DE2322009A1 - PROCESS FOR CREATING OR REPAIRING TRAFFIC AREAS - Google Patents

Description

Process for the production or repair of traffic areas

The invention relates to a method for producing or repairing traffic areas such as industrial floors, Roads, airfields and the like.

It is known that when creating new traffic areas on a substructure, e.g. a grit and binding agent Hydrocarbon base containing intermediate layer and on this to apply a top layer of cement mortar and to compact »In a known method, this

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proceeded so that initially a tar or bitumen wrapped grit is applied to this base and then spread a cement mortar over this gravel layer is so that it penetrates to a certain depth in the cavities of the gravel layer.

This known method has the disadvantage that a relatively Rigid coating is created, which is hardly elastic and in large contiguous areas to heat tends. In addition, there is a risk of frost damage if there is water through the surface layer at cracks in winter penetrates through into the gravel layer, since this gravel layer is only a grain structure in the manner of a conglomerate concrete represents, the grains of which support each other point by point and leave large cavities between them.

A method for producing an elastic concrete suitable for use as a road _{surface is already known 9} in which the aggregates are first coated with bitumen and, after drying, bound with cement mortar. Hit; However, this method actually cannot produce an elastic road surface of sufficiently high strength, as the cement mortar itself hardens to a rigid, inflexible mass and the aggregates, which are surrounded by a thin bitumen skin, do not form a firm bond with the mortar. Furthermore, when the cement mortar shrinks, bites appear in the road surface, which reduce its strength

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and allow moisture to penetrate into the covering.

The object of the invention is to avoid these disadvantages and a method for producing or repairing Specify traffic areas with which a jointless surface can be produced, which is located under long-lasting Point loads not deformed due to its static stability, but on the other hand due to the high binding agent salary remains flexible.

The task for a new production of a coating is achieved in that the applied in the first operation, void-rich composite bituminous mix at least 70 wt.% Chippings are added, which is to be packed immediately in the hot state so that a degree of compaction is achieved at least 97% . The pavement compacted in this way has a voids content between 3/4 and 25 vol. As an example may serve that, at a desired high flexibility, a low void content z _ö B _o 10% by volume. Inversely with low flexibility, a high void content, for example, x 25 Vol. ** is to be selected. In the second step, a low-viscosity, water-compatible, oil and kerosene-proof slurry consisting of a plastic dispersion, cement, mineral fillers and water is spread over the built-in bituminous mix and vibrated in. Despite the flexibility described above, the covering has a high resistance to deformation, so that even under long-term

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permanent point loads do not apply to asphalt surfaces Tar or bitumen base, typical impressions arise. Furthermore, the high elasticity of the sludge and the simultaneously acting flexibility of the bituminous Mixed material cracks as a result of shrinkage, creep and temperature voltage off. Compared to a pure cement slurry the addition of a plastic dispersion results in a significantly more favorable ratio of Compressive to flexural tensile strength reached, which is about 2: 1 is.

Because the cavities specified in the recipe for the covering are filled in by the sludge to be applied in the second step, the surface is watertight and prevented thus the occurrence of frost damage.

The top layer to be produced in the first step is installed in a thickness of 2 - 5 egg. The cavities contained therein between 10 and 25 VoI · j6 are completely filled with the above-described slurry.

Especially useful it is when the bituminous coating of a bituminous mixture with at least $ 0 wt. ^ Grit grit 2.18 mm, mineral fillers of different particle Frank functions, a bitumen content of 3-5 »5 wt. # At a mixing temperature of 14-0 -180 C, applied to a stable substructure with road pavers and immediately in the hot state with smooth or rubber-tyred rollers to a degree of compaction of at least

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$ 97 is compressed. The void content of the compacted Due to its composition, coating amounts to 10-25 VoI · #. To. Cooling of the bituminous mix a slurry is applied in an amount of 5-15 kg / m2 and baked in with moose vibrators · The excess Sludge can be removed by pulling it off or sweeping it away.

When mending traffic areas, the one, tar or bitumen-bound surface course with a chippings content of more than 70% by weight and a voids content of less than 10 Vol. #, the procedure according to the invention is such that a low-viscosity, Waterproof, dust-free, road salt-resistant, oil and kerosene-proof slurry - consisting of a plastic dispersion, cement, mineral fillers and water - applied and into the existing cavities is vibrated in. The method can be used to advantage particularly where the damaged surface is sufficient Has voids to contain the slurry and an open surface texture sufficient interlocking guaranteed between asphalt pavement and sludge. By applying the slurry according to the invention, the repaired traffic areas have a high resistance to oil and kerosene, which conventional asphalt surfaces do not have.

