METHOD FOR PRODUCTION OF BINDING MATERIAL FOR BUILDING INDUSTRY Russian patent published in 2002 - IPC

FIELD: manufacture of building materials. SUBSTANCE: binding material is prepared from pond acid sludges and can be used, for example, In road building. Acid sludge is first dehydrated and then mixed with deasphalting-origin asphalt in reactor. Process is carried out in presence of plasticizer, particularly still residue from butyl acrylate, methyl acrylate, methyl methacrylate, and methacrylic acid distillation stage, and resulting mix is aged for 30-40 min at 100-115 C at continuous stirring. Weight ratio acid sludge/asphalt/plasticizer is (70-80):(15-25):(3-7). EFFECT: improved manufacturability of process and quality characteristics of resulting asphalt concrete. 4 tbl, 4 ex