Abstract: This invention relates to a novel ceramic mass or material and the use of same in the building materials industry for manufacturing bricks, ceramic stones, roofing tiles, large block and the like. A formable ceramic mass is prepared by mixing clay, a filler such as sand, calcium hydroxide, which can be in the form of slaked lime, and an aqueous solution of solidification activating agent. The formable mass is then shaped, e.g. by plastic moulding into uncured building elements which are in turn subjected to heat treatment, including a preliminary drying, a thermal treatment in a saturated vapour atmosphere, and a subsequent further heating and drying with a gradual lowering of moisture content. The preliminary drying is carried out at a temperature of 60.degree.-70.degree. C. to reduce the moisture content to 12-14%. The thermal treatment is performed at a temperature of 95.degree.-100.degree. C.