HU197285B - Self-stretching, surface-equalizing and/or floating mortar-mixture and process for production of the mortar - Google Patents

Abstract

The invention relates to a self-flowing, adhesive flooring compound and to a process for its manufacture. The flooring compound according to the invention has the following composition: 36 - 45% by mass of cement, 45 - 58% by mass of sand and/or ground limestone, 2 - 5% by mass of gypsum, silica, bentonite or mixtures thereof, 1 - 3% by mass of casein, 0.05 - 0.18% by mass of NaF, 0 - 1.2% by mass of silicone oil, soda and/or hydrated lime, 0 - 4.0% by mass of zeolite, 0 - 0.5% by mass of methylcellulose and 0 - 20% by mass of fly ash and/or ground blast furnace slag. The dry flooring compound is produced by dry mixing of its components. For application, it is stirred up with 20-30% of water and then applied in a layer thickness of 2-20 mm. Due to its good flow properties, a smooth surface is formed rapidly, which is walkable already after one day and whose mechanical parameters (compressive strength, flexural strength, dimensional stability) in some cases exceed the properties of similar known products.

Description

The present invention relates to a dry mortar mixture and to a process for preparing a self-leveling, leveling and / or leveling mortar.

Dry mortar can be used successfully in the construction industry, primarily as a constituent of building materials, but also plays an important role in finishing buildings, creating smooth, smooth pavements or repairing defective surfaces. Defective substrates, whether on floors or other similar surfaces, are always a problem as they make it difficult or impossible to place the cover on them.

It is known that prefabricated floor panel products have a non-flat surface on the living area, with slightly more or less horizontal surfaces during installation. They are covered with PVC or textile carpets, parquet, etc. I can't glue them directly because they are usually uneven and sloping.

Attempts to overcome these shortcomings have been achieved by surface leveling with cement mortar or a mixture of cement mortar and polyvinyl acetate, but procedures have not become common because, due to the lack of self-leveling of the mortar, manual smoothing did not provide a uniform, dense, flat surface. , did not stick well to the base, collapsed and came up.

To solve this problem, special plaster and cement-based floor leveling and leveling mortars are used, which require the purchase of concentrates containing plastic from abroad, especially from capitalist countries.

SUMMARY OF THE INVENTION The object of the present invention is to eliminate the above disadvantages and imports, and to provide a composition and a manufacturing process for a surface leveling dry mortar that is subject to many conflicting requirements such as long-term storage, self-leveling, low bleeding tendency, high strength, low shrinkage, high adhesive strength, non-cracking, good adhesion, water resistance. It is a further object of the present invention to provide a process for making self-leveling and / or leveling mortar relatively easily from commercially available, readily available non-capitalized base materials.

In our attempts to solve this problem, we realized that mortars consisting of cement, sand and water can be made self-leveling by the addition of casein. Further, the self-leveling property can be enhanced by the addition of casein by addition of carbonyldiamide or carbonyldiamide and amorphous silica with a very high specific surface area.

It has also been discovered that the self-leveling mortar has a strong tendency to bleed and foam, and that this bleeding tendency is a small amount of hemorrhagic agents, such as the semisecular crystalline water of alkaline sulfates, which improves the self-leveling properties of very amorphous silicon. dioxide, rye flour, but preferably they can be reduced or eliminated by simultaneous addition.

It is also a part of the recognition that the power plant fly ash, slag and blast furnace slag, and so on. mixtures of these, as well as alkaline earth metal carbonate, retain water in the solidified mortar, thereby reducing the tendency to crack. In addition, alkaline earth metal carbonate also increases hydraulic ski stability.

According to an object of the present invention, the present invention relates to a dry mortar mixture which

25-40 parts by weight of silicate cement and 1-6 parts by weight of alumina cement, 20-50 parts by weight of hon or quartz meal, 10-20 parts by weight of fly ash and / or of slag and / or traszliszt 5-30 parts by weight of alkaline earth metal carbonate, 0.4-1.5 parts by weight of organic plasticizer, 0.5-4.0 parts by weight of half-molecule crystal-

water-containing alkaline earth metal sulphate powder,

02-1,0 parts by weight of flour and rye flour

It contains 0.01 to 0.05 parts by weight of antifoam components.

