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Millions of kilometers bear our signature
Professional solutions for compaction technology and asphalt construction.Millions of kilometers bear our signature
Professional solutions for compaction technology and asphalt construction.
Successful Projects
The area around Notschrei is extremely popular with tourists, especially winter sports enthusiasts and hikers. Not only the busy pass road, but also many service roads wind their way up the slopes – service roads that occasionally need to be repaired as part of land consolidation. In the Black Forest, the combination of land consolidation and road renovation is a key issue.
The main objective of land consolidation is to improve the economic conditions of remote farmsteads and connect them to the transport network with all-weather roads. A welcome side effect: tourism, cyclists and hikers also benefit from the ‘Black Forest approach’.
In January 2025, the local authority commissioned the family-run company ASAL GmbH, based in the region, to renovate the approx. 800 m paved service road. The local, family-owned company employs over 50 people, combining a wide range of expertise in earthworks and road construction. These also include milling, mixing and homogenising soils, stabilising or improving subsoil (with or without binders) using the mixed-in-place method, the delivery and application of binders, and levelling and compacting the surface.
ASAL has relied on machines from Boppard for many years. Its fleet includes BOMAG single drum rollers, tandem rollers, and, most recently, the new BOMAG RS 300 tractor-towed stabilizer – the perfect machine for breaking up a heavily used service road.
With a carriageway width of 3.6 m, the total renovation area came to almost exactly 3,000 m2. The asphalt surface layer broken up and crushed with the tractor-towed stabilizer was 6 to 8 cm thick. The stabilizer’s point-attack cutting tools penetrated up to 30 cm into the asphalt surface and the underlying substrate. (Thanks to its strong power belts, the BOMAG RS 300 can achieve milling depths of up to 50 cm.) The average working speed was 2 km/h. However, no additional binder was applied or mixed in during the construction of the new base course.
Cold recycling allows bound and unbound surface layers of road pavements to be processed and reused. Cold recycling is particularly resource-efficient. In road construction, this method is a sustainable and cost-effective alternative to complete rehabilitation, which involves removing all pavement layers.
The number of lorry trips to and from the construction site is significantly reduced, saving both time and a lot of money, while also eliminating landfill costs for the disposal of reclaimed material. The German Circular Economy Act stipulates that no material that can be reused on the construction site should be removed from the site.
The combination of tractor and tractor-towed stabilizer often makes sense, especially on smaller road and path construction sites. The large BOMAG RS 300 tractor-towed stabilizer is the perfect addition to fleets of contractors and service providers working in soil stabilisation, subsoil improvement and asphalt recycling, ensuring tractors are fully utilised.
BOMAG’s most powerful model is designed for use with tractors from 300 to 450 hp. When combined with the powerful 390 hp tractor (Fendt Vario 939), the RS 300 tractor-towed stabilizer is ideal for road and path construction – and, thanks to an optional water injection system that feeds directly into the mixing chamber, it can also be used for larger stabilisation and soil improvement projects.
The side plates, including grade shoes, on the BOMAG RS 300 tractor-towed stabilizer are designed to be particularly thick and resistant. Furthermore, the inside of the mixing chamber is fitted with replaceable wear plates. These 18 plates have a Brinell hardness of HB 540. The hood is also made entirely of wear-resistant steel, with a Brinell hardness of HB 400. The large, hydraulically adjustable, high-mounted rear gate allows the crushing and mixing quality to be adjusted steplessly.
Client and owner Frank Asal was particularly impressed by the robustness of the BOMAG tractor-towed stabilizer. At the end of the job, no damage was visible on the rotor or rotor hood. In just 4 hours, 800 m of asphalt surface were broken up and crushed. Powered by the right tractor, the RS 300 achieved outstanding area performance.
Before laying the 30 cm frost protection layer and the 10 cm wearing course, the 800 m new road section still had to be graded. A suitable machine was also available in the ASAL fleet. The final compaction work was also carried out by a BOMAG specialist: a BW 213 D-4 single drum roller.
The sustainability aspect was also underlined during compaction. Thanks to ECOMODE, BOMAG single drum rollers achieve significant fuel savings. In addition, ECOMODE ensures considerably lower noise emissions during operation.
The efficiency and performance of the BOMAG roller were proven in practice, while the BOMAG RS 300 also demonstrated its capabilities. It was one of the first jobs where the large tractor-towed stabilizer from Boppard was used for cold recycling, breaking up and simultaneously crushing an asphalt surface layer.
For Frank Asal, Managing Director of Asal Bauunternehmen GmbH, the next jobs can’t come soon enough. In the Black Forest, many tracks and roads are still in need of repair to keep the valley open for agriculture, livestock farming and tourism, which is equally important in this region.
