WO2011113694A1

WO2011113694A1 - Self-compressing concrete, method for the production thereof, and use of the self-compressing concrete for producing a concrete layer

Info

Publication number: WO2011113694A1
Application number: PCT/EP2011/053084
Authority: WO
Inventors: Kay André BODE; Alexander Flohr; Andrea Dimmig-Osburg
Original assignee: Bauhaus-Universität Weimar
Priority date: 2010-03-17
Filing date: 2011-03-02
Publication date: 2011-09-22

Abstract

The invention relates to a self-compressing concrete. According to the invention, the self-compressing concrete comprises blast furnace cement or Portland composite cement and ground limestone, aggregate, a styrene-acrylate copolymer, a high-performance flow agent, and water in a prescribed composition. The invention further relates to a method for the production thereof and to a use of the self-compressing concrete for producing a concrete layer (4).

Description

Self-compacting concrete, process for its production and use of the self-compacting concrete to produce a concrete layer

The invention relates to a self-compacting concrete according to the features of the preamble of claim 1 or 3, a method for producing a self-compacting concrete according to the features of the preamble of claim 5 or 7 and a use of a self-compacting concrete according to the features of the preamble of claim. 9

From the state of the art it is known to apply a mortar-based layer in plaster on surfaces to be repaired or repaired or to repair such surfaces with a shotcrete layer.

A disadvantage of the previous solutions is that in the renovation / repair of listed concrete surfaces / facades often required original structures can not be produced. The surface does not correspond to a switched concrete surface. In addition, restricted accessibility often prevents professional renovation.

From DE 10 2007 063 455 AI a concrete and a railway sleepers made of concrete are known. The easily compressible or self-compacting concrete has proportions of cement and water, wherein the cement content is more than 400 kg / m ³ and in the processing state, the ratio of the mass of water content to

Cement content is less than 0.4.

From DE 10 2008 037 171 AI also a concrete and a concrete railway sleeper are known, the easily compactable or self-compacting concrete shares of cement and water and wherein the cement content is more than 400 kg / m ³ and in the processing state, the ratio of Masses of water content to cement content is less than 0.4. In addition to a share of a fine Aggregates with grain sizes of up to 4 mm, the concrete also has a proportion of coarse aggregate with grain sizes between 8 mm and 16 mm, which consists at least partially of concrete recyclate. In addition, the concrete contains a plasticizer.

The invention is based on the object to provide an improved self-compacting concrete, which is particularly suitable for creating thin concrete layers, and further to provide a method for producing such a self-compacting concrete and a use of self-compacting concrete.

The object is achieved by a self-compacting concrete with the features of claim 1 or 3, a method for producing a self-compacting concrete with the features of claim 5 or 7 and a use of self-compacting concrete with the features of

Claim 9.

Advantageous embodiments of the invention are the subject of the subclaims.

A self-compacting concrete has in a first inventive

Embodiment, a proportion of at least 300 kg of blast furnace cement per m ^{3 of} concrete, wherein the blast furnace cement has a proportion of 20 percent by mass to 64 percent by weight Portland cement clinker and a share of 36 percent by mass to 80 percent by mass blastfurnace slag. Such blast furnace cement is known from the European standard EN 197 under the short name CEM III. The blast furnace cement has a compressive strength of at least 32.5 N / mm ² and a maximum of 62.5 N / mm ² after 28 days. This applies to blast furnace cements CEM III with the standardized cement strength class 32.5 and 42.5.

Furthermore, the self-compacting concrete in the first embodiment according to the invention has a content of at least 300 kg of limestone powder per m ^{3 of} concrete. Furthermore, the self-compacting concrete in the first embodiment of the invention has a share of at least 1400 kg of aggregate of sand, gravel or grit per m ^{3 of} concrete, wherein the aggregate has a maximum grain size of 8 mm maximum. A maximum grain size of 8 mm means that a maximum diameter of the stones or grains of the aggregate is 8 mm maximum. The aggregate is preferably porphyry gravel, which has a low elastic modulus.

The self-compacting concrete also contains in the first embodiment of the invention, a styrene-acrylate copolymer in a proportion of 5 percent by mass to 15 percent by mass, preferably 5 percent by mass of the blast furnace cement. Such a copolymer is formed, for example, as a dispersion and has, for example, a solids content of about 50 percent by mass. The self-compacting concrete is polymer modified by the styrene-acrylate copolymer.

