nanotubes. With certain model simplifications, a calculation was made, allowing to estimate the amount of material that nanoscale products involve in the composite formation process, and showing a direct relationship between the increase in the technical characteristics of the final product and the homogeneity of the multilayered carbon nanotubes distribution in modifying suspensions.