Martsikh A. Waterproofing mortars based on portland cement, modified by complex additives containing untreated carbon nanotubes

The object of research - especially the processes of structure formation of Portland cement in the presence of a plasticizer, in which the dispersed crude carbon nanotubes, as well as the management of the properties obtained on the basis of waterproofing solutions by controlling their structures at both the meso and micro levels, as well as at the nanolevel. Research subject - waterproofing mortars with improved performance characteristics based on Portland cement, modified by complex additive comprising aluminum silicates of the layered structure and dispersion of untreated carbon nanotubes in different types of plasticizers. Research methods - modern methods of physical and chemical analysis; statistical methods of experimental design. Novelty - is theoretically grounded and practically proved the possibility of directional control the processes of structure formation of cement compositions with the introduction of complex supplement that includes aluminum silicates of the layered structure and dispersed in the plasticizer untreated carbon nanotubes, which are manifested in the creation of an ordered solid structure by epitaxial growth of hydration products on the surface of carbon nanotubes. A compatible plasticizer action and carbon nanotubes, and shows that the synergistic effect of the administration of the two components takes place using plasticizers melamine and lignosulfanatnogo composition, as evidenced by the growth of the strength and water resistance of the artificial stone. It has been determined that when using Portland cement with the addition of granulated blast slag (up 35%) and aluminum silicates of the layered structure (bentonite clay to 7.5%), the impact of untreated carbon nanotubes dispersions in plasticizers increases: an improvement in the basic physical, mechanical and performance properties compared samples of similar composition, but without nanotubes. It was found that the resulting effect of the introduction of complex additives associated with both directed synthesis as part of artificial stone hydration products calcium hydrosilicates, and with the ability of bentonite clay is first to accumulate between the layers of water molecules and the creation of compacted layered structure by the intermolecular interaction forces, then - interoperability with products of hydration of cement paste to form a reconstituted hydroaluminosilicates. The results of the work implemented in the production of building materials. It defines the technical and economic feasibility of the development. Industry - construction.