DE102006034969A1 - Manufacturing method for multi-colored high-strength concrete products with sharp-contoured color transitions, involves connecting multi-colored concrete mechanically during hardening in grout casting mold - Google Patents

Abstract

The method involves connecting multi-colored concrete mechanically during the hardening in the grout casting mold, which is fixed by different textures (semisolid or fluid) of mixing methods followed by each other. The specified sharp-contoured color transitions are maintained properly. The reaction entails an exotherms running off during the fast hardening by precipitation of the hard gypsum, which accelerates hardening by precipitation of the total concrete product.

Description

The Process for the production of multi-colored, high-strength concrete products with sharp color transitions Applicable where there is a homogeneity of the material and a high Weight matters and also a smooth-walled, visually appealing and deep-acting surface expressly required becomes.

problem Statement

Colored high-strength concrete products, such as porcelain stoneware tiles, concrete slabs, façade elements are manufactured industrially at times with high mechanical complexity. These usually have a two-dimensional flat appearance. With the well-known in the art Tomolithtechnik ¹ multicolor concrete products can be produced in a block casting process. But only plates or cuboid products are produced. But if these products have concave and / or convex curved surfaces, this is only possible with very high technical effort through the use of milling machines. This effort can be circumvented for monochrome concrete products through the application of the cast stone method with plastic or silicone molds. This reduces the post-processing effort after curing.

Become but about visual and aesthetic claims to meet two or two multi-colored concrete products with contour-sharp color transitions desired, increases the temporal Effort on the manufacturing side again, especially by lengthy successive casting operations and to be observed curing times per color fraction from 10 to 24 hours until demolding.

Please refer also literature references to the prior art: (1), (2) and (3)

Troubleshooting

through an advanced manufacturing process for high strength Concrete leaves make production much more efficient. Besides, they are Products of hitherto unknown quality and charisma with new ones Shapes and functions can be produced.

used is the well-known stone casting process in silicone molds. The mixing different colored concrete is done in separate compulsory mixing operations and almost at the same time. So that the different colored concrete in the pour in in the form not mixed and it to uncontrolled colors or mixing comes, the individual color fractions with made of different consistencies. This will ensure that the individual color components do not mix and become one clean contours sharp and the position exactly defined color transition arises and also after curing preserved. On the other hand, the individual concrete components combine by the exchange of moisture so tightly together that they go after the curing process only with the known machines and tools (sawing, milling, drilling, chisel etc.) are separated, from which the unrestricted high mechanical strength results. When concrete products add to the extra Safety and / or due to special static requirements an even higher one Must have strength, can easily steel reinforcements o. Ä. by pouring to be embedded with.

The different consistencies are achieved by the different recipes during mixing. Basically, the higher the proportion of hard plaster (25 to 50%), the faster the curing (from 10 min after mixing end) with shorter demolding times (from 30 min after mixing end), that is, the temporal consistency change from plastic to viscous and solid state can be adjusted by the recipe. In addition, the flowability of the material to be mixed is controlled by the addition of flow agents (0.2 to 1.2%). The higher the flow agent content, the greater the diligence ability during the plastic consistency phase. The percentage composition of the formulations: 1 cement or self-compacting high-performance binders 50 to 75% by mass (in addition to 2) 2 hard gypsum 25 to 50% by mass (in complementary relation to 1) 3 superplasticizer 0.2 to 1.2% by mass, based on the sum of 1 and 2 4 deaerators 0.2% by mass, based on the sum of 1 and 2 5 cement-colored color pigments to 8% by mass, based on the sum of 1 and 2 6 aggregates (sand), if necessary to 20% by mass, based on the sum of 1 and 2 7 water 19% by mass, based on the sum of 1 and 2

Of the Mixing should be done in compulsory mixers with at least five minutes mixing time respectively.

embodiment

Described below is a comparatively simple application as an exemplary embodiment. In principle, all applications can be realized in which the concrete casting method in silicone rubber molds is possible by casting. In addition, embedding of reinforcing steel or optical fibers can be realized for information functions. Components during the mixing process: 1 Dyckerhoff white cement 75% mass parts 2 hard gigs Giluform 25% mass parts 3 flow agent Maxiflow 1.0% by mass, based on the sum of 1 and 2 4 breathers Optec 960 0.4% by mass, based on the sum of 1 and 2 5 10 cement-fast color pigments 8% by mass, based on the sum of 1 and 2 6 water 19% by mass, based on the sum of 1 and 2

The Duration of the mixing process in the compulsory mixer was per color fraction 5 minutes.