Furthermore, the self-compacting concrete in the first embodiment according to the invention has a high-performance flow agent based on polycarboxylate ether with a proportion of not more than 2% by mass of the blastfurnace cement, preferably about 4 kg per m ^{3 of} concrete. If necessary, an exact dosage should be adapted in each case by tests in order to ensure optimum flowability of the self-compacting concrete.

In addition, in the first embodiment of the invention, the self-compacting concrete has water in a water / cement ratio of not more than 0.55.

A self-compacting concrete in a second embodiment of the invention has a proportion of at least 300 kg Portlandkompositzement per m ³ concrete, the Portlandkompositzement has as main constituents a share of 65 mass percent to 94 percent by weight Portland cement clinker and a share of 6 percent by mass to 35 percent by mass of at least one Umahlstoffes. The Zumahlstoff or the majority of Zumahlstoffen can / can for example, granulated slag, pozzolan, fly ash and / or limestone. Such a Portland composite cement is known from the European standard EN 197 under the short name CEM II. The Portland composite cement has a compressive strength of at least 32.5 N / mm ² and maximum after 28 days

62.5 N / mm ² . This applies to Portland composite cements CEM II with the standardized cement strength class 32.5 and 42.5.

Furthermore, the self-compacting concrete in the second embodiment according to the invention has a content of at least 300 kg of limestone powder per m ^{3 of} concrete.

Furthermore, the self-compacting concrete in the second embodiment of the invention, a proportion of at least 1400 kg of aggregate of sand, gravel or grit per m ^{3 of} concrete, wherein the aggregate has a maximum grain size of 8 mm maximum. A maximum grain size of 8 mm means that a maximum diameter of the stones or grains of the aggregate is 8 mm maximum. The aggregate is preferably porphyry gravel, which has a low elastic modulus.

The self-compacting concrete also contains in the second invention

Embodiment of a styrene-acrylate copolymer in a proportion of

5% by mass to 15% by mass, preferably 5% by mass, of the Portland composite cement. Such a copolymer is formed, for example, as a dispersion and has, for example, a solids content of about 50 percent by mass. The self-compacting concrete is polymer modified by the styrene-acrylate copolymer.

Furthermore, the self-compacting concrete in the second embodiment of the present invention has a high-performance flow agent based on

Polycarboxylatether with a proportion of a maximum of 2 percent by mass of

Portland Kompositzements on, preferably about 4 kg per m ^{3 of} concrete. An exact one Dosage may need to be adjusted in each case by tests in order to ensure optimum flowability of the self-compacting concrete.

The self-compacting concrete also has water in a water / cement ratio of 0.55 maximum in the second embodiment of the invention.

The values of the above formulation of the first and second embodiments of the self-compacting concrete according to the invention relate to the concrete during mixing or immediately after mixing and before applying the self-compacting concrete to a surface to be coated. After application to the surface to be coated hardens and dries the concrete, so that in particular changes the water-cement ratio.

This polymer-modified self-compacting concrete is particularly suitable for creating thin concrete layers in the context of renovation and repair tasks, especially on vertical surfaces. By means of this polymer-modified self-compacting concrete, shuttering structures similar to an original surface can also be designed visibly on redeveloped surfaces. A

Concrete layer of this polymer-modified self-compacting concrete is also usable as a concrete repair layer with a final surface.

By means of the polymer-modified self-compacting concrete is an actual load-bearing concrete structure on which it is applied, protectable and it is a faithful geschalte concrete surface produced. Furthermore, self-supporting, durable concrete components can be produced by means of the polymer-modified self-compacting concrete.

The polymer-modified self-compacting concrete applied to a surface to be repaired leveled due to its rheological properties

Properties automatically off and vented, so no extra

Is to bring in compression energy. By the polymer modification, a better stability of the formulation of the self-compacting concrete is achieved and adhesion of the self-compacting concrete to the surface to be repaired is significantly improved compared to materials according to the prior art.

The polymer-modified self-compacting concrete has due to its

In addition, the composition has a high fatigue strength, as a result of which a future refurbishment effort of a surface renovated with the polymer-modified self-compacting concrete is markedly reduced and a much longer period of time until a renewed necessary refurbishment can be achieved.

