Inset Concrete Paving

How State-Of-The-Art Road Construction Machinery Produces Concrete Pavements

The following sequence of operations is typical of inset paving: First of all, trucks unload the concrete in front of the machine.

The slipform paver then spreads the concrete over the full paving width with its spreading auger or spreading plow and forms the concrete profile for the roadway with the slipform mold. HF vibrators inside the slipform vibrate at high frequency, expelling air from the concrete and thereby compacting it.

The high-frequency vibrations generated by electric vibrators make it possible to achieve homogeneous compaction.

When working with smaller slipform pavers, a spreading auger distributes the concrete in front of the front metering screed, behind which the concrete profile is then formed.

Larger slipform pavers, on the other hand, use a spreading plow that distributes the concrete over the entire working width.


Of Dowels, Tie-Bars, and Joints

The slipform paver always remains in motion during the paving operation, its working speed ranging from 1 to 2 meters per minute. At the same time, the paver can also insert dowels or tie-bars in the fresh concrete, which serve as reinforcement. Contraction joints are later cut into the concrete pavement above the reinforcements, as they ensure that the cracks which are invariably produced as a result of stresses and temperature fluctuations are diverted into the concrete pavement in a controlled manner.

Automatically inserted dowel bars transfer loads from one concrete slab to another.

A Burlap Drag Gives the Surface Grip

The road surface is leveled using finishing beams and super-smoothers. A burlap drag is often pulled over the surface to create a non-skid texture. A texture curing machine is usually used to apply a dispersion to the fresh concrete to ensure it cures evenly.

A burlap drag gives the surface a fine-grained texture.

Spraying on a curing compound, a liquid after-treatment agent for concrete, prevents the slab from drying out too quickly and unevenly.

The super smoother made of high-quality material creates a perfectly smooth surface.

Benefits
Long lasting roads
Resistant to surface deformation
Automated production of concrete surfaces

Job Reports

Concrete pavement with continuous reinforcement stands out for its low cost of upkeep. They are low-maintenance, extremely durable, and cost-effective.

WIRTGEN WPS 62i concrete paving train

During the construction of a concrete expressway between the major Indian cities of Vadodara and Mumbai, the WIRTGEN SP 1600 set four world records.

World Records with the SP 1600 in India

The power of the WIRTGEN GROUP as the engine driving the construction of the İstanbul Yeni Havalimanı airport – the largest infrastructure project in the history of Turkey.

Airport construction Istanbul

For the expansion of the A9 highway, a construction company relied on the high bearing capacity of concrete slabs and the perfect evenness and grip of the road surface.

Precision in concrete paving

In-place cold recycling of bituminous materials was carried out during a project in Illinois. For this purpose, the contractor selected the 2200 CR recycler with a working width of 3.80 m.

Cold recycling at Highway 15

The taxiways, runways, apron, and the south runway at the airport cover a total of 1.5 million square meters. Paving was carried out by Wirtgen slipform pavers.

Concrete paving at BBI Airport
Are you interested in asphalt paving?

When paving asphalt, the road paver always sets the pace. After all, its performance determines, for instance, how many asphalt mixing plants are engaged, how many trucks are needed to transport the mix to the job site, and how many rollers are needed for final compaction.

Click here for more information on asphalt paving with road pavers from VÖGELE.

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