WO2009089920A1

WO2009089920A1 - Concrete mixture

Info

Publication number: WO2009089920A1
Application number: PCT/EP2008/052256
Authority: WO
Inventors: Jochen Möller
Original assignee: Nightec Gmbh & Co. Kg
Priority date: 2008-01-14
Filing date: 2008-02-25
Publication date: 2009-07-23
Also published as: DE102008004165A1; DE102008004165B4

Abstract

The invention relates to a concrete mixture comprising binder, water, concrete aggregates, and concrete additives, characterized in that, furthermore, the concrete mixture comprises photoluminescent pigments, and the use thereof.

Description

concrete mix

The invention relates to a concrete mixture comprising binders, water, concrete aggregates and concrete additives.

In many areas of daily life it is necessary and advisable to provide well-visible illuminations and / or markings. So walkways are usually illuminated for safety, road or lane markings, - guides or limits by markings and / or lights highlighted, illuminated emergency exits, obstacles highlighted by lighting or reflective painting, etc.

So it is e.g. For marking purposes or lighting purposes known to use not only reflective painting, but even use bright paving stones in concrete plaster bandages. For this purpose, battery-operated lights are used with a housing made of plastic or metal, which have approximately the same dimensions as the laid pavement. These lights are integrated into the plaster composite. There are also lights that are connected to solar panels, so that any batteries can be charged during the day. However, these glowing stones must be opened and maintained in any case. Besides, disturbances such as e.g. broken bulbs (bulbs, etc.).

In addition, it is also known to provide stones with a phosphorescent paint. However, when using phosphorescent paints, e.g. As in the field of flooring the problem that this paint is removed over time by mechanical stress. Also, the painting is subject to a significant weathering.

The object of the present invention is therefore to provide a simple and permanent possibility for luminous markings or parts.

This object is achieved by the reproduced in claim 1 concrete mix and their use according to claim 17 or 18. The fact that the concrete mixture further comprises photoluminescent luminescent pigments, it is possible to provide a light source in the concrete, ie the produced of the corresponding concrete objects of any kind shine. The lighting of the objects is resistant to wear and weather, as the lamp is evenly distributed throughout the material and appears as long as the concrete layer in which it is contained, was completely removed or weathered. The luminescent pigments are therefore not only present on the surface, but integrated into the concrete composite. As a result, a high mechanical abrasion resistance is achieved because the pigments are protected by the adjacent sand and quartz particles. Maintenance or replacement of bulbs is not necessary.

Thus, while maintaining the positive mechanical properties of the concrete (abrasion resistance, compressive strength etc), which also allows virtually any shape and offers a variety of uses, a cost-effective, maintenance-free and flexible way has been created to provide "permanently" glowing markings or parts in a simple manner by using the concrete mixture according to the invention.

Thus, the concrete mixture can be used as a base mixture for the production of virtually any known concrete, in particular a concrete selected from the group consisting of site concrete, ready-mixed concrete, shotcrete, underwater concrete, rolled concrete, spun concrete, vacuum concrete, construction concrete, screed concrete, aerated concrete, fiber concrete, mineral concrete, concrete concrete, self-compacting concrete, high-strength concrete, ultra-high-strength concrete,

Glass foam concrete, self-cleaning concrete, acid-resistant concrete (for example treated with phosphonic acid), complementary to translucent concrete, exposed concrete, asphalt concrete, chippings, polymer concrete, in-situ concrete, paper concrete.

The luminescent pigments may be fluorescent and / or phosphorescent or luminescent luminescent pigments. Depending on the intended use, combinations of pigments of these different pigment classes are also possible. Thus, fluorescent and phosphorescent pigments can be mixed, so that special effects and optical designs are possible. The combination of different luminescent pigments for Achieving "mixed" effects through different colors, brightness, duration of light, etc. is an option.

If the mixture is not produced with luminescent (phosphorescent) pigments, but with fluorescent pigments, the luminescent effect usually occurs only with illumination of the objects UV-containing light, depending on the pigment and only at certain frequencies in appearance.

Fluorescent pigments can have different colors in daylight. The daylight color and the occurring luminous color on irradiation with light of the activation frequency may be different or the same.

Examples:

- daylight color whitish, light color blue - daylight color bright red, light color bright red

When selecting pigments, it is important to ensure that the pigments can withstand the environment (moisture, strong UV radiation, etc.), especially in outdoor use.

Thus, at the same time, phosphorescent and fluorescent pigments can also be used in the production of the concrete mixture. This results in a glow under UV irradiation and a glow in the dark. A pleasant added benefit is that the light needed by the fluorescent effect charges the phosphorescent pigments at the same time.

An example of an application of paving bricks made from mixed luminous mixtures is the use as paving stones to mark parking areas. The concrete mix was produced with pigment of the daylight color white and the UV light color blue. The pigment is UV stable and therefore suitable for outdoor use. The white daylight color ensures that the paving stones look like normal white paving stones during the day and are indistinguishable from conventional parking paving stones. When darkness falls, the parking lot lighting is switched on. However, in addition to the standard lamps and black light bulbs are used or supplemented in the existing lamps. As soon as the black light lamps are switched on, the fluorescent paving stones glow in the blue luminous color. If this light is switched off, the lighting effect goes out.

