SU709601A1 - Method of concrete floor layout - Google Patents

Description

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The invention relates to methods for flooring industrial buildings.

The known method of arranging concrete floors is to confuse laying a layer of concrete mix, compacting this layer and subsequent impregnation (4-10 days of concrete hardening) with a solution of polyetherurethane with terminal isocyanate groups 1.

This method reduces the water absorption and wear of the concrete pavement by 10-15% as compared to the non-impregnated surface.

Technically, the effect achieved is closest to the invention: a method for arranging concrete floors, according to which, after laying and compacting a concrete layer, it is impregnated with a 60-80% solution in an organic solvent of an isocyanate-containing polymer based on transesterified triethanolamine of castor oil 2.

Such an impregnation in the surface layer provides a 20% greater wear resistance and a 50-60% reduction in water absorption, however, the wear resistance of the entire floor increases slightly.

The purpose of the invention is to increase floor durability.

This is achieved by the fact that the proposed method of arranging the floor by laying the concrete mix, compacting it and then impregnating the concrete with an isocyanate-containing compound, the impregnation is carried out with a 70-85% solution in an organic solvent of the oligoaryl isocyanate of the general formula

, (NCO) CH) C6H4NCO, where n 1-4. Oligoaryl isocyanate contains 23–29%. isocyanate groups and is sold under the name polyisocyte5 nat K.

The invention is illustrated by the following examples.

Example 1. Floor covering is made of 100 grade concrete on known rubble. After 10 days, the concrete layer is ground and impregnated with an 85% acetone solution of oligoaryl isocyanate with a 29% content;: isocyanate groups.

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Claims (2)

Example 2. Floor coverings are made of 200 grade concrete on marble rubble. After 7 days, the coating is polished and impregnated with 70% lacT0 with a thief in oligzarypichopia ethyl acetate with 23%. content of isocyan groups .-. Example 3. The flooring is made of 300 grade concrete on granite shibna. After 4 days, the coating is impregnated with a 75% solution of oligoaryl eocyanate in a mixture of acetone and toluene. The properties of floor coverings (I - without impregnation, II - impregnation with an isocyanate-containing polymer, III - polyysis with cyanate K) are listed in Table. 100 0.62 0.480.29 4.1 2.8 2.3 200 0.47 0.340.24 3.9 2.5 1.8 300 0.26 0.210.18 3.8 2.5 1.7 Wear and tear determined are on the instrument LCI after 196 revolutions, water absorption on samples 3x3x3 cm for 10 days. Thus, wear is reduced by comparison with the prototype by 20-40%. The use of oligoaryl isocyanate allows replacing the natural deficient product - castor oil, which reduces the cost of the floor. The method can be recommended for finishing work when performing concrete floors with a ground surface, as well as for reinforcing the upper layer of flooring in floors exposed to considerable mechanical stress. Claims The method of arranging concrete floors by laying a layer of concrete mix, compacting it and then impregnating the concrete with an isocyanate-containing compound, characterized in that, in order to improve floor durability, impregnation is carried out with an organic solvent of oligoaryl isocyanate of the general formula (nso), where n 1-4. Sources of information taken into account in the examination 1. USSR Patent No. 293328, cl. From 04 To 21/00, 1967. 2. Authors certificate of the USSR 504744, cl. From 04 To 41/28, 1973 (prototype).