In a further development of the first embodiment according to the invention, the self-compacting concrete expediently comprises a proportion of at least 340 kg blast-furnace cement per m ^{3 of} concrete, the blast-furnace cement having a proportion of 20 mass% to 34 mass% Portland cement clinker and a proportion of 66 mass% to 80 mass% blastfurnace slag of at least 300 kg of limestone powder per m ^{3 of} concrete, a minimum of 1400 kg of aggregate of sand, gravel or grit per m ^{3 of} concrete, the aggregate having a maximum grain size of not more than 8 mm, a styrene-acrylate copolymer containing 5% Percent by mass to 15% by mass of

Blast-furnace cements, a high-performance flow agent based on polycarboxylate ethers with a maximum proportion of 2% by mass of blast-furnace cement and water in a water / cement ratio of not more than 0.5.

Preferably, the polymer-modified self-compacting concrete

Color pigments on. In this way, a respective desired color of the polymer-modified self-compacting concrete can be produced. Due to a very bright concrete base color due to the in the first invention

Embodiment of self-compacting concrete used blast furnace CEM III, the polymer-modified self-compacting concrete has a very good colorability with color pigments, so that the polymer-modified self-compacting concrete is very well color-matched to specific requirements. Even when using the Portland composite CEM II in the second embodiment of the self-compacting concrete according to the invention, depending on the other main constituents used in addition to the Portland cement clinker, ie the one or more additives, a good

Dyed given.

In a method for producing a self-compacting concrete in a first embodiment according to the invention a proportion of at least 300 kg of blast furnace cement per m ^{3 of} concrete, wherein the blast furnace cement has a proportion of 20 percent by mass to 64 percent by weight Portland cement clinker and a share of 36 percent by mass of blastfurnace slag, a proportion of at least 300 kg of limestone powder per m ^{3 of} concrete, a proportion of at least 1400 kg of aggregate of sand, gravel or grit per m ^{3 of} concrete, the aggregate having a maximum grain size of not more than 8 mm, a styrene-acrylate copolymer with one portion from 5% by mass to 15% by mass, preferably 5% by mass, of the blastfurnace cement, a high-performance flow agent based on polycarboxylate ether with a proportion of not more than 2% by mass of

Blast furnace cement, preferably about 4 kg per m ^{3 of} concrete, and water in one

Water / cement ratio of maximum 0.55 mixed.

The blastfurnace cement is known from the European standard EN 197 under the short name CEM III. The blast furnace cement has a compressive strength of at least 32.5 N / mm ² and a maximum of 62.5 N / mm ² after 28 days. This applies to blast furnace cements CEM III with the standardized cement strength class 32.5 and 42.5.

In a method for producing a self-compacting concrete, in a second embodiment of the invention, a proportion of at least 300 kg Portlandkompositzement per m ³ concrete, wherein the Portlandkompositzement as main constituents a share of 65 percent by mass to 94 percent by weight Portland cement clinker and a share of 6 percent by mass to 35 percent by mass at least one Umahlstoffes, a share of at least 300 kg of limestone powder per m ^{3 of} concrete, a share of at least 1400 kg of aggregate of sand, gravel or grit per m ^{3 of} concrete, wherein the aggregate has a maximum grain size of 8 mm, a styrene acrylate Copolymer with a proportion of 5% by mass to 15% by mass, preferably 5% by mass, of the Portland composite cement, a high performance flow agent based on polycarboxylate ether with a proportion of not more than 2% by mass of Portlandkompositzements, preferably about 4 kg per m ^{3 of} concrete, and water in a water / cement ratio of not more than 0.55 mixed.

The Portland composite cement is known from European standard EN 197 under the abbreviation CEM II. The Portland composite cement has a compressive strength of at least 32.5 N / mm ² and maximum after 28 days

For example, blastfurnace slag, pozzolan, fly ash and / or limestone can be used as the grinding material, it being possible to use a grinding substance or a plurality of different grinding agents.

In both embodiments of the method according to the invention, the aggregate used is preferably porphyry gravel, which has a low modulus of elasticity. A maximum grain size of 8 mm means that a maximum diameter of the stones or grains of the aggregate is 8 mm maximum.

