| 摘要 |
FIELD: building. ^ SUBSTANCE: invention refers to production of building materials and can be implemented at fabrication of items out of dolomite non-fired heat resistant concretes produced without preliminary firing. The composition for fabrication of non-fired dolomite heat-resistant concrete contains, wt %: dolomite filler 65-87, fine ground dolomite 6-16, fine ground caustic dolomite 2-8, fine ground sodium silicate 2-5, sodium silicate in form of nano-dimension particles 1-2, fine ground diatomite 6-16, caustic dolomite in form of nano-dimension particles 2-4 and water out of calculation W/T 0.12-0.14. Procedure for fabrication of non-fired dolomite heat-resistant concrete out of the above said composition consists in separate crumbling of components and in producing fine ground said components, in successive separate conversion of part of sodium silicate and caustic dolomite into nano-dimension particles by means of dehydrated dispersion of hydrated sodium silicate and caustic dolomite fine ground to specific surface 2500-3000 cm2/g at temperature 200-800C, in mixing dolomite filler, fine ground dolomite, caustic dolomite and sodium silicate, in adding while mixing to their mixture the water mixture of sodium silicate and caustic dolomite; also the water mixture has temperature of 80-90C and mixture of sodium silicate and caustic dolomite is represented in form of their nano-dimension particles; further water is added at temperature of 80-90C; the produced mixture is mixed, items are mould out of it and treated by thermo-shock at temperature of 250-300C during 1-2 hours. ^ EFFECT: enhanced strength and thermal resistance of concrete. ^ 2 cl, 1 ex |
