OUR SERVICES

Surface Treatments

Surface treatment (ST) is a method for road maintenance and renovation, right through to reinforcement construction – making it our all-rounder! There is almost nothing it cannot do! Thanks to its wide range of combination options, such as multiple layers, double OB or OB with split template, the OB can be used in a wide variety of applications and thus meet a wide range of customer requirements. The principle is usually similar. A new, very thin layer is applied to the existing road surface, the surface is sprayed with a binding agent and then sprinkled with aggregate. In Germany, crushed natural stone is used for sprinkling. Particularly when light-colored stone types are used, the ST also serves as a reflective layer and thus inhibits the aging of the underlying asphalt layers, as the temperature load can be reduced by up to 7 degrees.

Simple ST

A simple surface treatment (ST) in road construction is a measure for the repair and maintenance of roads. A new, very thin layer is applied to the surface of an existing road. This method is also suitable for the intermediate construction of roads. It is characterized by efficiency and cost-effectiveness and is frequently used on rural, district, municipal, and commercial roads.

Pre-cleaning: The substrate is cleaned to ensure perfect contact between the binding agent and the substrate.

Application of the binding agent: The binding agent is sprayed onto the substrate from a low height using ramp sprayers.

Splitting: High-grade chippings are applied to the surface.

Rolling: The applied aggregate is rolled in to increase the adhesion between the individual grains and the binding agent.

Sweeping: This is done after about 4-7 days using a sweeper.
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Double grit spreading

A surface treatment with double grit spreading (OB-dA) is a special type of surface treatment (ST) used for the repair and maintenance of roads. The road is treated in two layers to achieve improved durability and grip.

Pre-cleaning: The surface is cleaned to ensure optimum adhesion between the binding agent and the substrate.

First layer: The binding agent is applied to the cleaned surface, followed by a layer of high-grade chippings with a coarser grain size.

Second layer: A second layer of high-grade chippings with a smaller grain size than in the first layer is then applied.

Rolling: The applied aggregate is rolled in to increase the adhesion between the individual grains and the binding agent.

Sweeping: This is done after about 10-15 days using a sweeper.
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Double surface treatment

Double surface treatment (dST) is a method for repairing, maintaining and substantially reinforcing roads by applying two layers of binding agent and grit. This technology offers improved durability and grip of the road surface.

Pre-cleaning: The surface is cleaned to ensure optimum adhesion between the binding agent and the substrate.
First layer: The binding agent is applied to the cleaned surface, followed by a layer of high-grade chippings. This layer is then compacted with a roller.
Second layer: Another layer of binding agent is applied to the first layer, followed by a second layer of high-grade chippings. This layer is also compacted to ensure the best possible adhesion.
Rolling: The applied aggregate is rolled in to increase the adhesion between the individual grains and the binding agent. This can be done after the second layer or after the first layer.
Sweeping: This is done after about 10-15 days using a sweeper
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Double ST with
sprinkling

A sprinkling layer is usually applied when the substrate is not ideally suited for the adhesion of the binding agent. As the name suggests, this involves sprinkling a layer of grit onto the substrate. Depending on the customer's requirements, this is followed by a single ST, an ST with double grit sprinkling or a double ST. Our installation trains can spray, split and pre-compact in a single operation using an integrated pressure roller. This enables us to work efficiently and, above all, with consistently high quality.

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Impregnation

The impregnated macadam surface is a proven method for cost-effective road reinforcement. The existing unbound base course is reprofiled and supplemented if necessary. This layer is then “soaked” with high-grade chippings and bitumen emulsion and compacted. The optimum impregnated surface consists of three layers. The addition of polymers increases the longevity and strength of the surface treatment. The binding agent adheres very quickly to both damp and dry rock. Reducing the amount of emulsion can also improve water permeability.

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Emulsions

We produce almost all types of bitumen emulsions and process them with our own machines as a complete or contract service. Our bitumen emulsions are also available in service tanks, combi patchers, drums and small containers. A bitumen emulsion is a mixture of bitumen, water and various emulsifiers. Both road construction bitumen and polymer-modified bitumen can be used for production. Depending on the type of bitumen emulsion, the bitumen content can be between 40 and 70 percent.

Bitumen emulsions are among the most commonly used raw materials in road maintenance because they offer many advantages. The most important of these are:
No risk of combustion or fire
No risk of explosion due to solvent vapors
Only release water during setting
Do not penetrate the ground
Are processed “cold” and therefore save energy
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We would be happy to advise you on which bitumen emulsion is suitable for which substrate, road conditions, and weather conditions.
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