METHOD TO PRODUCE HEAT RESISTANT CONCRETE MIX BASED ON LIME-SLAG BINDER AND METHOD TO PRODUCE ITEMS FROM HEAT RESISTANT CONCRETE MIX Russian patent published in 2011 - IPC C04B28/08 C04B40/02 

FIELD: construction.

SUBSTANCE: invention may be used for lining industrial heat aggregates, operating at the temperature of up to 1350°C and, in particular, for lining of brick burning cars. The method includes mixing of a chamotte filler with fraction of 5-10 mm and less than 5 mm, a self-decomposing ferrochrome slag and an aqueous solution of caustic soda. Fireproof fibre and portland cement are added into a dry mix prior to tempering with the aqueous solution of caustic soda at the following ratio of components, wt %: Chamotte of fraction 5-10 mm 30-31; Chamotte of fraction less than 5 mm 28-30; Self-decomposing ferrochrome slag 23.5-25.5; Solid caustic soda 3-4; Fireproof fibre 0,5-1; Portland cement 1-1.5; Water 10-11. The method to make items from a fireproof concrete mix includes its hardening and compaction, at the same time hardening of the produced concrete mix is carried out for 24 hours during thermal treatment according to the following mode: raising temperature up to 60-65°C for 1.5-2 hr, soaking at 60-70°C for 4 hr, raising temperature up to 90-95°C for 1.5-2 hr, soaking at 90-95°C for 4 hr, raising temperature up to 110-120°C for 2 hr, soaking at 110-120°C for 7-8 hr, reducing temperature down to 50-70°C for 3 hr.

EFFECT: increased strength of concrete and heat resistance.

2 cl, 1 tbl