When using fluorescent pigments, a strong luminous effect is thus possibly achieved by illumination by means of artificial or natural light sources.

Advantageously, luminescent pigments are used which luminesce in the visible range. Particularly preferred are the use of sulfides and / or aluminates and / or phosphorus-based pigments as luminescent pigments.

Most preferably, the luminescent pigments comprise strontium aluminates, fluoroaluminates or zinc sulfides.

Due to the low efficiency of bulbs and the chemical instability of light bulbs, it has not been possible to produce illuminated concrete. According to the invention, the luminescent pigments for the alkaline environment of the concrete are stabilized.

This can e.g. by a protective coating depending on the pigment property for alkaline protection and acid protection. Alkaline protection is important because the cement in the concrete is very alkaline when applied and cured, at max. pH about 12.6.

Acid protection may also be important, depending on the later use of the product being made. Cement products are generally susceptible to acids as acids dissolve the cement structure. Depending on the application of the cement end products they can therefore be protected against acids. Accordingly, care must be taken to ensure that the pigment is not destroyed. For example, phosphonic acid is used in the concrete sector for this purpose. Phosphonic acid is also a standard retarder in the concrete field, and in this case too, the pigment must be tailored to it. Protection of the pigment must also be given in this case. The concrete mixture preferably contains from 1 to 50% by weight, preferably from 10 to 40% by weight and in particular from 20 to 30% by weight, of luminescent pigments. The proportion of luminescent pigments depends on the desired luminosity and the luminous power of the pigments.

As a binder, any concrete binder can be used. In particular, cement, preferably white Portland cement, can be present in the mixture in an amount of up to 30% by weight. Alternatively or additionally, a polymer concrete binder may be included in an amount of up to 70% by weight. If both cement and polymer binder are contained in the concrete mix, the cement actually only has filler function and correspondingly small amounts are used. As the polymer concrete binder is preferably a resin selected from the group consisting of acrylate, epoxy, polyester, in particular an unsaturated polyester resin. The use of such polymers also has the advantage that the resulting concrete becomes more transparent, so that even below the outer layer lying pigment particles contribute to the luminous effect and thus to its increase.

In addition, a Tranzparenzverstärker can be used in the concrete mix. This is preferably highly transparent quartz powder and / or

Fused silica and / or quartz glass and / or acrylate resin, in an amount of 10 - 60% by weight. Depending on its suitability, this aggregate can replace the otherwise normally added normal sand. Transparency enhancers increase the luminosity depending on the proportion in the mixture and the degree of transparency of the transparency enhancers used and, if appropriate, permit a reduction in the proportion of cement, since they also partly serve as binders, such as e.g. with the addition of acrylate resin.

In addition, color pigments can be added to the concrete in addition to the luminescent pigments. They already allow during the day a certain marking effect of the parts made with the concrete.

The basic mixture can be applied in all known types of concrete, including: site-mixed concrete, ready-mix concrete, shotcrete, underwater concrete, rolled concrete, spun concrete, vacuum concrete, construction concrete, screed concrete, aerated concrete, fiber concrete, mineral concrete, concrete concrete, self-compacting concrete, high-strength concrete Concrete, ultra-high-strength concrete, glass foam concrete, self-cleaning concrete, acid-resistant concrete (eg treated with phosphonic acid), complementary for translucent concrete, exposed concrete, asphalt concrete, chippings, polymer concrete, in-situ concrete, paper concrete.

Exemplary uses for producing articles of bright concrete are building curtains; Cleaning material, in particular exterior plaster, Spritzbewurf, socket plaster; screed; Prefabricated parts, in particular finishing steps / staircases, roofing concrete slabs, beams, pillars; Bricks, concrete furniture (e.g., benches, flower boxes, tables), swimming pool components (e.g., deckle curtains, launching blocks, jump equipment), balconies and balcony attachments, covers (e.g., manhole covers, outlet covers, bezel panel controls); Clinker; Enclosures (e.g., walls, pedestal walls); grouting; Surrounds of walls; partitions; Prefabricated components, in particular exterior walls, curbs, separating elements, supports; Roof structures and roof elements; Parts of and complete ramps, sidewalks and open spaces and traffic areas as well as their boundaries or complete markings; Parts of or whole obstacles including their markings; Slope securing stones (L stones, etc.); Grandstand safety devices, in particular markings of the safety-relevant escape routes or railings and / or other boundary boundaries; supporting and non-supporting walls; Demarcations incorporated in soils.

It is understood that only a part of the objects can be produced with the concrete according to the invention in order to enjoy the luminous effect.

Further details, features and advantages of the invention will become apparent from the following description of exemplary embodiments.

example 1

For the production of a molded block, here a paving stone, the following ingredients are mixed:

23% by weight of white Portland cement, 50% by weight of crystalline silica (quartz sand), 27% by weight of crystalline strontium aluminate (Nemoto LumiNova BG-300M) From this mixture, a concrete is produced, which is then filled into molds or pressed and removed after setting from the same.

