Methods for obtaining aggregates and/or powder-type mineral material utilizing process auxiliaries

A method of obtaining at least one of treated aggregates and treated pulverulent mineral material from a starting material comprising hardened mineral binder and aggregates, the method comprising:

• a) treating the starting material in a disintegration operation in which the hardened mineral binder is at least partly carbonated by reacting the starting material with carbon dioxide, and removed from the surface of the aggregates in the starting material so as to give a pulverulent disintegration product;
• and
• b) separating off the treated starting material at a predefined grain size limit in order to obtain at least one of the treated aggregates having a grain size of at least the predefined grain size limit and the treated pulverulent mineral material having a grain size below the predefined grain size limit,
• wherein at least one process auxiliary selected from the group consisting of at least one of polycarboxylate ethers and esters (PCE), glycols, organic amines, ammonium salts of organic amines with carboxylic acids, surfactants, gemini surfactants, calcium stearate, alkoxylated phosphonic or phosphoric esters, propane-1,3-diol, carboxylic acids, sulfonated amino alcohols, boric acid, salts of boric acid, borax, salts of phosphoric acid, gluconate, iron sulfate, tin sulfate, antimony salts, alkali metal salts, alkaline earth metal salts, lignosulfonates, glycerol, melamine, melamine sulfonates, water absorbents in a form of a superabsorbent polymer or in a form of a sheet silicate, anticaking agents, sugars, sugar acids, sugar alcohols, phosphates, and phosphonates, is added to the starting material before the disintegration operation a), during the disintegration operation a), and/or during the separation b).