DE2146709A1 - MORTAR MIXTURE AND USE FOR LAYING TILES AND TILES - Google Patents

Description

Süddeutsche Kalkstickstoff-Werke Trostberg, 16c, Sept. 1971

Our sign: Pat, 2003 / Th-IH,

2H6709

Mortar mix and use for laying tiles and tiles

The invention relates to an inorganic mortar mixture Binders, melamine-formaldehyde condensation products containing sulfo acid groups and aggregates as well as the use of the mixture for laying tiles, tiles and the like »in the thin bed method ·

A building material is already known, which consists of an inorganic binder, 0.01-30 wt .- ^, based on the binder, sulfo Acid group-containing resin based on an amino s ~ triazine with at least two NHg groups and possibly fillers. (Austrian patent specification 263 607).

This building material is unsuitable for laying tiles, tiles and the like in terms of workability

German patent specification 1 158 430 describes the use a mortar made from Portland cement, methyl cellulose and sand and / or ground limestone as tile adhesive. Due to the relative With a high content of methyl cellulose, the mortar can be processed very well, but the water resistance is greatly reduced.

The object of the invention was now to create a mortar mixture to develop that do not have the disadvantages shown «

shows.

The mortar mixture is characterized in that it contains 25-85% by weight

3 0 9 0 I 2 / H) 6 I.

ORIGINAL INSPECTED

2H6709

Cement, 0.05-0.15 wt. $ Methyl cellulose having a viscosity of 1,000-3,000 cP, measured in a 2-strength aqueous solution, 1.5-6 wt .- $ melamine formaldehyde containing sulfonic acid groups »» condensation products with a viscosity of 40-500 cP, measured in 20% aqueous solution, 0.02-0.1% by weight water-soluble, nonionic polyacrylamide, based in each case on the total weight of the dry mixture, the remainder being sand and / or ground Contains limestone.

Melamine-formaldehyde condensation products containing sulfonic acid groups of the type mentioned are commercially available.

An additional content of 0.5 to 5 wt .- ^, based on the * Total weight of the dry mix, conveyed by asbestos fibers the elasticity of the dry mortar, i.e. possible damage due to tensile and shear forces, is reduced.

Depending on the grain structure of the constituents of the mixture, the amount required to make the ready-to-use mortar line is required Water quantity different. However, the water content of the finished mortar should not exceed 35% by weight,)

The addition of small amounts of polyacrylamides prevents it from settling lifting the mortar from the substrate when working on the mortar bed with the notched trowel.

The mortar mixture according to the invention is suitable because of your good workability and the high water resistance after setting very good for laying tiles, tiles and the like. in the thin bed process.

The following examples are intended to explain the invention:

About the adhesion or water resistance of the mortar mixture according to the invention show, tiles were laid with the mortar mixes listed in the examples using the thin-bed method

3098 12/1061

2U6709

After 28 days of dry storage "resp. after 1 day of drying and. For 27 days of wet storage, the adhesive strength was determined by shearing off the tile (see table).

Ji «i play 1

309 parts by weight of Portland cement 275, 21 parts by weight of additive I, "Consists of 19 parts by weight of a liquid containing acid groups Lielamiii-'formaldehyde-Pv decomposition product of a viscosity of approx. 100 cP, measured in a 20% aqueous solution, 1.5 wt. Parts of methyl cellulose with a viscosity of 2 <> 000 cP, measured in 2 ~ 5a, aqueous solution, and 0.5 parts by weight of a "water" The laudable, nonionic polyacrylamide was mixed intensively with 670 parts by weight of quartz sand (0-0.4 mm) From 100 parts by weight of dry mix and 263 parts by weight of water the mortar was set.

Example 2

416 parts by weight of Portland cement 275, 21 parts by weight of additive I. (see Example 1), 25 parts by weight of asbestos fibers were 538 Parts by weight of quartz sand (grain size up to 0.2 mm) mixed intensively. 1,000 parts by weight of this mixture were mixed with 287 parts by weight of water to form a mortar.

Example 3 (comparative example)

416 parts by weight Portland cement 275.5 (10, 20) parts by weight methyl cellulose with a viscosity of 2000 cP, measured in 2-? o ~ iger solution, and 25 parts by weight of asbestos fibers were with 538 wt. Share quartz sand (grain size up to 0.2 mm) intensively mixed

Those achievable with the mortar mixtures according to Example 1–3 Haftfestigl; e.i.t; jv; erte of the tiles laid using the thin-bottom method are given in the following table »

3 0 9 8 12/1061

2146VU3

mortar
after
example Additive-'
middle Additive"
lot
Weight "
Parts Turn on
water
Weight «parts /
-I ₀ OOO wt.
Parts
Dry-
raisch Adhesion strength according to 1 day dry
u. 2? Day wet »
storage
ρ
kp / cm 1
2
3
3
3 Addendum I.
t. £
Methyl-
cellulose
Il
Il 21
21.
5
10
20th 263
287
343
356
363 28 Tgo
Dry
storage
ο
kp / cm 6th
7th
4th
fallen off
» 10
11
5
6th
7th

3098 12/1061

Claims (1)

2U6709 Claims Λ.) Mortar mix, consisting of inorganic binder, melamine-formaldehyde condensation products containing sulfo acid groups and aggregates, characterized in that they contain 25-05 wt .- # cement, 0.05-0.15 wt .- # methyl cellulose with a viscosity of 1,000 - 3,000 cP, Measured in a 2% aqueous solution, melamine-formaldehyde condensation products containing 1.5-6% by weight of sulfonic acid groups and a viscosity of 40-500 cP, measured in a 20% aqueous solution, 0.02-0.1% by weight contains water-soluble, nonionic polyacrylamide, based in each case on the total weight of the dry mixture, the remainder being sand and / or ground limestone. 2 ·) Mortar mixture according to claim 1, characterized by a content of 0.5-5 wt .- ^, based on the total weight the dry mix, asbestos fibers. 3 ·) Use of a mortar mixture according to claims 1 and 2 for laying tiles using the thin-bed method. 309812/1061