This month’s issue focuses on the beginning of quality control with good practices for the lab and mix design.
Once you have a good mix, you’ve got to place and compact it with best practices as well. One of the compacting techniques that the experts at Hamm, a Wirtgen Group Company, of Nashville, Tennessee, shared is that of oscillation technology. The OEM stated that its research and development team pioneered the development of oscillation compaction in the 1980s.
Here’s its description of the oscillation principle, and how it differs from vibration: “With vibration, a single unbalanced shaft generates the upward and downward movement of the drum, causing it to strike the ground at a rapid rate. In oscillation drums, on the other hand, two unbalanced shafts rotate synchronously, driven by a toothed belt. The unbalances are offset by 180° relative to one another. As a result, the drum performs a rapidly alternating forward/backward rotary movement.
“Due to this movement, the drum directs the compaction force into the substrate tangentially to the front and rear in the form of shear forces. Here, unlike with vibrating drums, the compaction force acts continuously on the substrate because the drum is in contact with the ground at all times. This is why oscillation rollers compact dynamically as well as statically with their intrinsic weight the whole time.”
Along with compaction equipment, OEMs have a variety of machines on offer to assist contractors with quality asphalt paving and pavement maintenance projects. Those responding to our request for information follow on the next few pages of this month’s paving product gallery. We’ll share the latest in production equipment and components next month.
Ammann’s proprietary ACEecon compaction measurement system is now available as an option on Ammann APR 4920 and APR 5920 Reversible Vibratory Plates.APR 4920 and APR 5920 are the two largest models of reversible vibratory plates that use a centrifugal clutch for their power transfer from engine to exciter. With the addition of ACEecon compaction system, Ammann extends its range of intelligent vibratory plates with two new machines. ACEecon helps operators monitor compaction progress via an intuitive LED display. The information it provides is designed to prevent operators from overcompacting areas where targets have already been met.
ACEecon uses technology similar to other Ammann Compaction Expert (ACE) products developed for larger Ammann machines, including soil and asphalt compactors. ACEecon is already available on Ammann APH Hydrostatic Vibratory Plates.
For more information, contact Steve McCown at (904) 543-1691 or email@example.com.
BOMAG Americas, Ridgeway, South Carolina, has released the RS500 reclaimer with FLEXMIX. The extra breaker bar assemblies and an additional variable-position mixing door within the rotor chamber of reclaimer/stabilizer are designed to allow contractors to achieve consistent and controllable gradation with a simple toggle switch. The optional FLEXMIX, adjustable door is located above the rear discharge door to provide flexible mixing of material inside the rotor chamber.
For more information, contact Tim Hoover at (660) 580-0350 or firstname.lastname@example.org.
CASE Construction Equipment of Racine, Wisconsin, has introduced two double drum asphalt rollers—the DV209D and DV210D. The new vibratory asphalt rollers offer a balanced drum design and a variety of standard features, including automatic vibration control, crab steering, an oscillating articulated roller joint and a pressurized, triple-filtration water system. An available high-frequency option allows for frequencies up to 4,020 vpm. A combination option is also available for both models, featuring a vibratory front roller and rear pneumatic tires.
With operating weights of 21,080 and 22,930 pounds, respectively, the DV209D and DV210D are designed for municipal roads, parking lots and residential developments, as well as more large-scale paving applications such as highways, airports and industrial areas. The new models feature a Tier 4 Final 100 HP Deutz engine.An articulated roller joint oscillates + /- 6 degrees to maintain reliable drum-to-ground contact, and a standard crab steer design hydraulically offsets the rear drum up to 6.7 inches for precision work. An optional compaction meter monitors material densities in real time so the operator can achieve precise densities without over-compacting. GPS mapping is also available.
The DV209D and DV210D feature a spacious, comfortable and intuitive operator environment with an adjustable sliding/rotating seat that provides excellent visibility of the drum surfaces, edges and spray bars. The operator station also features a tilting and adjustable-height steering column and adjustable armrests with integrated control switches. A multifunctional display mounted on the steering wheel provides the operator real-time operation data, precision controls and diagnostics.
For more information, visit CaseCE.com.
Caterpillar expanded the Cat® RP Series portable generators line with the introduction in May of the RP12000 E in the United States and Canada. The new generator fills out the top of the series, delivering 12kW of running power and new features. The generators are now available in the United States and Canada via over 550 Cat Home & Outdoor Power sales locations, which include regional and local retailers, traditional Cat dealers and online retailers. Like other products in the series, the RP12000 E was designed by Caterpillar engineering teams based in Illinois and the United Kingdom. The team focused on power output, ease of use, run-time, low noise and other features:
- 670cc V-Twin engine
- All-copper generator
- Low-idle mode option
- 9 receptacles including a 50A 240V outlet
- Removable lifting eye and handle
- Balanced center of gravity
For more information, visit here.
FMCG Corp., Los Angeles, created the MagnetPal in 2013, but it recently received attention from DIY Network’s “I Want That” department at the 2017 National Hardware Show. Around the work zone or at home, the patented, military grade, 1-inch magnet is designed to lift up to 14 pounds. “In a lab environment, the tiny MagnetPAL can lift 14 pounds. We refrain from pushing this number as a consumer could try to lift an odd-shaped 14-pound object that does not balance, and they harm themselves.”
