DE2146709B2 - - Google Patents

Description

(Grain size up to 0.2 mm) intensively mixed. 1000 parts by weight this mixture was mixed with 287 parts by weight of water to form a mortar.

Example 3 (comparative example) parts by weight Portland cement 275, 5 (10, 20) Parts by weight of methyl cellulose with a viscosity of 200OcP, measured in 2% solution, and 25 parts by weight of asbestos fibers were mixed with 538 parts by weight of quartz sand (grain size up to 0.2 mm) intensely mixed.

The adhesive strength values that can be achieved with the mortar mixtures according to Examples 1 to 3 in the thin-bed process laid tiles are given in the table below.

Mortar after

example

Additives

Additional amount (parts by weight) of mixing water

Parts by weight /
Parts by weight
Dry mix

Adhesion strength according to

28 days

Dry storage
kp / cm *

1 day dry and

27 days wet storage

kp / cm ^l

1 2 3 3 3

Addendum I.

Addendum I.

Methyldlulose

Methyl cellulose

Methyl cellulose

21

21

10 20 263
287
343
356
363

11
5
6th
7th

fallen away

Claims (2)

1 2 The object underlying the invention consisted in using a mortar mixture that does not have the disadvantages indicated. 1. Use of a mortar mixture for The mortar mixture used consists of 25 to laying tiles and tiles in the thin-bed 5 85 percent by weight cement, 0.05 to 0.15 weight method, consisting of 25 to 85 percent by weight methyl cellulose with a viscosity of 1000 to cement, 0.05 to 0.15 weight percent methyl 3000 cP, measured in a 2 ° / _o aqueous solution waßngen, cellulose having a viscosity of 1000 to 300OcP, 1.5 to 6 weight percent Sulfosauregruppen entgemessen in a 2% aqueous solution, holding melamine formaldehyde condensation production -1.5 to 6 percent by weight sulfonic acid groups io th a viscosity of 40 to 50OcP, measured in melamine-formaldehyde condensate-containing 20% aqueous solution, 0.02 to 0.1 weight units with a viscosity of 40 to 500 cP, percent water-soluble , nonionic polyacrylics, measured in 20% strength aqueous solution, 0.02 to amide, in each case based on the total weight of the 0.1% by weight water-soluble nonion ical dry mixture, as well as a remainder of sand polyacrylamide, in each case based on the total and / or ground limestone. weight of the dry mixture, remainder sand melamine formalde- and / or ground limestone. are hyd condensation products of the type mentioned 2. Using a mortar mix after commercially available. Claim 1, characterized by a content An additional content of 0.5 to 5 weight 0.5 to 5 percent by weight, based on the ao percent, based on the total weight of the dry Total weight of the dry mixture, asbestos mixture, of asbestos fibers promotes the elasticity of the fibers. dry mortar, d. H. possible damage from occurring tensile and shear forces are reduced. Depending on the grain structure of the components of the he mixture is the one for making the ready-to-use The invention relates to the use of a mortar mixture, different amounts of water required. Mortar mixture of inorganic binding agent, SuI- The water content of the finished mortar, however, containing melamine-formaldehyde groups should not exceed 35 percent by weight,
The addition of small amounts of polyacrylamide to laying tiles, tiles and the like in a thin bed prevents the mortar from lifting off the substrate. when processing the mortar bed with the comb There is already a known building material, which trowel. of inorganic binder, 0.01 to 30 parts. The mortar mixture used according to the invention percent by weight, based on the binder, sulfoic acid due to its good processability group-containing resin based on an amino 35 and the high water resistance after setting s-triazins with at least two NH ₂ groups and very good for laying tiles, tiles and the like. possibly fillers (Austrian in the thin bed process. Patent 263,607). The following examples are intended to This building material is used to lay tiles, purify. Tiles and the like with regard to the workability 40 To ensure the adhesion or water resistance of the invention not suitable. according to the mortar mix used The German patent specification 1158 430 describes the use of a mortar made of Portland cement, with the mortar mix used in the examples, to be laid using the thin-bed method. Methyl cellulose as well as sand and / or ground After 28 days, dry limestone is used as tile adhesive on the test installations. Due to the relatively high 45 storage or 1 day dry and 27 days wet content of methyl cellulose, the processability of the storage, the adhesive strength by shearing off the mortar parts is very good, the water resistance has been strongly determined in each tile (see table),
reduced. The German Offenlegungsschrift 1 941 576 contains example 1
the instruction to use a mortar with a content of 50 a resin modified with sulphite or sulphonic acid 309 parts by weight Portland cement 275, 21 parts by weight based on an amino-s-triazine with at least part of additive I, consisting of 19 parts by weight of a _{melamine formaldehyde containing two NH 2} groups in terms of its processability, by adding a naphthalenesulphonic acid formaldehyde - hyd condensation product with a viscosity of about hyd condensation product alone or in combination 55 100 cP, measured in 20% aqueous solution, 1.5 generation to improve with cellulose ethers. The weight share it methylcellulose having a viscosity of substantial addition of naphthalene sulfonic acid-form 2,000 cP, measured at 2 ° / ₀ strength aqueous solution, and aldehyde condensation products provides an additional 0.5 parts by weight of a water soluble, nichtionilichen cost of materials is, but without a Ausnic polyacrylamides were given along with 670 statements about the achievable adhesive strength. 60 parts by weight of quartz sand (0 to 0.4 mm) intensively Finally, the German interpretation contains mixes. From 1000 parts by weight of dry mix 1,283,726 recommended that polyacrylamide alone or and 263 parts by weight of water became the mortar mortars prepared together with cellulose ethers for smoothing. of wall and floor surfaces. As at B e i s d i e 1 2 these mortars back no special requirements 65 ^p visibly their adhesive strength, 416 parts by weight of Portland cement 275, 21 parts by weight are not suitable in this form for laying tile parts additive I (see Example 1), 25 parts by weight of asbestos and tiles. fibers were made with 538 parts by weight of quartz sand