New technical solutions in nanotechnology. Part 5

The new technical solutions including inventions in the area of nanotechnology and nanomaterials are efficiently applied in communal and housing services as well as in construction and other joint fields. The invention «The method to produce hardening mortar (RU 2601885)» refers to construction and can be used to stabilize the base of constructed or restored buildings and structures by means of injections. The technical result is the increased flowability of hardening mortar and, consequently, volume of the space filled with the mortar through ground gaps. The method to produce hardening mortar includes the following operations: mixing of Portland cement and water, introduction of nanoadditive and mortar treatment. The mix of nanodispersed silica dioxide particles of different specific surface is used as nanoadditive. The nanoadditive is introduced into water to obtain colloid solution of specified concentration, the solution is mechanically mixed and additionally it is treated by ultrasound. Then the colloid solution is agitated with required quantity of mixing water and later - with Portland cement. To significally increase the flowability of hardening mortar it is necessary to use colloid water solution of mixture of nanodispersed silica dioxide particles of different specific surface, with concentration about 20^35 mas.% The specialists may be also interested in the following nanotechnological inventions: the method to form crystal nanoporous oxide on the titanium-aluminium alloy (RU 2601904), nanoporous polymer foam with high porosity (RU 2561267), the method to introduce nanoadditives into polymers (RU 2585003), the method to process natural bitumen (RU 2600448), the method to produce nanosize powder stabilized zirconium dioxide (RU 2600400), raw mixture for production of foam concrete of autoclave hardening (RU 2600398), application of modified nanoparticles to timber to decrease emission of volatile organic compounds (RU 2600050), the methods to increase compressive strength of concrete with the use of nanosilica produced from hydrothermal solution (RU 2599739) et al.