It uses rare earth elements such as Neodymium encased in strong ABS plastic. A spokesperson for the company told AsphaltPro, “It is generally safe around electronics. We have not had any complaints of lost data or electronic problems.”
For more information, visit your local hardware store.
The next generation of the HD+ series tandem rollers from Hamm, a Wirtgen Group Company, features Easy Drive and Tier 4 engines. Easy Drive’s principal components are the clearly arranged instrument panel with steering wheel and a multifunctional armrest with joystick and push-button switches. The Easy Drive system also includes a fully adjustable seat. Another feature of Easy Drive is its operating structure. A steering wheel is used for steering, but all other important functions are operated via the joystick and the multifunction armrest. Here, the driver is able to see all the keys on the joystick. The operating elements are arranged around the joystick in such a way that the more frequently an element is used, the closer its position. Operation is designed to be language-neutral. Hamm uses color coding to achieve unambiguous assignment of the elements and a clear overview. The Easy Drive operating concept has already won numerous internationally recognized design awards.
Hamm also has something new to offer in the area of articulated tandem rollers, as all models in the HD+ series are now available with Tier 4 engines. In addition, all models with a drum width of 66 inches or greater come with the Easy Drive operating concept as standard.
For more information, contact Brodie Hutchins at (615) 501-0600 or Brodie.email@example.com.
If you’re looking for bucket options in the work zone, your skid steer has 30 new ones from John Deere of Moline, Illinois. The OEM debuted its enhanced production series buckets for the 744K-II, 824K-II and 844K-III wheel loader models in May of this year. The buckets offer several new features, including an improved bucket profile, integrated narrow spill guards, bushed static bucket pin joints and optional wear plating.
John Chesterman, the product marketing manager for the production class four-wheel drive loaders of John Deere Construction & Forestry explained the changes: “In speaking with wheel loader users in the field, they drove home the fact they wanted a bucket option that would increase production and offer greater efficiency in material retention. We worked with our engineers to develop 30 configurations that improve loading and visibility; are easier and quicker to repair; and extend bucket life in all types of material.”
When updating bucket design, John Deere added curved profile side cutters that are designed to improve material retention and allow for better bucket fill of loose material. Integrated narrow spill guards are designed to provide better visibility to the load so the operator can see when the bucket is full. This helps reduce loading time, fuel consumption and number of loads on the machine, and protects wheel loader linkage. The enhanced production series buckets also feature bushed static bucket pin joints, which is a popular feature on the current 844K and 944K wheel loaders, according to the manufacturer. These pin joints reduce the need for welding and align boring for repair, enable repair in the field and reduce maintenance time overall. John Deere is also offering improved, optional wear plates to extend bucket life. (Non-wear plate buckets are available with external cheek plates only for working with non-abrasive materials.) Wear plate buckets include external and internal cheek plates and wear liners on the floor.
For more information, visit www.JohnDeere.com.
In the second quarter of 2017, LeeBoy of Lincolnton, North Carolina, launched its 8520 Asphalt Paver. With variable paving widths up to 15 feet, it is built for the heavy-commercial paving market with heavy-duty undercarriage and track system, and these features:
- 106-hp Kubota T4F engine
- Choice of high deck or low deck configuration
- Dual electronic steering and sliding operator control station
- Pressure ports for diagnostics and testing
- HD Legend screed system with electric heat
For more information, contact your local LeeBoy dealer.
The Roadtec CIR Additive System is used in the cold-in-place recycling of asphalt pavement in the repair and rehabilitation of asphalt-paved roads. The system is used to transfer, measure, and inject either emulsion or foamed asphalt to the cutter housing of the milling machine. The additive is then blended with the milled material and transferred for paving.
Roadtec CIR equipment is designed to repair damage to a roadway in one single pass, while reusing up to 100 percent of the existing material. The CIR process removes a portion of an existing asphalt pavement by milling to a depth of two to four inches, and then repaving it with reworked asphalt mix with additives. As the name implies, CIR is accomplished without heating the asphalt mixture, before or after placement. Depending on the structural requirements of the overall pavement and its intended use, the CIR typically receives a wear course such as a chip seal or HMA overlay to complete the road before returning it to traffic. Single unit systems do not include a method of screening and crushing.
Mounted to the rear of the milling machine, the CIR Additive System is the same width as the mainframe of the milling machine.
For more information, contact Eric Baker at (423) 265-0600 or firstname.lastname@example.org.
The SW654ND that Sakai launched at the 2017 CONEXPO-CON/AGG Conference in March offers an oscillatory tandem drum roller in a 58-inch drum width. The SW654 tandem roller’s fuel efficiency is based on a 3.3 L Kubota, Tier 4 engine coupled with Sakai’s new ECO Compaction Mode (ECM), which the manufacturer states can reduce fuel consumption up to 37 percent.