In both embodiments of the method according to the invention, for example, a styrene-acrylate copolymer formed as a dispersion, for example with a solids content of about 50% by mass, is used. The self-compacting concrete is polymer modified by the styrene-acrylate copolymer. In both embodiments of the method according to the invention, an exact metering of the high-performance flow agent may optionally be adapted in each case by tests in order to ensure optimum flowability of the self-compacting concrete.

This polymer-modified self-compacting concrete, which is preferably mixed in a compulsory mixer in both embodiments of the method according to the invention, is particularly suitable for creating thin concrete layers in the context of renovation and repair tasks, in particular on vertical surfaces. By means of this polymer-modified self-compacting concrete formwork structures similar to an original surface can also be made visible on redeveloped surfaces. A concrete layer of this polymer-modified self-compacting concrete may also be used as a concrete repair layer with a final surface.

By means of the mixed polymer-modified self-compacting concrete, an actual load-bearing concrete structure, to which it is applied after mixing, can be protected and a faithfully cast concrete surface can be produced. Furthermore, by means of the

polymer-modified self-compacting concrete also self-supporting, durable concrete components are produced.

Properties automatically off and vented, so no extra

Is to bring in compression energy.

By the polymer modification, a better stability of the formulation of the self-compacting concrete is achieved and adhesion of the self-compacting concrete to the surface to be repaired is significantly improved over prior art materials. The polymer-modified self-compacting concrete has due to its

In a further development of the first embodiment of the method according to the invention for producing the self-compacting concrete, a proportion of at least 340 kg of blast-furnace cement per m ^{3 of} concrete, the blast furnace cement having a proportion of 20 percent by mass to 34 percent by weight Portland cement clinker and a share of 66 percent by mass of blastfurnace slag , a proportion of at least 300 kg limestone dust per m ³ of concrete, a portion of at least 1,400 kg of rock grains of sand, gravel or crushed material per m ³ of concrete, the aggregate having a maximum particle size of at most 8 mm, a styrene-acrylate copolymer having a Share of 5 percent by mass

15 mass percent of the mass of the blastfurnace cement, a high-performance flow agent based on polycarboxylate with a proportion of not more than 2 percent by mass of the mass of blast furnace cement and water mixed in a water / cement ratio of not more than 0.5.

Preferably, color pigments are added and mixed. In this way, a respective desired color of the polymer-modified self-compacting concrete can be produced. Due to a very light concrete base color due to the blast furnace cement CEM III used in the first embodiment of the invention, the polymer-modified self-compacting concrete has a very good colorability with color pigments, so that the polymer-modified self-compacting concrete can be very well color matched to respective requirements. Even when using the Portland composite CEM II in the second embodiment of the method according to the invention, the self-compacting concrete depending on the next Portland cement clinker used other major constituents, ie the one or more Zumahlstoffen be well dyed.

The self-compacting concrete, preferably produced by means of the method, is preferably used for producing a concrete layer, wherein the self-compacting concrete is applied to a surface of a component to be coated.

As a result, the already described to the two embodiments of the self-compacting concrete according to the invention advantages can be achieved.

Conveniently, a formwork is arranged at a predetermined distance from the surface to be coated of the component and the polymer-modified self-compacting concrete is applied by filling in a cavity between the formwork and the surface to be coated of the component on the surface to be coated of the component. The formwork is preferably arranged at a predetermined distance of at least 2.5 cm to the surface of the component to be coated and has a smooth surface or, in a particularly advantageous embodiment, a structured surface.

A formwork material depends on a respective desired surface structure of the concrete surface of the polymer-modified self-compacting concrete and is for example plastic, metal or more preferably wood, as in this way also a grain of the wood on the concrete surface of the polymer-modified self-compacting concrete, d. H. can be made visible on the renovated surface as a relief in the polymer-modified self-compacting concrete. As a result, by means of the polymer-modified self-compacting concrete formwork structures similar to an original surface can also be made visible on redeveloped surfaces.

If the polymer-modified self-compacting concrete is filled between the formwork and the surface to be coated, it leveled due to its rheological properties automatically and vented so that no additional compression energy is involved. The distance between the formwork and the surface to be coated may be constant over a longitudinal extent and / or over a transverse extent of the surface to be coated, or different distances may occur. However, a minimum distance of 2.5 cm must be maintained everywhere.

