Massaging the Mix

Sakai America's new GW750 vibratory rubber-tired roller is perfect for tender mix Superpave applications, stiff HMA mixes and SMA. It develops a new gyratory action that combines the field-proven kneading action of a pneumatic-tired roller with the high forces generated by a vibratory. It develops an equivalent of up to 55,000 pounds of compaction effort in a fast-moving 20,500-pound package.

This new pavement integrator is especially useful for achieving thorough compaction from top to bottom of a typical HMA lift. It takes the top-down compaction of a static roller, the bottom-up compaction of a vibratory and the kneading action of a rubber-tired roller for a totally integrated compaction effort and consistent density from top to bottom of the lift.

The process has proven useful in overcoming the problem of bridging typically found with overlays of profiled pavements where the mix does not seat properly in the grooves, even under vibratory compaction of a steel drum roller. The gyratory action of the GW750 "massages" the mix into these grooves for a much-improved interlock of the new mix with the profiled surface and integrated density of the newly-combined foundation.

Super on Superpave

NAPA/FHWA recommendations for use of conventional pneumatic-tired rollers as intermediate rollers in a Superpave train generally don't work because the pneumatic roller slows up a process that requires speed to succeed.

Sakai has determined that the combination of two Sakai 4000-vpm double-drum vibratories, followed by one GW750, followed by one Sakai R2H-1 balanced three wheeler or an 84-inch-wide double-drum running static is the perfect combination for overcoming any and all tender mix problems, giving the contractor the ability to move fast and make bonuses on incentive-based projects.

The GW750 has also proven effective for moving materials fast on stiffer HMA mixes where a higher percentage of crushed aggregates break down faster under the gyratory action of the new roller. The GW750 is also excellent on SMA mix designs.

Small roller, big results

The GW750 incorporates multi-amplitude eccentric weights in both the front and rear axles. These amplitudes can be set to develop compaction efforts from 20,500 pounds (static) to 55,000 pounds right from the operator station.

Running either statically or with dynamic force, the machine is designed for balanced pli over the width of each tire at both the front and rear axles, which translates to balanced density and excellent smoothness over the rolling width of the machine.

In addition to the excellent traction capabilities of this system, the driven tires eliminate the bow wave build up and hairline cracking typical of non-driven drums or tires. Fourteen inch-wide, super flat tires provide ample coverage and overlap for a smooth surface finish.

The articulated steering system of the GW750 is designed so that the front and rear tires track precisely for even compaction and optimum smoothness over the 77-inch-wide coverage of the machine.

The system offers an outer turning radius of less than 213 inches — ideal for maneuvering around cul-de-sacs, without shoving material due to hydrostatic differential effect. In addition, the dual variable flow motors in the rear of the machine compensate for the speed differential between the outer and inner tires and further eliminate pushing and shoving of the mat.

Dual spray systems located over both the front and rear tires provide both pressurized release agent and pressurized water that will enable the operator to get on the mat quickly and stay on the mat throughout the shift. Like all Sakai spray systems, the GW750 includes ample water reservoirs, convenient back-up pumps and spray nozzles that are quick and easy to clean or replace on the job.

The GW750 is powered by a fuel-efficient 104-hp Isuzu water-cooled diesel engine with a displacement of 264 cubic inches. This engine meets Tier II emission standards. As on all Sakai rollers, ROPS and seat belts are standard.

Braking systems of the new roller include spring-applied, hydraulically released disc brakes actuated hydrostatically via the forward-reverse lever, mechanically via a foot pedal or manually-operated parking lever or via an emergency stop button on the control panel.

Hamm HD 10 and HD 10K Compactors

The HD 10 and HD 10K asphalt compactors feature a 39-inch-wide double drum.

  • HD 12K combination model includes four smooth tires across rear
  • 5,805 pounds of centrifugal force
  • 31.5-hp engines
  • Traveling speed of 6.5 mph

Shannon Chastain BASIC Model 700

The 1 1/2- to 3-ton BASIC Model 700 pneumatic roller features a 7-wheel design that provides more compaction than 9-wheel machines in its class.

  • Hydrostatic drive and power steering
  • 28-hp Kubota diesel engine
  • Wheels oscillate independently

Multiquip V30-4 Roller

Multiquip's V30-4 single-drum vibratory roller features 3,730 pounds of centifugal force.

  • 4,400 vpm
  • 30-inch-wide drum
  • Three engine options: 10-hp Yanmar diesel, 11-hp Robin gasoline engine and 11-hp Honda gasoline engine
  • Customized transport hooks that allow the operator to easily load the unit on the tailgate of a dump truck

MMD PavingPro 270

MMD Equipment offers the PavingPro 270 compact vibratory ride-on roller by Sakai.

  • ProDrive Hubs enclosed within the drums
  • 13-inch curb clearance and zero overhang on both ends
  • ProRide double-drum suspension system
  • 18-hp Honda GX610 easy start engine
  • 50-gallon frame-enclosed water tank
  • 34 percent gradeability
  • All-steel construction

Beuthling Compaction Equipment

Beuthling offers 14 different static and vibratory, rigid frame and articulated models.

  • Models range from 1 to 5 tons
  • B105 static, rigid-frame compactor features a 16-hp twin-cylinder gas engine, hydrostatic internal drum drive, hydraulic power steering and heavy formed drums with non-marking edges

Sakai CV550 Track-Driven Compactor

The CV550 track-driven vibratory soil compactor is able to climb up to 45-degree slopes while compacting.

