Single drum roller

ALL IN ONE COMPACTION

SINGLE DRUM VIBRATORY ROLLERS ARE AN ESSENTIAL PIECE OF EQUIPMENT FOR ROAD CONSTRUCTION. TUTT BRYANT ARE NOW OFFERING THE BOMAG BW 213 BCV5 ROLLER, CAPABLE OF VARYING VIBRATION LEVELS FOR AN ARRAY OF PROJECTS.

As single drum rollers prepare the soil for the application of asphalt, they play a crucial part in road construction projects.

However, depending on the location for construction, the method to compact material changes due to vibration requirements. Towns and populated areas therefore often present increased risks for vibratory compaction compared to rural locations due to surrounding infrastructure.

The fifth generation of BOMAG single drum rollers feature different weight classes, and vibration levels to suit a wide range of compaction requirements.

As the primary distributor of BOMAG equipment in Australia, Tutt Bryant are releasing the BOMAG BW 213 BCV-5, which it believes will change the way equipment hirers choose rollers for projects.

BOMAG National Business Development Manager, John Glossat says one significant feature of the new BOMAG BW 213 BCV-5 is its ability to adjust the amplitude manually or automatically depending on the job.

This enables operators to achieve flexibility by using the machine in a variety of different compaction environments.

“The vibration can be increased when working with typically tough soil to compact, or it can be reduced when working in residential areas where increased vibration may pose a risk to the surrounding utilities or buildings,” Mr. Glossat says.

The BW 213 BVC-5 is a single drum roller suitable for compaction of a wide range of earthwork materials and helps operators to transit maximum energy on each application to ensure productivity.

Mr. Glossat says in the equipment hire business the availability of the right piece of equipment at the right time is crucial. To ensure Tutt Bryant has a high standard of customer service, it prides itself in the availability of this equipment for its customers.

“For the single drum rollers in the hire market in Australia, the models we have found to be most in demand are in the 13, 16 and 19-tonne weight class. These can be working on anything from roadbase construction to general bulk earthworks,” he says.

There are three new BOMAG single drum vibratory rollers and when comparing the specifications between the three, Mr. Glossat says it’s clear the BW 213 BCV-5 is punching above its weight class.

“It is able to do the same job as the 16-tonne weight class and also comparatively the 19-tonne class depending on the material type,” he says.

“The ability for the BW 213 BVC-5 to adjust its amplitude makes it well suited to an even larger range of projects and then its high centrifugal force acts as another proponent to increase compaction quality.”

The manual feature of the roller means the operator can switch to an oscillation mode with the touch of a button. On automatic mode it can compact to a target E-VIB value ensuring uniform compaction across the whole project.

All BOMAG BVC models come equipped with the TERRAMETER measurement system that continuously calculates the dynamic soil stiffness as a vibration modulus E-VIB [MN/m2].

This measuring technology allows single drum rollers to become rolling pressure plates, calculating the surface area coverage in real time.

The E-VIB values are computed based on the compression paths of contact forces versus the drum displacement curves. The E-VIB values grow with an increase in roller passes.

This is presented as a line diagram on the machine’s integrated display through

the instrument panel. A printout of the compaction pass can also be obtained from a printer on the dashboard with all parametres documented.

“Essentially this means the roller is smart enough to calculate when the desired compaction is achieved and will notify the operator,” Mr. Glossat says.

“Once the target value is achieved, the exciter adjusts the amplitude position automatically to suit the current soil condition, giving the operator optimum compaction results.”

The machine also features BOMAG VARIOCONTROL, a new technology developed by the original equipment manufacturer which causes the drum to vibrate in a linear trajectory instead of a circular path.

The VARIOCONTROL technology is smart and adjusts the amplitude to the ground conditions. The direction ranges from horizontal oscillation for highly sensitive compaction of surfaces in oscillation mode, to vertical oscillation for maximum depth effect.

“This means the roller can easily work on compaction jobs on bridge decks or close to buildings and sensitive installations such as heritage or conservation areas,” Mr. Glossat says.

The system is operated using a rotary switch in the operator cabin. The driver can set the required target E-VIB value for compaction and the system will automatically control this throughout the job.

During works, the VARIOCONTROL system will indicate when compaction has been achieved and no further passes are required. This helps to prevent overcompaction of the soil.

The BW 213 BVC-5’s exciter system is able to generate vibration with directed oscillation. This is due to the fact the exciter system consists of counter-rotating eccentric weights.

As a result of the counter rotation, the centrifugal forces overlap and the compaction force is produced on a single plane. This can create directed vibration, which can be changed by slewing the complete exciter unit.

“The drum is able to vibrate in a vertical or horizontal direction, or any angle in between. This change in vibration direction is equivalent to a change in the vertical amplitude and therefore to the compaction energy transferred into the material,” Mr. Glossat says.

The BOMAG BW 213 BCV-5 and other BCV models will be available in Tutt Bryant’s hire branches in NSW, QLD, VIC, WA and SA.