Open AccessEffect of modifiers and mineral additives from industrial waste on the quality of aerated concrete products
Author(s) -
Yerlan Sabitov,
Duman Dyussembinov,
Daniyar Bazarbayev
Publication year - 2021
Publication title -
technobius
Language(s) - English
Resource type - Journals
ISSN - 2789-7338
DOI - 10.54355/tbus/1.4.2021.0010
Subject(s) - materials science , portland cement , composite number , fly ash , polyvinyl alcohol , polyvinyl acetate , aeration , compressive strength , mixing (physics) , cement , absorption of water , dispersion (optics) , composite material , filler (materials) , emulsion , polymer , lime , waste management , metallurgy , chemical engineering , physics , optics , quantum mechanics , engineering
The given article is devoted to research of influence of polymer modifiers and mineral additives on quality of composite aerated concrete products. When selecting the composition of composite aerated concrete local raw materials and components were used: portland cement, sand, aluminum powder, polyvinyl acetate, fly ash, post-alcoholic bard and whey of milk. Preliminary polyvinyl acetate was combined with binder mixing water at a temperature above 55ºC to obtain a readily soluble polymer emulsion. Dispersion was carried out with a rotary-pulsation apparatus at a pressure of 0.5-1.0 MPa and a rotor speed of ~1200 rpm. In the same apparatus the complex modifier was produced. The offered technology of production of a complex modifier seems to be the most effective for composite aerated concrete. It made it possible to reduce water absorption and capillary suction of composite aerated concrete by an average of 25% and 45%, respectively. Moreover, different combinations of fly ash, polymer and modifier made it possible to achieve optimal values of thermal conductivity, compressive strength and frost resistance of composite aerated concrete.