Preferably, the dry mortar mixture of the present invention comprises cement components having a clinker content of up to 6% tricalcium aluminate, a particle size of 0.1 to 1.0 mm of quartz sand, quartz grit - alkaline earth metal carbonate grit, and quartz grit alkaline earth metal. It has an average particle size of 0.25 mm. In a preferred composition, the organic compound plasticizer of the dry mortar mixture is e.g. Industrial acid casein containing by weight not more than 10% of the total weight of particles of size greater than 500 micrometers or containing, by weight, 50% of carbonyldiaginide.

The invention further relates to a process for the production of a self-leveling surface leveling and / or leveling mortar which is prepared from a dry mortar mixture by

0.4-1.5 parts by weight of industrial acid caseins, 0.4-1.5 parts by weight of carbonyldiamide, 0.2-1.0 parts by weight of rye flour, 1.0-6.0 parts by weight of bauxite cement as well as required 1.0-5.0 to a homogenized concentrate of a part by weight of silica components,

20-50 parts by weight for sludge free mine, river sand or quartz earth

0.01-0.05 parts by weight of a liquid antifoam agent e.g. genapol is sprayed and the antifoam fraction of the components is homogenized,

25 to 40 parts by weight of silicate cement, a

10 to 20 parts by weight of power plant fly ash

5 to 30 parts by weight of alkaline earth metal carbonate

Ground, a

0.5-4.0 parts by weight of a half-molecule of crystalline water containing alkaline earth metal components are added, followed by

3-10 parts by weight of the concentrate are mixed and the resulting mixture is homogenized in a high-efficiency powder mixer, and the homogenized mixture is mixed with 20-30% by weight of water on a total basis.

The self-leveling, leveling and / or leveling mortar of the present invention has a number of advantageous novel additive effects which have been incorporated into one of the prior art. Thus, the dry mortar, mixed with water, is self-contained under constant, general conditions, without any external influence, at least 220 m in diameter. After 24 guards, it is step resistant at 20 ° C, ie the surface has a hardness of at least 20 Schor D and the surface is crack-free.

The flexural tensile strength of the solidified mortar is at least 2 MPa at 28 days of age. compressive strength of at least 10 MPa. Linear length change at 28 days max. - 0.4X. has an adhesive strength of at least 0.5 MPa and the surface is well adhesive.

The process and dry mortar mixture according to the invention are illustrated by the following examples:

Example 1 A self-leveling surface leveling and / or leveling mortar is prepared by 34 kg of Portland cement S54, 2 kg of bauxite cement, 15 kg of power ash, 10 kg of alkaline earth metal carbonate 0.6 kg of acid casein with maximum particle size up to 10%,

1.2 kg of half-molecule crystalline water of alkaline earth metal sulphate, 0.4 kg of rye flour,

36.8 kg of quartz sand having a particle size of 0.1-0.6 mm and 0.02 kg of genapol liquid antifoam is dry mixed.

The dry mortar mixed with 23% water gives an area of 265 mm.

day hardness 15 Schor D day flexural tensile strength 4.6 MPa 28 day compressive strength 24.2 MPa day linear change -0.122% good adhesion

Example 2

A self-leveling surface leveling and / or leveling mortar is prepared by preparing a dry concentrate for storage by dry mixing 66.6 kg of bauxite cements and 20 kg of acid casein with 13.4 kg of rye flour.

Weigh 47 kg of quartz sand with a particle size of 0.1-0.6 mm, spray with 0.02 kg of genapol antifoam and homogenize, then add 10 kg of power plant fly ash, 10 kg of 00 alkaline earth carbonate, 30 kg of Portland cement S54 and 3 kg. kg of concentrate and mixed with water until homogenized.

The dry mortar with 21X water gives an area of 240 mm.

day hardness 20 Schor D day flexural tensile strength 4.99 MPa 28 day compression strength 19.8 MPa day linear change -0.056% good adhesion

Example 3

A self-leveling smoothing mortar is prepared from a dry mortar mixture by preparing a suitable concentrate for storage by dry mixing 12.8 kg of acid casein, 12.8 kg of carbonyl diamide, 10.2 kg of rye flour and 64.2 kg of bauxite cement. Weigh 35.9 kg of quartz sand with a particle size of 0.1 to 0.6 mm, spray with 0.02 kg of genapol antifoam and homogenize, then add 34 kg of S54 350 Cernate, 15 kg of power fly ash, 10 kg of 00 alkaline earth carbonate. , 1.2 kg

half molecule of crystal water containing alkaline earth metal sulfate, 3.9 kg and concentrate mixed with water to homogenize Juk. The dry mortar with 20X water is 270 mm area ad. 1 day hardness 28-day flexor-puller 50 Schor D strength 8.19 MPa 28-day compressive strength 28-day linear 35.6 MPa changes in length -0.09% Adhesive saga good

Example 4

Preparation of a self-leveling, leveling and / or leveling mortar by preparing a concentrate comprising 8.4 kg of acid casein, 8.4 kg of carbonyldiamide, 6.9 kg of rye flour, 33.9 kg of high specific surface area amorphous silica and 4 kg of bauxite cement are dry mixed.