The mixture is mixed as requested by the manufacturer. In the so-called wet-cast process, we work with a high water content and the concrete mixture flows into the molds and hardens. When using only earth-moist concrete is used with concrete presses, the molded block remains only during the pressing process in the mold and then stable without form and hardens.

You get a cobblestone, which is excited by the daylight, lit at night. The integral combination of the crystalline luminescent pigments in the concrete ensures high abrasion resistance and permanent functioning of the paving stones.

The stones thus obtained shine after sufficient sun exposure in the

Darken for about 12 hours after. However, the lighting duration can be influenced by the choice of the pigment.

Example 2 Provision of a Base Concrete Mix with Tranzparenzverstärker To produce the concrete mix

- 27 wt .-% zinc sulfide, chemically stabilized for the alkaline environment by a protective coating and - 50 wt .-% quartz powder (d10% 4μm, d50% 37μm, d90% 1 19μm) mixed and stored moist with exclusion of air.

Example 3

Production of roadside bricks In order to produce a concrete mixture, the base concrete mixture from Example 2 is admixed with 23% by weight of white Portland cement.

The concrete thus obtained is filled in suitable molds and removed after setting, whereby luminous curbs are obtained. Example 4

Production of roadside stones

To increase the transparency and thus the luminosity of the mixture

Example 3 modified with the aid of acrylate.

For this purpose, only 8 wt .-% cement are used. The remaining part is replaced by 15% by weight of acrylate.

The concrete thus obtained is filled in suitable molds and removed after setting, whereby luminous curbs are obtained.

The stones thus obtained glow after sufficient exposure to the sun in the dark for about 12 hours. The lighting duration can also be influenced here by the choice of the pigment. However, the luminosity is increased by about 30% in direct comparison to the concrete mixture without Arcylat.

Example 5

Production of lightweight concrete parts from polymer concrete mixture as polymer concrete The mixture from example 4 is replaced by complete replacement of the

Acrylate modified by unsaturated polyester resin. Furthermore, instead of 8% by weight of white Portland cement, only 3% by weight are mixed in and the remaining portion is likewise replaced by the polyester resin.

The polymer concrete produced in this way has better luminous properties in addition to the typical mechanical properties of a polymer concrete due to a lower proportion of non-translucent materials.

Claims

claims

1. concrete mixture comprising binder, water, concrete additives and concrete additives, characterized in that the concrete mixture further comprises photoluminescent luminescent pigments.

2. Concrete mixture according to claim 1, characterized in that the luminescent pigments are fluorescent and / or phosphorescent or luminescent luminescent pigments.

3. Concrete mixture according to claim 1 or 2, characterized in that the luminescent pigments luminesce in the visible range.

4. Concrete mixture according to one of the preceding claims, characterized in that the luminescent pigments are sulfides and / or aluminates and / or phosphorus-based pigments.

5. Concrete mixture according to claim 4, characterized in that the luminescent pigment comprises strontium aluminates, fluoroaluminates or zinc sulfides.

6. Concrete mixture according to one of the preceding claims, characterized in that the luminescent pigments are stabilized for the alkaline environment of the concrete.

7. Concrete mixture according to one of the preceding claims, characterized in that 1 to 50 wt .-% luminescent pigments are included.

8. Concrete mixture according to one of the preceding claims, characterized in that 10 to 40 wt .-% luminescent pigments are included.

9. Concrete mixture according to one of the preceding claims, characterized in that 20 to 30 wt .-% luminescent pigments are included.

10. Concrete mixture according to one of the preceding claims, characterized in that different luminescent pigments are contained.

1 1. Concrete mixture according to one of the preceding claims, characterized in that the binder cement, preferably white Portland cement, is contained in an amount of up to 30 wt .-%.

12. Concrete mixture according to one of the preceding claims, characterized in that polymer concrete binder is contained in an amount of up to 70 wt .-%.

13. Concrete mixture according to claim 12, characterized in that as

Polymer Concrete Binder is a resin selected from the group consisting of acrylate, epoxy, polyester or combinations of the aforementioned.

14. Concrete mixture according to claim 12 or 13, characterized in that the polymer concrete binder is an unsaturated polyester resin.

15. Concrete mixture according to one of the preceding claims, characterized in that a Tranzparenzverstärker in an amount of 10 - 60 wt .-% is included.

16. Concrete mixture according to claim 15, characterized in that as transparent barrier quartz powder and / or fused silica and / or quartz glass and / or acrylate is contained.

17. Use of the concrete mixture according to one of the preceding claims as a base mixture for producing a concrete selected from the group consisting of site-mixed concrete, ready-mixed concrete, shotcrete, underwater concrete, rolled concrete, spun concrete, vacuum concrete, construction concrete, screed concrete, aerated concrete, fiber concrete, mineral concrete, concrete concrete, self-compacting concrete , high-strength concrete, ultra-high-strength concrete, glass foam concrete, self-cleaning concrete, acid-resistant concrete (eg treated with phosphonic acid), additionally for translucent concrete, exposed concrete, asphalt concrete, chippings, polymer concrete, in-situ concrete, paper concrete.

18. Use of the concrete according to claim 17 for the production of luminous Objects or parts thereof.