The polymer-modified self-compacting concrete is particularly advantageously used on a surface to be coated of the component, which is oriented substantially vertically. However, it can also be used on differently oriented surfaces, for example on horizontally oriented surfaces.

Embodiments of the invention are described below with reference to

Drawings explained in more detail.

Show:

Figure 1 is a schematic sectional view of a to be coated

Surface of a component, a formwork and a concrete layer of a polymer-modified self-compacting concrete, and

FIG. 2 shows a schematic representation of a concrete surface of a surface coated with a polymer-modified self-compacting concrete.

Corresponding parts are provided in all figures with the same reference numerals.

Figure 1 shows a schematic sectional view of a to be coated

Surface 1 of a component 2, a formwork 3 and a concrete layer 4 of a polymer-modified self-compacting concrete. The component 2 is for example a vertical house wall to be rehabilitated, on which the thin concrete layer 4 is to be applied.

To produce the polymer-modified self-compacting concrete, a proportion of at least 300 kg blast-furnace cement per m ^{3 of} concrete, the

Blast furnace cement a share of 20 percent by mass to 64 percent by mass

Portland cement clinker and a proportion of 36% by mass to 80% by mass of blastfurnace slag, a proportion of at least 300 kg of limestone powder per m ^{3 of} concrete, a minimum of 1400 kg aggregate of sand, gravel or grit per m ^{3 of} concrete, wherein the aggregate is a maximum particle size of max 8 mm, a styrene-acrylate copolymer in a proportion of 5% by mass to 15% by mass, preferably 5% by mass, of the blastfurnace cement

High-performance flow agent based on polycarboxylate with a proportion of not more than 2 percent by mass of blast furnace cement, preferably about 4 kg per m ^{3 of} concrete, and water mixed in a water / cement ratio of not more than 0.55.

The blast furnace cement is from the European standard EN 197 under the

Short name CEM III known. The blast furnace cement has a compressive strength of at least 32.5 N / mm ² and a maximum of 62.5 N / mm ² after 28 days. This applies to blast furnace cements CEM III with the standardized cement strength class 32.5 and 42.5.

Alternatively, for the preparation of the polymer-modified self-compacting

Concrete account for at least 300 kg of Portland composite cement per ^{m3 of} concrete, with the Portland composite cement as the main constituent accounting for

65% by weight to 94% by weight Portland cement clinker and a share of

6 percent by mass to 35 percent by mass of at least one Umahlstoffes, a

Share of at least 300 kg of limestone powder per m ^{3 of} concrete, a minimum of 1400 kg of aggregate of sand, gravel or grit per m ^{3 of} concrete, the aggregate having a maximum particle size not exceeding 8 mm

Styrene-acrylate copolymer in a proportion of 5% by mass

15% by mass, preferably 5% by mass, of the Portland composite cement High performance flow agent based on polycarboxylate with a proportion of not more than 2 percent by mass of Portlandkompositzements, preferably about 4 kg per m ^{3 of} concrete, and mixed water in a water / cement ratio of not more than 0.55.

The admixture or the plurality of additives may be, for example, granulated blastfurnace, pozzolan, fly ash and / or limestone.

In both cases, the mixing is particularly preferably carried out in a compulsory mixer or in exceptional cases, for example, in a free-fall mixer.

In a development of the first, the blast furnace comprehensive formulation can also share at least 340 kg blast furnace cement per m ³ concrete, the blast furnace cement has a share of 20 percent to 34 percent by weight Portland cement clinker and a share of 66 percent to 80 percent by mass blastfurnace slag, a share of at least 300 kg of limestone powder per m ^{3 of} concrete, a minimum of 1400 kg of aggregate of sand, gravel or grit per m ^{3 of} concrete, the aggregate having a maximum grain size of not more than 8 mm, a styrene-acrylate copolymer containing 5% Mass percent to 15 percent by mass of the mass of blast furnace cement, a high-performance flow agent based on polycarboxylate with a proportion of not more than 2 percent by mass of the mass of blast furnace cement and water in a water / cement ratio of 0.5 or less.

The aggregate is preferably porphyry gravel, which has a low

Has elastic modulus. A largest grain of 8 mm means that a maximum The diameter of the stones or grains of aggregate is 8 mm maximum.