Weigh 33.9 kg of quartz sand with a particle size of 0.1-0.6 mm, spray with 0.02 kg of genapol antifoam and homogenize, then add 34 kg of S54 350 powder, 15 kg of power fly ash, 10 kg of alkaline earth carbonate 00. 1.2 kg of half-molecule crystalline water of alkaline earth metal sulphate, 5.9 kg of self-leveling concentrate and homogenized.

The dry mortar with 20% water has an area of 280 mm

ad. 1 day hardness 56 Schor 28 sun bending tensile strength 9.1 MPa 28 daytime compressive strength 42.8 MPa 28 daily linear change in length -0.10%

good adhesion

As is evident from the examples, the dry mortar of the present invention contains a number of very small amounts of ingredients which are difficult to homogenize completely during the process. Further, the liquid antifoam component forms lumps with fine powdery materials and is also difficult to homogenize.

Thus, according to the experiments, it is expedient to prepare the mortar from the components of the specified composition and amount in three stages.

In the first stage, concentrates are prepared for storage of industrial acid casein (carbonyl diamide, amorphous silica), rye flour and bauxite cement.

In the second stage, the antifoam agent is sprayed onto the quartz sand and homogenized, followed by the addition of silicate cement, power fly ash, alkaline earth metal carbonate, half-molecule crystalline water alkaline earth sulphate and 3 to 10 parts by weight of the prepared concentrate.

The invention is, of course, not limited to the methods of preparation set forth in the examples, but may be practiced in many ways within the scope of the claims.

Claims (5)

PATENT CLAIMS A dry mortar mixture comprising: 25-40 parts by weight of silicate cement and 1-6 parts by weight of aluminate cement, 20-50 parts by weight of sand or quartz powder, 10-20 parts slag traszliszt, eróműpernye grist and or and or 5-30 parts grist, alkaline earth • carbonate 0.4-1.5 parts organic plasticizer, 0.5-4.0 parts half a molecule crystal water-containing alkaline earth metal sulphate powder, 02-1.0 parts by weight of rye flour and meal flour product 0.31 to 0.05 parts anti-foaming com- contains nens. Dry mortar mixture according to claim 1, characterized in that the clinker content of the cement components is not more than 6% tricalcyl aluminum aluminate, the particle size of the quartz sand, quartz powder - alkaline earth metal carbonate powder component and the quartz earth element is alkaline. The carbonate powder component has an average particle size of 0.25 mm. The mortar mixture according to claim 1 or 2, characterized in that the organic plasticizer is e.g. industrial acid casein is used which has a particle size greater than 500 micrometres at most 10% by weight or contains carbonyl diamide in an amount equal to 50% by weight of the total. 4. A process for producing a self-leveling surface leveling and / or leveling mortar from a dry mortar mixture, characterized in that the dry mortar mixture 0.4 to 1.5 parts by weight of industrial acid caseins, 0.4 to 1.5 parts by weight of carbonyldiamide, 0.2 to 1.0 parts by weight of rye flour, 1.0 to 6.0 parts by weight of bauxite cement, as required From 1.0 to 5.0 parts by weight of silica components, a homogenized storage concentrate is prepared, followed by 20 to 50 parts by weight of a sludge-free mine, stream sand or quartz 0.01-0.05 parts by weight of a liquid antifoam agent e.g. genapol is sprayed and the components are sandblasted, 25-40 parts by weight of silicate cement, 10-20 parts by weight of fly ash, 5-30 parts by weight of alkaline earth metal carbonate, 0.5-4.0 parts by weight of a half-molecule of crystalline water-containing alkaline earth metal sulfate powder components are added, followed by 3-10 parts by weight of the concentrate are mixed and mixed with water (20-30% by weight of the total amount) with matt stirring. and the resulting mixture is homogenized in a high-efficiency powder mixer and the homogenized mixture without flow