RU1790563C - Starting mixture for making wood-base building material - Google Patents

Abstract

Usage: production of building materials from wood waste. Essence: raw CMCCV for the manufacture of wood building material contains, wt.%: Wood, crushed abs. dry 30 - 40; gypsum 30-40; ferrous sulfate 8-12; aluminum sulfate 1 - 2; quicklime hammer 2 - 3; water the rest. The raw material mixture is prepared by mixing ground wood with a solution of ferrous sulfate and aluminum sulfate, followed by the addition of gypsum and lime with stirring. The molding is carried out by extrusion. The resulting products are characterized by a flexural strength of 7.55 - 8.23 MPa, a softening coefficient of 0.71 - 1.0.1 table. V v fe

Description

The invention relates to construction and can be used in the manufacture of building materials from wood waste,

A known raw material mixture for the preparation of wood building material, including quicklime powder, dry sawdust and water. Products made from a known mixture are characterized by a flexural strength of about 3 kg / cm.

Closest to the invention in technical essence is a raw material mixture for the manufacture of wood building material, including wt.%:

Chopped wood 25.0-25.4 Gypsum 44.3-44.8 Water 24.1 -24.6 Hydrolysis

lignin 5.4-6.5. A disadvantage of the known raw material mixture is the poor processability of the product manufacturing process and their low water resistance.

The aim of the invention is to improve the manufacturability of the manufacturing process of a building product and increase its water resistance.

The goal is achieved in that the known raw material mixture for the manufacture of

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The building material, including ground wood, gypsum, water and the additive, as an additive, contains ferrous sulphate and aluminum sulphate and additionally quicklime powder, in the following ratio, May. %:

Wood% ground (abs. Dry). 30-40 Giggs 1 30-40. Divalent ferrous sulphate 8-12 Aluminum sulphate 1-2 quicklime lime 2-3 Water Else When preparing the raw material mixture, crushed Timber, abs. divalent aluminum sulphate.

The raw mix is prepared as follows, -;

The crushed wood, abs. Dry, is mixed with a pre-prepared solution of ferrous sulfate and aluminum sulfate.

0

5

0

5

0

Gypsum and lime are added and mixed thoroughly.

The finished mixture is formed by extrusion.

Samples of 40 x 40 x 160 mm in size were prepared and kept for 24 hours under natural conditions.

The test results are shown in the table.

Improving the processability of the process 113gtb § Flax of building products from the proposed raw material mixture provides only by the joint introduction of ferrous sulfate, aluminum sulfate to reduce with quick hammer. Bivalent iron sulphate ensures the stability of the process, being an intensifier of the initial setting and subsequent hardening of the raw material mixture. The introduction of quicklime with ground provides a more intense rate of hardening of the press mass and makes it possible to obtain almost dry parts and to get rid of unwanted lateral deformations of the parts without connecting additional drying chambers to the production chain and raising the temperature in them. The introduction of aluminum sulfate simplifies the extrusion process.

Formula and raw material mixture for the manufacture of wood building material, including crushed wood, gypsum, water and an additive, characterized in that, in order to improve the manufacturability of the manufacturing process of the building product and To increase its water resistance, it contains ferrous sulfate and aluminum sulfate as an additive, and additionally non-carbohydrate lime.

Tayu, in the following ratio of components, wt.%:

Wood chop

chenna (abs. dry)

Gypsum

Iron sulfate

divalent

Aluminum sulphate

Hammer Lime

Water

30-40 .30-40

8-12 1 -2

2-3

Rest