PROCESS OF MANUFACTURING HEAT-RESISTANT CONCRETE MIX AND PROCESS FOR MANUFACTURING PRODUCTS FROM HEAT-RESISTANT CONCRETE MIX Russian patent published in 2006 - IPC C04B28/08 C04B40/02 C04B111/20 

FIELD: manufacture of building materials.

SUBSTANCE: invention relates to a process for manufacturing products from heat-resistant concrete mix and can be used for lining of industrial heat assemblies operated at temperature up to 1300°C, in particular for lining of brick firing small trucks. In a process of manufacturing heat-resistant concrete mix including mixing chamotte aggregate and self-degrading ferro-chromic slag (22-26%), said chamotte aggregate employing chamotte fraction 5-10 mm (3-32% of the total mix) and less than 5 mm (30-32%), while after indicated mixing sodium hydroxide in the form of aqueous solution is added to resulting dry mix. Final mix contains 10-13%. In a process of manufacturing products from heat-resistant concrete mix, containing self-degrading ferro-chromic slag and chamotte aggregate including curing operation, manufacture of indicated concrete mix is accomplished as above, after which mix is compacted and curing thereof is carried out as heat treatment according to following regime: raising temperature to 60-70°C for 2.0-2.5 h, ageing at 60-70°C for 14 h, raising temperature to 90-95°C for 1.5-2.0 h, ageing at 90-95°C for 5 h, raising temperature to 110-120°C for 2.0-2.5 h, ageing at 110-120°C for 10 h, and lowering temperature to 50-70°C for 3-4 h.

EFFECT: improved performance characteristics of heat assembly members due to increased strength and heat resistance of concrete.

2 cl, 1 tbl