INFLUENCE OF EXPANDED CLAY WASTE ON CONCRETE PROPERTIES

Abstract The chemical composition of expanded clay, its physicochemical properties and granulometric composition were studied. The effect of expanded clay dust additive – waste from expanded clay production (Azerbaijan) on the compressive and flexural strength of concrete was investigated. It was found that the introduction of expanded clay additive in the amount of 2-10% slightly reduces the compressive strength from 46.2 to 44.5 MPa, and the compressive strength from 29.8 to 28.3 MPa passing through a maximum at 4% expanded clay to 30 MPa, respectively. An increase in the expanded clay content above 10% is accompanied by a decrease in the strength of concrete.