C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
C04B38/063—Preparing or treating the raw materials individually or as batches
Grains assemblables entre eux pour former des granules, granules obtenus, procedes de fabrication et utilisation des grains et granules dans le domaine du batiment et des travaux publics