The Shell made of high-strength concrete is ten-colored, extremely low-pore and smooth-walled, with sharp color transitions within 12 hours been prepared. In general, you can per color fraction 20 to 60 Set min production time. The technical data are: weight approx. 330 g, circular, diameter 120 mm, height 24 mm, minimum material thickness 4 mm.

The In detail, the views shown in the drawing are:

1 Top view; the dotted lines show the borders to the differently colored concrete

2 Side view; the dashed line shows the hidden outer edge; the representation of the color boundaries by dotted lines is omitted for reasons of clarity

3 Under side view; the dotted lines show the borders to the differently colored concrete

The individual colored components (color fractions) are:

1

White

2

ocher

3

orange

4

red

5

Light Blue

6

green

7

dark blue

8th

black

9

Gray

10

yellow

advantages

• - efficient Production of multi-colored high-strength concrete products with concave and / or convex Exterior surfaces and contour sharp color transitions
• - visually attractive appearance of the homogeneously colored multi-colored concrete products
• - smooth-walled, make extremely low-pore outer surfaces Concrete products for many applications in the daily Life usable
• - in the The demoulding times of Lowered to 1 hour for 10 hours
• - from it causes faster dehydration and hardening on all sides
• - the expired exothermic reaction in the curing of the hard plaster favors and accelerates the curing the cement components; an additional heat from the outside, as usual in the production of ultra-high-strength concrete, completely eliminated
• - costly Milling Machines be for the post-processing is not needed; The tool wear (milling cutter) is completely eliminated

Literature sources:

• (1) "Tomolith - Steinspielereien mit Betonwerkstein", graduate engineer Dipl.-Ing. Martin Möllmann in: http://dyckerhoffweiss.de/index.php?spr=de&m=art&txt=artikel11, 20.11.2005, technical paper
• (2) "Sustainable Construction with Ultra-High-Strength Concrete (UHPC) for Improving Performance, Relieving Environmental Stress and Reducing Costs in Concrete Construction", Call for Proposals DFG Priority Program, Prof. Dr.-Ing. Michael Schmidt, University of Kassel, Institute for Structural Engineering, Department Materials Engineering , 01.11.2004
• (3) "Coloring of Concrete", Dipl.-Ing.-Dipl.-Ing. Martin Möllmann in: http://dyckerhoffweiss.de/index.php?spr=de&m=art&txt=artikel01, 01.06.2006, technical paper

Claims (3)

The process for the production of multi-colored, high-strength concrete products with sharp color transitions is characterized by different consistencies (semi-solid and liquid) of the successive mixing operations of different colored concrete, while mechanically firmly bonded together during curing in the mold, but still exactly predetermined contour sharp Color transitions are preserved. The process for the production of multi-colored, high-strength concrete products with sharp contours color transitions according to the main claim, characterized in that the different consistencies by different formulations in the ingredients 1 . 2 and 3 to be reached: 1 cement or self-compacting high-performance binders 50 to 75% by mass (in addition to 2) 2 hard gypsum 25 to 50% by mass (in complementary relation to 1) 3 superplasticizer 0.2 to 1.2% by mass, based on the sum of 1 and 2 4 deaerators 0.4% by mass, based on the sum of 1 and 2 5 cement-colored color pigments to 8% by mass, based on the sum of 1 and 2 6 aggregates (sand), if necessary to 20% by mass, based on the sum of 1 and 2 7 water 19% by mass, based on the sum of 1 and 2 The process of producing multicolor, high-strength Concrete products with sharp contours color transitions according to claim 2 characterized characterized in that the expiring exothermic reaction during the fast curing of the hard plaster accelerated curing of the total concrete product entails.