SU1167171A1 - Raw mixture for manufacturing building articles and method of preparing same - Google Patents

Abstract

1. Raw mix for the manufacture of building products, including crushed wood, portland cement, lime and water, characterized in that, in order to increase the impact strength of the products, reduce the consumption of wood and simplify the technology, it contains wood in the form of fiber and additionally calcium chloride , in the following ratio, wt.%: Wood fiber 2-8 Portland cement 31-47 Lime15-25 Calcium chloride 5-8 Water Remaining 2. Method of preparing the raw mix for the manufacture of building products, including preliminary (L preparation of the components, mixing them in a dry form, mixing and final mixing, as indicated by the fact that the preliminary preparation of the components is carried out by joint processing of cement and wood in an aggregate of a shock-abrasive effect for 1-10 minutes, and then Pre-burnt lime is introduced into the resulting solution and mixed for 1-5 minutes, mixing is carried out with calcium chloride solution at a concentration of 15-22.2%, and final mixing is carried out for 2-10 minutes.

Description

eleven

The invention relates to the production of building products, produced primarily by extrusion, for example, plate materials, sheet and profile products, and the like.

The aim of the invention is to increase the toughness of products, reduce wood consumption and simplify technology.

The resulting mixture has good plasticity, a high ratio of internal and external friction coefficients (more) and is extruded to obtain slabs or complex profiles. The plastic and molding properties required for extrusion molding are ensured by the formation of a calcium chloride oxychloride gel structure CaClj3SaO-12HjO in the mixture. The chloride ion ensures the neutralization of wood leaching products, which can have a damaging effect on the cement matrix. The combined treatment of cement and fiber in a shock-abrasive aggregate improves its adhesion due to the packing of cement particles on the fiber, thereby increasing the toughness of the material.

Examples Composition.Family known mixture. A mixture of composition, wt.%;

712

Wood chips 18.8 Portlandzeme nt 52.4 Aluminum sulfate 1.0 Liquid glass 0.6

Lime0.8

Water26,4

The mixture could not be extruded due to the low plasticity and flat molding properties (the ratio of internal and external friction coefficients is 0.8).

The samples are made by pressing and have a impact strength of 1.6 kJ / mCh.

The compositions of the proposed raw mix.

The mixture of components (according to the ratio given in Table 1) is prepared in this way. Pre-process cement and wood in the following aggregates; according to example 1 - in a disintegrator, according to example 2 and 3 - in a vibrating mill, 4 in a ball mill. Then, pre-slaked lime is added and mixed dry, after which it is closed with calcium chloride solution and finally mixed before being fed to the extrusion. press

The parameters for the preparation of the raw mix and the physicotechnical properties of the material are given in Table. 2 and 3.

Table 1

37 38 31 47

2 5 8 7

2 3

four

28 34 31 26

8 6 7

25 17 23 15

five

2

22.2

5 1 5 3 15.0

1 18.4

5 16.1

ten

Indicator

Bulk weight, kg / m

Flexural strength, MPa

Water absorption, wt.%

Frost resistance,% loss of strength (after 25 cycles)

Impact viscosity, kD s / m

2.0

2.8

2 2.3 2.2

4 3,5 2,6

5 2.8 2.0

0

.Table 3

prototype prototype

1100-1400

9.0-12.0 16

20 1.6

Claims (2)

1. The raw material mixture for the manufacture of building products, including crushed wood, Portland cement, lime and water, characterized in that, in order to increase the toughness of the products, reduce wood consumption and simplify the technology, it contains wood in the form of fiber and additional calcium chloride, in the following ratio of components, wt.%: Wood fiber Portland Cement31-47 Lime15-25 Calcium Chloride 5-8 Water Else 2. A method of preparing a raw mix for the manufacture of building products, including the preliminary preparation of the components, mixing them in a dry form, mixing and final mixing, characterized in that the preliminary preparation of the components is carried out by joint processing of cement and wood in an impact-abrasion unit for 1-10 minutes, and then pre-extinguished lime is introduced into the mixture and mixed for 1-5 minutes, mixing is carried out with a solution of calcium chloride concentrate ii 15-22,2% and the final mixing is carried out for 2-10 min.