Equipment spotlight: Paving and compaction

A look at some of the latest technologies for paving and compaction applications.
Rock to Road Staff
September 21, 2018
By Rock to Road Staff
Rock to Road checks out some of the latest technologies for paving and compaction applications.

Roadtec’s SP-100e Stealth paver is a simply designed, low maintenance, 10-ft. gravity-fed paver. The SP-100 provides consistent results, easy maintenance, and increased comfort, all while decreasing costs. The innovative design of the SP-100 Stealth contributes to its low cost of ownership. Designed specifically to work in tandem with the Roadtec Shuttle Buggy material transfer vehicle, the SP-100 harnesses gravity to feed material directly to the auger from the mass flow hopper, replacing the need for slat conveyors, hopper wings, and push rollers. Features of the SP-100 include: the industry’s only gravity-fed paver; the material fed steadily and dispensed evenly, resulting in improved mat density and consistent smoothness; it uses 25 per cent less fuel and reduces annual costs of ownership by 20 per cent compared to conventional pavers; maintenance and inspection areas easily accessed from doors on sides or top of the paver; revolutionary air curtain directs fumes and heat away from operator platform; and the platform swing out stations provide clear and wide sight lines.

Volvo CE
The new SD115B soil compactor from Volvo Construction Equipment helps the operator achieve as high a level of performance and efficiency as possible, whatever the demands of the job. Volvo’s advanced drum control system allows the operator to adjust the frequency and amplitude, compensating for changing soil types and conditions. Two frequency settings come as standard but five can be included as an option. High or low amplitude can be selected to adjust the drum’s dynamic force based on the job and material depth. Meanwhile, the optimized centrifugal force and auto-vibration feature also improve performance, ease of operation and productivity. The traction system provides excellent climbing and traction capabilities in difficult applications, such as steep inclines or slippery surfaces, preventing wheel or drum spin for excellent gradeability, performance and productivity. The new compactor can be set up in three different configurations and is available with a smooth or padfoot drum. The compactor can also be quickly and easily converted from a smooth drum by clamping on a padfoot shell. The premium Stage IV-compliant Volvo engine delivers high torque at low rpm for lower emissions and decreased fuel consumption without compromising on power. Eco mode now comes as standard on the SD115B and can achieve up to a 40-per-cent reduction in fuel consumption by matching engine speed to operation mode. Furthermore, the new eccentric design provides quicker ramp-up speeds at lower pressure also for increased fuel efficiency.

The highway class Bomag BW206AD-5 tandem vibratory roller boasts a 55.1-in. (1,400-mm) drum diameter to put more impact surface area in contact with the asphalt to help prevent mat pushing and shoving, improving mat smoothness. The roller’s unique leg design reduces overall machine length, allowing for easier rolling in confined areas. Available crab steering offsets the front and rear drums by up to 6.7 in. (170 mm), allowing the BW206AD-5 to easily compact right up to structures. The unit offers two vibration frequencies and amplitudes, increasing flexibility in matching compaction output to the application. It can be economically equipped with Bomag’s exclusive Economizer compaction measurement system that delivers real-time compaction progress to the operator’s console.

With the HD+ 90i PH (power hybrid) tandem roller, Hamm is combining a conventional internal combustion engine with a hydraulic accumulator – the diesel engine covers the base load while the hydraulic accumulator meets peak loads. The underlying concept is based on the realization that although the maximum load is called for regularly while compacting, it is always just for a few seconds at a time. This typically occurs when starting up or activating the vibration or oscillation, for example. All other compaction tasks call for significantly less power. The hydraulic system works rather like a pumped storage power station – as soon as the power demand falls below the maximum load of the internal combustion engine, a pump fills the hydraulic accumulator. If a lot of power is called for, the hydraulic system functions as an auxiliary drive, able to supply a maximum short-term load of up to 20 kW. Following this, the cycle begins afresh with the refilling of the accumulator.

This technology allows the roller to deliver the same power while equipped with a smaller diesel engine. Two other components of the HD+ 90i PH also help to ease the load on the diesel engine: an efficiency-optimised electric fan drive and an efficient start-stop system. This means that for the HD+ 90i PH, a 55.4 kW output engine suffices – instead of the 85 kW unit in the conventional version.

