How many roller in 1 ton AC

Manoeuvrable small compressors

You can find a complete overview of the vibration rollers on the market with an operating weight of up to approx. 4 t on the Internet at www.tis.de.

This group of machines is indispensable for road repair work, on narrow construction sites and as a supplement to heavy roller groups for large-area compaction work. The light tandem rollers with articulated steering are very manoeuvrable. They have the same equipment options as the heavy rollers and can be used in a variety of ways with or without vibration, as a combination or rubber-tyred roller. The current market offer is correspondingly large.

Duplex rollers are preferred for the construction and repair of sidewalks, verges, cycle paths, courtyard and garage entrances, playgrounds as well as farm and forest roads. Due to their hand-operated steering, the operating weights are less than a ton. The designs, which have been developed over decades, enable these robust and light double vibratory rollers to be operated virtually maintenance-free, an advantage especially in the rental business with sometimes improper handling of the machines.

Lightweight vibratory standem, combination and rubber-tyred rollers in the 1 t to 4 t weight class are particularly valued for their maneuverability. For applications with lateral boundaries, the rollers have non-sided drums and track offset so that they can compact right up to the boundaries. This eliminates the need for costly manual rework. Combination rollers with vibrating front drum and rubber wheels on the rear axle achieve excellent sealing of the asphalt surface and are particularly useful on asphalt mixtures that are sensitive to sliding and for rolling work on inclines.

Ammann Verdichtung GmbH in Hennef supplies eight tandem and combination rollers in the weight class from 1.5 t to 3.9 t and the 700 kg hand-operated duplex roller AR 65 on lightweight rollers. With the fully hydraulic drive and vibration drive for both drums, the Approach the AR 65 without jerks and brake. With two selectable frequency settings of 60 Hz or 55 Hz and correspondingly different vibration amplitudes of the drums, earthworks and substructure work can be carried out effectively with the large amplitude (at 55 Hz) and the compaction of thin asphalt layers with the smaller amplitude (at 60 Hz). The side-free bandages with a diameter of 40 cm and a width of 65 cm work right up to the roadside, curbs, walls or other obstacles. You can choose between a 5.1 kW or 6.1 kW Hatz motor with an electric starter and an additional manual starter as standard.

In the tandem roller compact class with operating weights from 1.5 t to 1.8 t, Bomag offers three models BW 80/90/100 working widths of 0.8 / 0.9 / 1.0 m -Zyl.-Kubota-Motor supplies the hydrostatic drive of both drums and the vibration excitation. The vibration of the rear drum can be switched off. In addition, the vibration switches off if the vehicle is traveling at too high a speed of over 5 km / h in order to avoid traces in the asphalt surface. The rollers are equipped with a corrosion-free fall sprinkler system as standard. Pressure sprinkling, which switches off automatically when the roller comes to a standstill, is optionally available. For special operations, such as B. When working frequently near side boundaries, Bomag recommends the BW 80 ADS. The rear conical bandages of this roller enable efficient compaction right up to the walls without damaging them. This eliminates the need for reworking with hand-held devices. The rollers can optionally be supplied with a side-free conical pressure roller, cutting wheel and 45 ° roller. The BW 90 AC-2 combination roller with four rubber wheels on the rear axle is used for sealing asphalt surfaces and for rolling work on inclines. To facilitate transport, the rollers can be loaded either with a single-point suspension or with a loading gear.

With working widths of 1.0 m or 1.2 m, the compact tandem rollers BW 100 AD-4, BW 120 AD-4 and BW-125 AD-4 are designed as all-round rollers for small to medium-sized road construction projects. The working weights of the three models are 2.4 t, 2.6 t and 3.2 t. The combination rollers BW 100 AC-4, BW 120 AC-4 and BW 125 AC-4 are considered as asphalt experts. They ensure a perfect surface sealing of the road surface. The vibration excitation system with two frequency settings of 60/70 Hz (BW 100 and BW 120) and 50/60 Hz (BW 125) enables the efficient compaction of thin layers at increased speed.