It can be advantageous for different applications that

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Any excess remaining on the surface after shaking To remove sludge by pulling it off or sweeping it away. away so that the grain peaks of the asphalt surface are visible will. This creates a particularly good grip for the covering, which is suitable for various traffic areas is desired · Has been found to be particularly useful proven when the muds out

10-25 Gw, parts of plastic dispersion, 25-10 parts by weight of cement,

65 parts by weight of mineral fillers and about 9 parts by weight of water

is put together. The plastic dispersion can here an aqueous dispersion of polyvinyl acetate, which contains about 50 wt. # water

In the drawing is a traffic area according to the invention shown in a partial cross-section.

The on the substructure 10, for example, an asphalt binder to be applied / top layer 11 is made from a bituminous mix that contains at least 70% by weight of grit Contains grain size 2/18 mm and consists of mineral fillers different grain fractions and a bitumen content of 3-5 * 5 wt. # has »Daw mixed material is in a sta · * · tionary mixing plant at a temperature of about 140-180 ° e mixed and applied to the substructure with road pavers, w ο it immediately with a heavy smoothing wheel or «. Gum— miradwalzen is compacted · Here, at least one

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When a degree of compaction of 97 # is reached, · Dag mix is composed in such a way that after its compression it has a void content of about 10 ^ 25 vol. # Contains.

After the basin layer 11 has cooled down, a slurry is produced in compulsory mixers, which is made up of cement, Sand, a plastic dispersion composed of polyvinyl acetate and water · The individual Components are in the order given earlier brought into the mixer and mixed intensively for about 2 minutes »The plastic dispersion should be 10-25 parts by weight, the cement 25-10 parts by weight, the mineral fillers should be 65 parts by weight. The water requirement is about 9 parts by weight.

After mixing, the. Sludge 12 compressed to di # Cover layer 11 spread out and with surface rub- learn vibrated into the top layer 11, the sludge me depending on the composition and thickness of the top layer 11 up to 5 ca in this ·; penetrates and fills the existing cavities on the surface of the cover layer 11 remaining sludge can be drawn off or swept away, to create a smooth or non-slip surface.

The invention is not restricted to the exemplary embodiment. For example, it is also possible for others To use plastic dispersions that are of low viscosity,

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are water-compatible, oil- and kerosene-resistant and the Improve adhesion and the ratio of pressure to bending have a favorable effect on tensile strength. Besides, it is possible to change the mixing ratios within the specified limits in order to increase the traffic areas to adapt to the stresses that arise.

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Claims (1)

Claims experienced for the production of traffic areas such as industrial floors, roads, airfields and the like, in which a surface layer of bituminous mix with a hydrocarbon-based binder is installed and compacted on a substructure and then a slurry is applied, characterized in that the surface layer (11 ) from a minimum of 70% by weight of chippings, bituminous mix contained in the mineral mixture and the sludge (12). a low-viscosity, water-compatible, oil- and kerosene-resistant plastic dispersion, cement, mineral fillers and water and then the top layer (11) applied to the substructure (10). is compacted in the hot state to a degree of compaction of at least 97 % , the bituminous mix being so composed that after compaction a void content of 10-25 vol is vibrated in. 2. The method according to claim 1, characterized in that that the top layer (11) is applied to the substructure (10) in a thickness of 2-5 cm. 5 · Method according to claims 1 and 2 characterized by net that the bituminous mix with at least 409847/0525 70 wt. # Of chips of grain size 2/18 mm, a bitumen content of 3-5 »5 wt.% And mineral Füllatoffen different grain Frank TION prepared at a mixing temperature of 140-180 ⁰ C, applied with pavers on the substructure and at once in the hot state is compacted with smooth or rubber-tyred rollers bia to a degree of compaction of at least 97 ° / ° and that after cooling the surface layer produced in this way, the sludge is spread on the surface layer in an amount of 5-15 kg / m2 and is vibrated in with surface vibrators. 4, A method of repairing road surfaces such as industrial floors, roads, plug seats and the like., Which have a% tar or bituminous covering layer having a grit content of more than 70 wt., And a void content of less than 10 vol. #, Characterized in that that a slurry consisting of a low-viscosity, water-compatible, oil- and kerosene-resistant plastic dispersion, cement, water and mineral fillers is spread out on the damaged surface of the top layer and vibrated into the top layer. 5. The method according to any one of claims 1 to 4-, characterized in that that the excess sludge remaining on the surface after vibrating is removed or sweeping away. 409847/0525 - 11 ~ 6. The method according to any one of claims 1 to 5, characterized in that that for the sludge 10-25 parts by weight of plastic disp er sion, 25-10 parts by weight of cement, 65 parts by weight of mineral fillers and about 9 parts by weight of water be used. 7. The method according to any one of claims 1 to 6, characterized in that that the plastic dispersion is an aqueous dispersion of polyvinyl acetate, which is about 50 Contains wt / for water. 4 0 9 B L ί /! Ν "? Γ Blank page