PROCESS FOR OBTAINING CHEMICAL COMPOSITION FOR PRODUCTION OF ACTIVE ADDITION CAPABLE OF REPLACING PORTLAND CLINKER, CHEMICAL COMPOSITION AND USE OF THIS COMPOSITION

摘要

process of obtaining chemical composition for active addition production capable of substituting portland clinker, chemical composition and use of this composition. process for obtaining a chemical composition for the production of active addition capable of substituting portland clinker comprising the following steps: (a) chemical treatment: to the residue the processing of bauxite is added limestone or calcium carbonate derivatives and sand or silica derivatives or silica clays to a sodium content of 30%, of ca 10% and not 10%; preferably sodium 2 between 30 to 40%, ca. 10 to 150%, and not between 4 and 6.0%; (b) homogenization step: the mixture obtained in the previous item undergoes the homogenization process; (c) heat treatment: thereafter the mass of the mixture obtained in process (b) is heated to a temperature between 100000 to 15000c with partial melting and color change; (d) cooling: the cooling process occurs in a satellite or grid chiller; (e) final product: the final product is that obtained when the color of the active addition is dark gray, with performance similar to fly ash and the presence of free dog less than 1.0%; (f) milling: the final product is then subjected to the milling process in conjunction with portland cement clinker to produce cements containing the active addition according to Brazilian standard nbr 12653.