With the introduction of compact asphalt technology in road construction, the associated compaction process was optimized. Depending on the measure, three to four groups of rollers are used. In the first step after the paver, the binder and surface courses are statically pressed on. The main compaction, including any necessary grit spreading process, is then carried out by tandem vibratory rollers. The compaction work is then completed with static recompaction. In practice, there was a demand for a light roller with a high area coverage for the first compaction phase. At the same time, a very sensitive driving operation with good rolling behavior of the drums should be guaranteed in order to avoid unevenness due to material shifting. The static line load should be less than 13 kg / cm. With these parameters, a gentle adaptation of the lower degree of pre-compaction of the surface course to the high degree of pre-compaction of the binder can be achieved - without risk to the evenness. The Dynapac CC 142 tandem vibratory roller with an operating weight of 3900 kg and a drum width of 130 cm provided the ideal prerequisites for converting to a static roller without vibration and a drum width of 160 cm. The drums without vibration exciter are only designed for static use. With its large area coverage, the lightweight static CC 142 follows the asphalt paver.

All Dynapac compact asphalt trains now work with a duo of these wide rollers. However, customers also have the option of converting the static CC 142 rollers to tandem vibratory rollers if necessary.

Hamm is now expanding the Compactline series with the HD 14 TT rubber-tyred roller. The 3.4 t heavy roller has a wheel load of 540 kg each for the three front tires and 445 kg each for the four rear tires. The operating weight of 3.4 t can be increased to 4.3 t. The maximum working width of the roller is 1.27 m. With the stepless hydrostatic drive of the front and rear wheels, speeds of up to 11.9 km / h can be achieved in both directions. The water sprinkler with pressure pump and 290 l water tank works at intervals or can be operated manually. The waisted front end gives the driver an optimal view of the wheel edges to the front. Furthermore, a low machine height, the ability to drive in crab steering and the 3-point articulated joint characterize the new HD 14 TT pneumatic tire roller.

Vibromax compaction machines are among the first to be used for soil and asphalt compaction by introducing vibration energy. The traditional brand Vibromax has been expanding the JCB construction machinery program since 2005. With the VMD 62/80/120 series, three working widths of 60/65/75 cm are available for hand-held double vibration rollers. For work on asphalt, all models are equipped with a robust stainless steel tank for sprinkling the drums with water. Both drums and the vibration exciter are hydrostatically driven. The exciter shaft bearings run in an oil bath and are therefore designed for a long service life. At a vibration frequency of 55 Hz, the vibration generates a centrifugal force of 16 kN for the 600 kg VMD 62 and 20 kN or 40 kN for the VMD 80 (800 kg) and VMD 120 (1135 kg) roller. The VMD 62 and VMD 80 can optionally be supplied with an electric starter and impact protection. The VMD rollers are suitable for compacting sandy, slightly cohesive soils as well as for compacting asphalt.

The small tandem vibration roller RD 16-90, which has been included in the Wacker Neuson compaction machine program since the last Bauma, is now equipped as model RD 16-100 with 1.0 m wide drums instead of the 0.9 m wide drums of the RD 16-90. The 1.52 t heavy machine is used for the compaction of asphalt for level base and surface courses as well as for coarse-grained base courses in confined spaces. The easy-to-maneuver roller enables compaction to the edge.

The optional vibration excitation with 70 Hz frequency for one or both drums as well as the all drum drive are supplied by the 16.8 kW water-cooled 3-cylinder Lombardini diesel engine. The water consumption of the pressure sprinkler system can be regulated using a time interval switch with 8 settings. The design of the machine with its laterally sloping hood, standard work lights and the high seating position for the driver creates good visibility on all sides and thus facilitates handling of the roller. The infinitely adjustable driving speed extends forwards and backwards up to 9.3 km / h.

With the DVH series, Weber supplies three models of duplex rollers with hydrostatic drive. The DVH-550/600/655 rollers of this series with operating weights of 365 kg, 420 kg and 732 kg are equipped with tried and tested details such as height-adjustable guide rod, central suspension, large-volume water tank and standard electric starter (DVH 655 E). In Weber rollers, the drive motors are generally arranged at the front of the roller, on the one hand to be easily accessible and on the other hand to keep the noise impact on the operator low. With the rapid traverse, the duplex rollers can be quickly moved on the construction site.

Would you like to find out more about small vibratory rollers with an operating weight of up to 4 t? Then read our complete market overview on this topic online at www.tis.de.

Dr.-Ing. Richard Sonnenberg, Kaarst