The styrene-acrylate copolymer is formed, for example, as a dispersion and has, for example, a solids content of about 50% by mass. This styrenic acrylate copolymer is the self-compacting concrete

polymer-modified.

If necessary, an exact dosage should be adapted in each case by tests in order to ensure optimum flowability of the self-compacting concrete.

By the polymer modification, a better stability of the formulation of the self-compacting concrete is achieved and adhesion of the self-compacting concrete to the surface 1 to be coated is significantly improved over prior art materials.

The polymer-modified self-compacting concrete has due to its

In addition, the polymer modified self-compacting concrete

Color pigments are admixed to a respective desired color of the polymer-modified self-compacting concrete or on the zu

To achieve coating surface 1 of the component 2 applied concrete layer 4. Due to a very bright concrete base color due to the first in the

Embodiment used blast furnace CEM III has the

Polymer-modified self-compacting concrete on a very good colorability with color pigments, so that the polymer-modified self-compacting concrete can be very well color matched to specific requirements. Also at

Use of the Portland composite CEM II in the alternative Guidance form, the self-compacting concrete, depending on the other main constituents used in addition to the Portland cement clinker, ie the one or more Zumahlstoffen, well colored.

In order to apply the polymer-modified self-compacting concrete to the surface 1 of the component 2 to be coated, the shuttering 3 is arranged at a predetermined distance of at least 2.5 cm from the surface 1 of the component 2 to be coated. The distance between the formwork 3 and the surface 1 to be coated can be constant over a longitudinal extent and / or over a transverse extent of the surface 1 to be coated, or different distances can occur. However, a minimum distance of 2.5 cm must be maintained everywhere.

The formwork 3 is made of plastic, metal or wood, for example, and has a structured surface 5 in the example shown here. In the case of a formwork 3 made of wood, for example, a grain of the wood can already be used as a structured surface 5. In this way, the grain of the wood on a concrete surface 6 of the concrete layer 4 of polymer-modified

self-compacting concrete, d. H. be made visible on the redeveloped surface as a surface structure 7 in polymer-modified self-compacting concrete, as shown in more detail in Figure 2. As a result, by means of the polymer-modified self-compacting concrete formwork structures similar to an original surface can also be made visible on redeveloped surfaces.

The polymer-modified self-compacting concrete is applied by filling in a cavity between the formwork 3 and the surface to be coated 1 of the component 2 on the surface 1 to be coated. Due to its rheological properties, it leveled automatically and vented, so that no additional compaction energy is required.

The polymer-modified self-compacting concrete is, as shown here, particularly advantageous on a surface 1 to be coated of the component 2 can be used, which is oriented substantially vertically. However, it can also be used on differently oriented surfaces, for example on horizontally oriented surfaces.

FIG. 2 schematically illustrates the concrete surface 6 of the surface 1 coated with polymer-modified self-compacting concrete, and has a surface 5 corresponding to the structured surface 3 of the formwork 3

Surface structure 7 as a relief.

LIST OF REFERENCE NUMBERS

to be coated surface

component

formwork

concrete layer

structured surface

concrete surface

surface structure

Claims

PATENT APPLICATIONS

1. Self-compacting concrete,

with a share of at least 300 kg of blast-furnace cement per m ^{3 of} concrete, the blast-furnace cement occupying a proportion of 20% by mass to 64% by mass

Portland cement clinker and accounting for 36 percent by mass

80% by weight of blastfurnace slag, with a share of at least

300 kg of limestone flour per m ^{3 of} concrete, with a share of at least 1400 kg

Aggregate of sand, gravel or grit per m ^{3 of} concrete, the

Aggregate has a maximum grain size of not more than 8 mm, with a

Styrene-acrylate copolymer in a proportion of 5% by mass

15% by mass of the blastfurnace cement, with a high-performance flow agent based on polycarboxylate ether with a maximum proportion

2% by mass of the blastfurnace cement and with water in one

Water / cement ratio of maximum 0.55.