The number of standard variants of the HD+ 90i PH power hybrid roller offered by HAMM has by now grown to six; with double vibration (VV), double vibration with split drum (VV-S), one oscillation and one vibrating drum (VO), one oscillation and one split vibrating drum (VO-S), as a combi roller (VT) and as a combi roller with split vibrating drum (VT-S).

With these new 10-ft. Highway Class pavers, Vögele also offers the right screed for every application. The Super 2000-3i and the Super 2003-3i can be combined with the VF 600, a screed with front-mounted extensions, as well as the VR 600 and AB 600, two screeds with rear-mounted extensions. The AB 600 extending screed is equipped with both a vibration system and tamper, meaning it can achieve higher compaction. It’s ideal for placing recycled materials as well as roller-compacted concrete (RCC). The driving force behind the two new Vögele Highway Class pavers is their powerful, six-cylinder Cummins diesel engine, rated at 250 hp (186 kW). Both low fuel consumption and low-noise operation are made possible by intelligent engine management with an ECO mode. ErgoPlus 3, the latest version of the Vögele operating system, has been enhanced with a number of new ergonomic and functional features. With its new mounting system, for example, the paver operator console can now be shifted conveniently and easily between the right and left sides of the operator stand during operation. In addition, it has a large colour display that ensures good readability even in poor lighting conditions. The screed consoles have been completely redesigned, making operation of these new Dash 3 machines even easier for the entire paving crew.

Carlson Paving Products
Carlson Paving Products recently announced the full production of its newest platform: the EZR208. The 8-ft. EZR2 completes the manufacturer’s lineup of rear-mount highway-class screeds available for all current North American paver models. Featuring a standard paving width of 8 ft. to 15 ft. 6 in. and weighing 7,800 lb., the EZR208 achieves superb mat quality and ride uniformity with its class-leading 20-inch deep, single-piece screed plates. Providing more screeding surface area than competitive screeds, the EZR2’s screed plates not only achieve higher mat quality but also produce longer component lifecycle. The EZR2’s screed plates are paired with state-of-the-art heating elements held in place by full length hold downs, providing even, efficient heat transfer to the upper surface of the plate. The EZR208 is engineered with Carlson’s exclusive extension support system that provides unequalled strength even at 22 ft. with bolt-ons. The EZR208 features Carlson’s exclusive extension support system with a high strength tubular frame to which the chrome rods are firmly fixed to. This means the chrome rods only act for fluid inboard and outboard motion, while the high strength frame provides leading extension rigidity and elimination of flex at wide widths.

Featuring deep telescoping walkways, the EZR208 creates a safer operating platform while the low profile extensions provide leading line of sight to the paver’s augers and head of material.

Caterpillar Inc. recently announced the addition of the new production-class Tandem Vibratory Rollers to its paving products family. The new models are the CB13, CB15, and CB16. New nomenclature corresponds to 13-ton, 15-ton, and 16-ton weight classes. These models can be equipped with an oscillatory vibration system for excellent application versatility, and offer refinements to the operator controls, water spray system, service access, and lighting packages.

Many technological enhancements are provided through the Cat Compaction Control option. Pass-count and temperature mapping systems combine infrared temperature sensors with GPS mapping to keep the operator informed of current mat temperatures, machine position, pass-count and pass coverage. This intuitive system greatly enhances nighttime rolling pattern performance, and records information for future process analysis and quality control documentation. When combined with drum edge and drum surface lighting, Cat Compaction Control helps extend the workday and increase daily production by optimizing jobsite awareness in low-light conditions. Machine-to-machine communication is another technological enhancement that improves job site efficiency. The system helps keep rolling patterns in sync by sharing mapped data such as CMV, temperature mapping, coverage area, and pass-count maps between the displays of multiple machines. The Cat C4.4 engine rated at 106 kW (142 hp) comes standard with Eco-mode and automatic speed control, leading to uniform compaction, fuel savings, and reduced sound levels to both operators and surrounding job site personnel.

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