METHOD TO MANUFACTURE CEMENT WOOD Russian patent published in 2012 - IPC C04B18/26 

FIELD: construction.

SUBSTANCE: method of manufacturing includes dosing, mixing to a homogeneous condition, moulding and hardening of a raw mixture, containing a wood filler and an ash-alkali binder, the wood filler is pine chips with particle size of 0.14-10 mm, apparent density of 125-150 kg/m³, moistened to 20% moisture at the following ratio of the particle size, wt %: 5-10 mm -12.5; 1.25-2.5 mm -76.0; 0.315-0.63 mm - 10.3; 0.14 mm and below -1.2, and the binder is an ash-alkali binder, containing fly ash produced from burning brown coals from KATEK at TPP - 7 in Bratsk, Irkutsk region, with apparent density ρ_a=930 kg/m³, and liquid glass with a silicate module n=1 and density of 1.36-1.40 g/cm³, manufactured from multi-tonnage wastes of ferrosilicon from the Bratsk ferroalloy factory of microsilica and containing 5-7% of highly-dispersed flaked graphite and 3-6% β-carborundum at the following ratio of components, wt parts: chips 18-22; fly ash 38-42; liquid glass 38-42, and hardening is first carried out in a steaming chamber at T=80-85°C according to the mode 2+2+2+2 hr, and then in air-dry conditions at T=20±2°C or 18-22°C for 60 days.

EFFECT: reduced density of a cement wood, higher heat insulation properties of a cement wood.

1 cl