Purpose. Isolation of the aluminosilicate fraction from fly ash, study of
physical and mechanical properties of binders obtained from TPP wastes.
Methods. Ash, carbon concentrate (underburn), ash concentrate and
products of their treatment with reagents were tested by optical methods.
The morphology of the particles of the subjects of inquiry was studied with
the scanning electron microscope REM-100. The composition of the ash
phases was investigated using the X-ray diffractometer DRON-2.
Findings. The technology of sorbents based on coal combustion
products through a variety of methods was researched. It is shown that these
sorbents are distinctive because their structure has non-localized pi-electrons
of the graphite-like networks of crystallites of carbon. This circumstance
determines not only the uniqueness of electro-physical properties of coal but
also adsorption, redox, chemisorption processes on the border of coalslurry.
The listed circumstances allow you to use the original methods of
chemical and mechanochemical modification of the surface chemical and
coal, due to introducing desired donor and acceptor atoms in carbon frame,
which increases the absorption capacity and selectivity carbon sorbents.
Practical implications. The article presents the results of receipt of
binders based on TPP ash. It has been shown that a component of the fly ash
is aluminosilicate spheres that can be used in the production of lightweight
concrete. It is proved that the result of mechanochemical activation mixture
consisting of alumino-silicates, resulting lightweight concrete has high
strength 7-8 MPa, which allows, while maintaining the technical
characteristics save from 20 to 30 % of binder. Concrete obtained based on
aluminosilicate spheres separated from fly ash may be used to prepare the outer wall construction, small building blocks, as well as monolithic
housing. In comparison with known compositions keramsit compositions
comprising TPP waste