- Side clearance 2.5 inches
- Curb clearance of 28 inches
- Maximum operating weight (with ROPS) is 16,250 pounds
- Front axle load is 7,740 pounds
- Rear axle weight is 8,510 pounds
The SW654ND is available with Sakai’s unique “ND” configuration. ND-series asphalt rollers have independent dual drum vibration or oscillation capability from twin eccentric shafts. Amplitude and frequency for the ND version of the SW654ND are 0.021 inches (0.52 mm) at 2,940 vpm. “While vibration is still used on the overwhelming majority of compaction jobs to achieve density,” a spokesperson for the company said, “we are seeing more and more jobs spec’d as ‘no-vibe’ – meaning that you cannot engage your vibration.”
Sakai’s unique ND configuration, he said, increases versatility by giving paving contractors a choice between up-and-down vibratory action and the gentler forward-and-back action of an oscillating roller on both drums. The selection can be made with a flip of a switch on the operator’s console for seamless transitions from the vibratory to no-vibe sections of a job.
For more information, visit www.sakaiamerica.com.
Titan™ of Minneapolis expanded its PowrLiner™ series of line stripers in May with the introduction of the PowrLiner 3500 featuring PermaStroke Technology™ with no piston, packings or clutch. The striper is backed by Titan’s lifetime WearGuard® Elite™ fluid pump warranty. The PermaStroke Technology is engineered to deliver consistent pressure from 300 to 3,300 PSI.
Maintenance is minimal with only two wear parts—the inlet and outlet valves. The PowrLiner 3500 also simplifies the cleaning process by holding less paint in its system. It features a FlatLine Pulsation Dampener to eliminate fluctuations and deadband in the system. In addition, the Sureflo™ pusher valve is designed to guarantee the sprayer primes every time it’s started. It is powered by a Honda® engine. It comes standard with a Titan RX-80 gun, TR line striping tip and 50-foot hose. The cart is built with a swing-back design and two tip holders.
For more information, visit www.titantool.com.
The new Super 1700 3i and Super 1700-3i and Super 1703-3i from Vogele, a Wirtgen Group company, Antioch, Tennessee, are 8-foot pavers that combine the paver and screed in a single system with the front-mounted VF 500 extending screed. With the ErgoPlus 3 screed console, the screed can be adjusted for infinite variability in a range from 8 feet to 15 feet, 6 inches; or with bolt-on extensions to 19 feet, 6 inches.
The entire material handling system of the Super 1700-31 and Super 1703-3i is designed for high output, starting with a receiving hopper with a capacity of 14.3 tons. The high-powered, separate hydraulic drives on the conveyor and auger support laydown rates of up to 770 tons per hour.
- Liquid-cooled, 4-cylinder Cummins diesel engine
- Engine output of 173 hp at 2,000 rpm
- Hardtop with extendable sunshade and comfort seats that swing out
For more information, contact Brodie Hutchins at (615) 501-8105 or Brodie.email@example.com.
Born from the Blaw-Knox legacy, the P4410B is the latest addition to the B-Series lineup of tracked pavers from Volvo Construction Equipment. It features an Ultimat®16 front-mount screed.“The P4410B is designed to be the most utilized paver in any fleet,” said John Mooney, product manager at Volvo Construction Equipment. “Whether the job is light highway or heavy commercial, the paver’s unique size, combined with its powerful engine, front-extending screed and ease of use make this machine a utility tool for any paving contractor. Adding to its versatility is the ability to install most auto-grade and slope systems.”
With a 98-inch transport width and an overall length of 17 feet, 10 inches, the P4410B can be easily transported along with a small asphalt compactor. Once on site, the Ultimat 16 screed can hydraulically extend to double the machine’s base width to a full 16 feet. Add additional extensions for an 18-foot paving width.
Dual screed consoles and remote controls are placed with ergonomics at top of mind. The P4410B is packed with features typically associated with larger 10-foot machines. Common controls with other Volvo pavers are designed to put the paving crew at ease upon first use. The machine also features large 20-inch foldable walkways, plentiful handrails, non-slip footing and glare-resistant hood paint for uncompromising safety and ease of movement around the platform. The 60-inch low deck and 360-degree visibility around the paver, hopper, auger channel and screed enable the operator to check material flow at a glance.
Large opening panels offer easy access to daily checkpoints and filters, while strategically placed hydraulic test ports keep machine downtime to a minimum. Combined with the clean hose and harness routing, the practical design of the paver provides reliability and durability, according to the manufacturer. Maintenance-free auger and conveyor bearings eliminate daily and weekly greasing. Features such as uncomplicated hydraulics, long-lasting wear plates, simple drive chains, straightforward solenoid controls and the clutch-free design promote high machine uptime and keep repair costs low. With reliable Tier 4 Final engine technology, the operation can benefit from longer 500-hour regen intervals.
- Engine = Deutz TCD 4.1 L Tier 4 F
- Rated engine power = 155 hp
- Ultimat 16 weight = 6,500 pounds
- Max paving width = 18 feet
- Paving depth = 0.25 – 10 in
- Paving speed = 0-242 fpm
For more information, visit volvoce.com/na.