Road construction contractors must meet increasingly stringent environmental and quality standards in asphalt paving, while remaining competitive.
With InLine Pave and SprayJet, road paver specialist Vögele offers two methods that enable faster and more efficient realization of paving projects with lower overall costs.
Technologies
Project completion deadlines in road construction are tight, especially when they involve the construction or rehabilitation of busy arterial roads. At the same time, contracting authorities demand the very best in paving quality.
Additional pressures arise from stricter environmental requirements and calls for resource-friendly construction methods — while construction contractors struggle with constantly rising material and labor costs.
InLine Pave and SprayJet technologies are designed to counter these problems, according to Vögele. The two paving methods are suitable for a wide range of applications and have a proven track record earned in years of successful use around the globe, according to Vögele.
Binder Course, Surface Layer in Single Pass
The InLine Pave concept is particularly suitable for the construction and rehabilitation of freeways and expressways — as well as wherever roads need to be reopened to traffic again as soon as possible, according to Vögele.
The machines work "in-line", one behind the other, whereby the mobile feeder is loaded with the binder course or surface layer mix and transfers it to the Super 2100-3(i) IP binder course paver.
With its AB 600 TP2 Plus high-compaction screed, this machine is the key component of the paving train: during the paving process, the screed compacts the binder course to values of up to 98 percent, a level that is so high that the surface layer paver can follow on behind it without damaging the freshly-paved binder course.
The paver for the binder course also features a special material transfer module that transports the surface layer material directly into the material hopper of the third machine in the train — a Super 1800 Dash 3 or Dash 5 generation paver — which then paves the surface layer.
Sustainable, High-Quality Asphalt Pavement
"Hot on hot" paving offers a number of advantages: optimal interlocking of the binder course and surface layer increases the quality and service lifetime of the surface layer. It allows a reduction of the proportion of surface layer to binder course material, according to Vögele.
This improves the stability of the pavement thanks to the higher proportion of the stable binder course and prevents deformation. A smaller amount of costly asphalt surface layer material is required. In contrast to conventional paving, there is no need for spraying with bitumen emulsion as a tack coat — this saves material and working time while also reducing CO₂ emissions, according to Vögele.
SprayJet Technology
If the renewal of a surface layer is required, paving thin layers hot over a spray seal is a low-cost, efficient and resource-friendly technology.
With the Super 1800-3(i) SprayJet, Vögele offers a special spray paver that has a track record on projects around the globe, according to Vögele. It sprays bitumen emulsion onto the old pavement and paves the new surface layer over it in a single pass.
The five spray bars with a total of 24 nozzles enable seamless application of the bitumen emulsion over varying paving widths of up to 20 ft. As the SprayJet module is a self-contained functional unit, it also allows the use of the Super 1800-3(i) SprayJet in the role of a classic road paver. The module is easy to maintain and is logically integrated in the Vögele ErgoPlus 3 operating concept, according to Vögele.
Higher Paving Speed, Quality
SprayJet technology is efficient and is suitable for all paved surfaces used by traffic. The paving speed is often significantly higher than in conventional paving scenarios and, as the layer thickness is generally .78 in. rather than the usual 1.57 in., this also means potential savings of up to 50 percent of the surface layer material otherwise required, according to Vögele.
The use of the SprayJet method also brings numerous benefits with regard to quality. As spraying the emulsion and paving the surface layer take place in a single pass, the binding agent film cannot be inadvertently driven over and damaged by other construction vehicles, according to Vögele.
The binding agent film seals the entire lower layer and provides an effective barrier against water. This further increases the service life of the road, according to Vögele.
Two Methods for All Paving Requirements
Whether for rehabilitation, construction from new, or inner-city construction projects, with In-Line Pave and SprayJet, Vögele offers two technologies that take both the challenges faced by road construction contractors and their clients' specific requirements into account. Faster, more efficient and more sustainable road construction or rehabilitation; the use of less material and conservation of resources; and the realization of high-quality asphalt pavement surfaces, according to Vögele.
