Abstract: A method of producing Keramzit by means of treating clay to form a clayey mass, subsequently granulating it, drying the granules at a temperature of 100.degree. to 150.degree. C., heat-treating the dried granules at a temperature of 200.degree. to 500.degree. C., calcining them in two stages-at a temperature at the first stage of 800.degree. to 1,150.degree. C. for 0.5 to 10 minutes and at a temperature at the second stage of 1,150.degree. to 1,250.degree. C. for 1 to 5 minutes, and cooling the Keramzit produced.The Keramzit produced according to the proposed method finds application in manufacturing all types of light-weight concretes.The method makes it possible to produce a light-weight Keramzit having a low bulk density from 100 to 400 kg/m.sup.3 and a strength on compression in a cylinder of from 3 to 22 kgf/cm.sup.2, and a high-strength Keramzit having a bulk density of from 550 to 1,100 kg/m.sup.3 and a strength on compression in a cylinder of from 37 to 200 kgf/cm.sup.2.