SU927786A1 - Ceramic material for making concrete floors - Google Patents

Description

I

The invention relates to methods for flooring industrial buildings.

There is a known method of arranging concrete floors by laying a layer of concrete mix, compacting this layer and then impregnating (4-10 days of concrete hardening) with a solution of polyetherurethane with terminal isocyanate groups. Such an impregnation provides a reduction of 10 to 15 of water absorption and wear in the surface layer of concrete compared with the non-impregnated surface l.

However, the high viscosity of the solution does not allow the structure of the surface layer of concrete to be compacted to a thickness greater than 1 mm.

Therefore, the wear resistance of the entire floor rises slightly.

There is also known a method for arranging concrete floors, according to which after laying and compacting concrete. its layer is impregnated with 60-80% solution in an organic solvent

an isocyanate-containing polymer based on transesterification with castor oil triethanolamine. Impregnation of the surface layer of concrete with this method allows to increase the wear resistance by 20 and lower the water absorption of G21 by 50-60.

The closest to the invention is a method of arranging concrete floors by laying a layer of concrete mix, compaction and subsequent impregnation of concrete with an oligomer. The impregnation is carried out with a 70-80 | -a solution in an organic solvent of oligoaryl polyisocyanate with the general formula 3.

However, this method also requires the use of a toxic and flammable organic solvent and does not sufficiently reduce abrasion of concrete floors.

The aim of the invention is to reduce the abrasion of the sexes.

This goal is achieved by the fact that according to the method of arranging concrete floors by laying a layer of concrete mix, compacting it and post-impregnating the concrete with an oligomer, the concrete is impregnated with a 2-55% aqueous solution of epoxy dimethylhydantoin resin with an aminophenolic hardener. Epoxy dimethylhydantoin resin is a product of dimethylhydantoin condensation with epichlorohydrin and subsequent dehydrochloride with alkali of the general formula CHv-C - NN-SYR-CI-tHn 1 J snp-s-C-Nl sn-o-n Example 1. Floor covering is made of concrete M100 on limestone rubble, after C days, the surface is polished, dried and impregnated with an aqueous solution of epoxy dimethylhydantoic resin with the amino-phenolic hardener AF-2 condensation product of formaldehyde, phenol and ethylenediamine. Example 2. The floor covering is made of M200 concrete on marble rubble, after 7 days the coating is polished, dried and impregnated with an ft8% aqueous solution of epoxy dimethylhydantoic resin with an aminophenol hardener UP-583 - a condensation product of formaldehyde, phenol and diethylenetriamine. Example 3. The flooring is made of vacuum-evacuated concrete MESO on granite rubble, after 7 days the coating is dried and impregnated with an aqueous solution of epoxy dimethylhydantoic resin with an aminophenolic hardener UP-60b / 2 Tris (dimethylaminomethyl) phenol. In tab. 1 shows the composition of the impregnating composition. Table 1

13.2

AF-2 UP-583

The impregnation time is not limited, since it is carried out when constructing concrete floors in construction conditions under normal conditions. The absorption time of the compositions according to examples 1-3 is respectively: 2, 27 and 38 minutes at a flow rate of Q g / m Through C h at 20 ° C, the composition ensures the absence of tackiness on the surface. The curing time at 20 ° C in the pores of the concrete is 3 days. The termination of curing is the time when the microhardness of the epoxy polymer in the surface pores of the concrete reaches a maximum value.

12.5

The depth of impregnation of concrete depends on its density, the viscosity of the composition and the temperature of the concrete. The minimum depth of impregnation corresponds to example 3 and is 2.8 mm; in other examples it is 3.3 and 3.7 mm (examples 2 and 1, respectively

The data of comparative tests of concrete floor coatings without impregnation, impregnated with a 70-85 solution in an organic solvent of polyisocyanate K and impregnated with the proposed composition are presented in table. 2 and indicate a significant increase in wear resistance, reduction of abrasion of floors.

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The method finds widespread use of the abrasion of floors, impregnation of concrete for the installation of concrete floors is carried out in 2-55% of buildings under construction due to an increase in epoxy-dimethyl resin resistance and improvement of the conditions of hydantoin resin with an aminophenol volt .5 hardener. invention formula taken into account in the examination

The method of arrangement of concrete floors No. 293328, cl. S O B 21/00, 19b7. by laying a layer of concrete mix, 2. The USSR certificate of authorship of its compaction and subsequent impregnation, no., cl. C V, 1973 concrete by oligomer, about tl and h a- 3- USSR author's certificate y y and with the fact that, in order to reduce, № 709601, cl. S B 1/28, 1975 Sources of information

1. USSR author's certificate

Claims (1)

Claim A method of arranging concrete floors by laying a layer of concrete mixture, compacting it and then impregnating concrete with an oligomer, characterized in that, in order to reduce the abrasion of floors, concrete is impregnated with a 42-55% aqueous solution of epoxy dimethylhydantoin resin with an aminophenol hardener.