CS228262B1 - Fixation method of ceramic, concrete, xylolite and basalt tiles - Google Patents

Abstract

The invention relates to the field of building production and solves the problem of fixing ceramic, concrete, xylolite and basalt tiles to traditional cement mortars, while high adhesion of the tiles with the bonding mortar is achieved by creating an adhesive thin layer of polymer cement, prepared from cement, an aqueous dispersion of synthetic nutrients and water. The layer of polymer cement milk is spread, for example, with a bricklayer's trowel onto the moistened cement mortar before laying the tiles. The adhesion of the tiles to the substrate is 3 to 4 times higher than when using conventional cement bonding mortars and is at the level of expensive and scarce polymer cement bonding mortars. In addition to its bonding and resistance, it has sufficient ductility to compensate for shear forces arising from different expansion joints of the substrate and the paving. This effect is reflected in the improvement of the quality of the paving and the reduction of unnecessary repairs of loose paving.

Description

2 - 228 282

The invention solves a method of fixation of ceramic, concrete, xylolite and basalt tiles to cement mortars and a micro-layer of polymer cement. The floor of CSN 73 3451 tiles is laid into an adequately thick layer of mortar or other binder. The thickness of the layer depends on the second floor tiles used, the grit of the mortar filler and the unevenness of the substrate. When using polymer cement mortars or sealants, thicknesses of approximately 0.5 cm are designed by technological regulations. This is almost feasible in construction practice, since the base concretes according to the standard requirement are to be rough, covered with a wooden batten with a permissibility of the base + 5 mm. At the same time, the sealant layer must create a tile floor in which the unevenness of the base is compensated, as well as the frequent thickness tolerances of the tiles ·

Cement mortars generally do not have high adhesion to tiles. Moisturized bonding mortars are commonly used, as the tile moves after plastering and leveling during placement. In addition, the heavy-duty pavement would be immersed in the plastic mortar. This adds to this unfavorable low adhesion factor. Tiles, which repair is laborious and complicated, since defects most often occur after traffic has been overloaded. 228 262

Better results are obtained when using a polymer cement bonding mortar prepared on an outpatient basis by adding aqueous dispersions of synthetic resins to cement mortars, but using commercial cement bonding cements.

Aqueous dispersions of synthetic resins are narrow-profile and relatively expensive raw materials, but can be used, either in the form of the addition of docement mortars or in admixture of sticky sealants, increasing the cost of fasteners enormously.

These drawbacks are eliminated by the method of fixing the tiles with the adhesive microlayer of the polymerization according to the invention, which is the essence of the new technology of creating a mortar bed of the bonding layer between the substrate and the tiles. Adequately applied cement mortar layer according to ČSN 73 3451 is applied to the substrate by a traditional method in a humid state and leveled with a wooden batten. polymethylmethacrylate, vinyl acetate butyl acrylate, vinyl acetate styrene acrylate and the like, water in a volume of 0.5 to 2 parts. Before laying the tiles, the polymeric milk is spread with a metal trowel in a thin continuous layer and the working width of the tile ·

At an average consumption of polymer cement of approximately 900 cnr per m, the bond strength of the bonding mortar measured after 28 days is 3 to 4 times higher than when placed in cement mortar and is at the level of adhesion achieved using polymer cement bonding mortars, respectively. .cements which, depending on the thickness, are several times more expensive ·

A further advantage of the invention is to minimize the risk of technological leakage, because in construction practice, a bonding mortar is prepared without an exact method of measuring plasticity and is only tasted, more inclined to the mixture more dense, since the tile generally works on it.

In addition, the bonding intermediate layer has sufficient ductility and makes it possible to compensate for shear forces resulting from different dilatations of the substrate and tiles. 4-228 282

The invention can also be used advantageously for bonding mortar thicknesses below 2 cm, similar to polymer-cement mixtures. The condition is a finer grain of a traditional cement mortar depending on the layer thickness with the necessary penetration of the base concrete, diluted aqueous dispersion of eg polyvinyl acetate and its copolymers in a ratio of 1: 4 - 5. After the deposition of the paint in 15 - 20 minutes . Example 1

Composition of cementitious mortar:

River sand with a change of up to 1,5 mm 1,500 cm

Slag-portland cement tr, 325 600 cm3

Water

The wet mix after spreading onto the concrete substrate at a thickness of 3.5 cm is leveled with a batten and spread on the surface with a trowel and an adhesive microlayer of the polymeric composition of the following composition:

Struskoportland cement tr. 325Water dispersion of polyvinyl acetateWater 400 cm3100 cm3150 cm3

After 28 days, the ceramic tiles laid in the mortar bed reached the cohesiveness with the base 1.2 MPa after 28 days. The adhesion of the same paving without adhesive micro-polymer-cement after 28 days reached 0.26 MPa.

Claims (1)

OBJECT OF THE INVENTION 228 282 Method of fixation of ceramic, concrete, xylolite and basalt tiles to traditional cement mortars, characterized in that 600 to 900 ml of polymer-based milk containing 3 to 8 parts by volume of cement, 0.5 to 2 parts by volume of an aqueous dispersion of a synthetic polyvinyl acetate homopolymer, or derivatives thereof, or derivatives of polyacrylic acid, and 0.5 to 5 parts by volume of water, and on the surface thus treated, the tiles are deposited ·