2. Self-compacting concrete according to claim 1,

containing at least 340 kg of blast-furnace cement per m ^{3 of} concrete, the blast-furnace cement accounting for 20% by mass to 34% by mass

Portland cement clinker and accounting for 66 percent by mass

80% by weight of blastfurnace slag, with a share of at least

Aggregate of sand, gravel or grit per m ^{3 of} concrete, the

Aggregate has a maximum grain size of not more than 8 mm, with a

Styrene-acrylate copolymer in a proportion of 5% by mass

2% by mass of the blastfurnace cement and with water in one

Water / cement ratio of maximum 0.5.

3. Self-compacting concrete,

containing at least 300 kg of Portland composite cement per ^{m3 of} concrete, the Portland composite cement containing between 65% by mass and 94% by mass of Portland cement clinker and containing

6 mass percent to 35 percent by mass of at least one Umahlstoffes, with a share of at least 300 kg of limestone flour per m ³ concrete, with a share of at least 1400 kg aggregate of sand, gravel or grit per m ^{3 of} concrete, wherein the aggregate is a maximum grain size of 8 mm, with a styrene-acrylate copolymer in a proportion of 5% by mass to 15% by mass of Portlandkompositzements, with a high performance flow agent based on polycarboxylate with a maximum of 2 percent by weight of Portlandkompositzements and with water in a water / cement ratio of maximum 0.55.

4. Self-compacting concrete according to one of claims 1 to 3,

characterized by color pigments.

5. Method for producing a self-compacting concrete,

characterized in that a proportion of at least 300 kg of blast furnace cement per m ^{3 of} concrete, wherein the blast furnace cement is a proportion of

Portion cement clinker having a proportion of at least 300 kg of limestone powder per m ^{3 of} concrete, a proportion of at least 1400 kg of aggregate of sand, gravel or grit per m ^{3 of} concrete, the Aggregate has a maximum grain size of 8 mm maximum, a

Styrene-acrylate copolymer in a proportion of 5% by mass

15% by mass of the blastfurnace cement, a high-performance flow agent based on polycarboxylate ethers with a maximum proportion of 2% by mass of the blastfurnace cement and water in a water / cement ratio of not more than 0.55 mixed.

6. The method according to claim 5,

characterized in that a proportion of at least 340 kg of blast furnace cement per m ^{3 of} concrete, wherein the blast furnace cement is a proportion of

Styrene-acrylate copolymer in a proportion of 5% by mass

15 mass percent of blast furnace cement, a high performance flow agent based on polycarboxylate with a proportion of not more than 2 percent by mass of blast furnace cement and water in a water / cement ratio of not more than 0.5 mixed.

7. Method for producing a self-compacting concrete,

characterized in that a proportion of at least 300 kg Portland composite cement per m ^{3 of} concrete, wherein the Portlandkompositzment has a share of 65 percent by mass to 94 percent by weight Portland cement clinker and a share of 6 percent by mass to 35 percent by mass at least one Umahlstoffes, a proportion of at least 300 kg Limestone powder per m ^{3 of} concrete, a minimum of 1400 kg of aggregate of sand, gravel or grit per m ^{3 of} concrete, the aggregate having a maximum grain size of 8 mm, a styrene-acrylate copolymer with a proportion of 5% to 15% by mass of the Portland composite cement, a polycarbonyl ether-based high-performance flux containing not more than 2% by mass of the Portland composite cement and water mixed in a maximum water / cement ratio of 0.55.

8. The method according to any one of claims 5 to 7,

characterized in that color pigments are added and mixed.

9. Use of a self-compacting concrete according to one of claims 1 to 4 for producing a concrete layer (4), wherein the self-compacting concrete is applied to a surface to be coated (1) of a component (2).

10. Use according to claim 9,

characterized in that at a predetermined distance to the surface to be coated (1) of the component (2) a formwork (3) is arranged and the self-compacting concrete by filling in a cavity between the formwork (3) and the surface to be coated (1) of the component (2) is applied to the surface (1) of the component (2) to be coated.

11. Use according to claim 10,

characterized in that the formwork (3) at a predetermined distance of at least 2.5 cm to the surface to be coated (1) of the component (2) is arranged.

12. Use according to claim 10 or 11,

characterized in that a formwork (3) with a structured surface (5) at a predetermined distance to be coated

Surface (1) of the component (2) is arranged.

13. Use according to one of claims 9 to 12,

characterized in that the self-compacting concrete on an im

Essentially vertically aligned surface (1) of the

Component (2) is applied.