  • Generates 61,729 pounds of centrifugal force or 917 pounds per linear inch of total applied force over its 84-inch drum
  • 110-inch blade
  • 156-hp Isuzu liquid-cooled, direct-injection diesel engine
  • Combination of hydrostatic, mechanical foot and multiple wet-disc brakes

Ingersoll-Rand DD-158HFA Compactor

The DD-158HFA double-drum compactor features SMART technology, offering eight amplitude settings that are automatically adjusted to the highest frequency for the specified amplitude.

  • Maximum centrifugal force of 44,120 pounds
  • Vibration frequency from 2,500 to 3,400 vpm
  • 33,810-pound operating weight
  • 185-hp Cummins six-cylinder turbocharged diesel engine
  • 59-inch drum diameter with an 84-inch rolling width

Rol-Mol 203/304 Rollers

The Rol-Mol models 203 and 304 rollers are powered by Briggs & Stratton gas engines or Kohler diesel engines.

  • Rolls asphalt slick with no roller marks
  • Full compaction as close as 1 inch to wall or curb
  • Hydrostatic drive in one forward/reverse lever
  • Rear drums 38- to 40-inch-wide
  • Split front steering drums with scrapes
  • Epoxy coated water tank
  • Flo-Jet water pumps and sprayers optional

Wacker RD 27 Series

This 2.5-ton class ride-on roller series includes two models featuring 39.4- (RD 27-100) and 47.2-inch (RD 27-120) drums.

  • Dual vibration frequencies
  • Throttle level controls exciter frequency in each drum, adjusting centrifugal force to the high or low position
  • Ergonomic design with improved visibility and vibration-isolated operator's station
  • Single, hydraulic control lever with built-in vibration control

Bomag BW120AD-4 Roller

The Bomag BW120AD-4 tandem vibratory roller is powered by a 33.7-hp, three-cylinder water-cooled Kubota diesel engine.

  • Operating weight of 5,732 pounds
  • 47.2-inch-wide drums
  • Maximum centrifugal force of 10,125 pounds
  • Choice of two vibration frequencies, 3,300 and 4,200 vpm,
  • Maximum working speed in high frequency is 4 mph

Dynpac CC900G

Dynapac's new CC900G offers an operating weight of 1.5 tons.

  • Air-cooled 20-hp Honda gas engine
  • 50-gallon water tank
  • Maintenance-free steering hitch and steering cylinder
  • Spacious operator's platform with ergonomically positioned step
  • Sliding operator's seat with safety switch
  • Towing eyelet, front and rear
  • Fail-Safe breaks on both drum drives
  • Vibration on front drum
  • Propulsion in both drums
  • Warning lights for brakes and hydraulic oil temperature
  • High clearance adjacent to the edge of the drum on both sides

Ammann AV 16 Double-Drum Roller

The AV 16 double-drum roller is powered by a 20.3-hp water-cooled three-cylinder Yanmar diesel engine.

  • 35.4-inch-wide smooth drums provide up to 3,147 pounds of compactive effort at each end of its 3,747-pound chassis
  • "Full-flush" cantilevered chassis is designed with 2 inches of offset for zero-clearance compaction against obstacles
  • Lifetime-lubricated spherical center joint

Ingram AS315 Roller

Ingram's AS315 static drum roller is powered by a Cummins 4-cylinder diesel engine.

  • 84-inch rolling width
  • Three static steel drums
  • Ballasted weights to 15.5 tons
  • 350 pounds/square inch in compression
  • Standard ROPS
  • Dual operator seats
  • Optional 160-gallon sprinkler system

Caterpillar CB-300 E-Series

The CB-334E and CB-335E asphalt compactors are powered by the 50-hp four-cylinder Caterpillar 3024C Tier II diesel engine.

  • CB-334E double-drum unit has a 51-inch compaction width and an 8,731-pound operating weight
  • 8,092-pound CB-335E combi unit has a 51-inch-wide drum at the front and four smooth tires at the rear
  • Hydrostatic propel system
  • High-frequency vibratory system generates 4,140 vpm

Vibromax W 10 Roller

The Vibromax Model W 10 offers 10 metric ton perimeter frame construction.

  • 3,840 vpm is Superpave capable
  • 68.1-inch-wide drums offer increased area coverage
  • 13-hp water-cooled Deutz turbocharged diesel engine
  • Maintenance-free articulation joint
  • Easy access to engine and hydraulic components
  • Two independent spray systems
  • Two 145-gallon poly water tanks
  • 180-degree swivel operator's platform

Terex TV900 Asphalt Roller

The TV900 asphalt roller features a heavy-duty articulated chassis.

  • 22-hp Kubota engine
  • Optional hydraulic power pack
  • Operator vibration isolation
  • 6-in-1 control lever
  • Anti-vandal protection standard

Stone WolfPac 3100D

The WolfPac 3100 asphalt roller now features a 20-hp water-cooled Kubota diesel engine.

  • Also features a double-drum drive, internal vibration, center point articulation and short wheelbase
  • 3,472-pound impact force (ballasted)
  • 40-gallon reinforced polyethylene water tank
  • Contoured, high-impact, thermoplastic swing-away hood
  • Ergonomically designed operator compartment

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