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12:39 05 Mar 2003
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With business booming in certain sectors of the demolition
industry, manufacturers are keen to meet the demand for more
efficient machines.
Hydraulic excavators and new attachments are key areas of demand for demolition contractors.
In response to this need, Digbits has updated its hydraulic crusher, the BAV3 model for 2003.
The Series 2 version of the attachment, designed for mini and midi excavators, now includes detail specification changes to the jaw profile and carbide tooth set-up. With on-site recycling becoming ever more necessary, the BAV3 is claimed to provide one of the fastest and most cost-effective methods of processing concrete debris for any site or contractor which already has a mini or midi excavator. Fitted to any excavator from 3t to 9t, this unit will allow recycling of concrete and stone on site, to varying grades, as well as the separation and cutting of reinforcing bars and wires.
On the Case
When it comes to the speedy changing of attachments, Case reckons it only takes an operator 30 minutes to change from high reach equipment to standard boom and dipper arm configuration or vice versa on its CX demolition rigs.
Its range of four hydraulic excavators - CX290, CX330, CX460 and CX800 - accommodates high reach demolition attachment configurations which extend from 17m up to 40m, while the flagship CX800 is equipped with a telescopic boom that Case claims enables the operator to work between 28m and 40m without changing the equipment.
In addition, the undercarriage can be extended hydraulically to provide extra stability when working at near or full height. In high-reach configuration, with a three-piece attachment arrangement, the CX800 also boasts a forward reach of 20m and a maximum tool weight of 2.5t.
Case provides protection from falling debris for the base machine with a heavy-duty steel roof and front windscreen guards. Heavy-duty belly plates - 11mm to 12mm thick underneath the upper structure - protect the valve blocks, pumps, drive motors, hydraulic tank, pipework and engine.
Volvo upgrades excavator
As far as Volvo's EC210BLC is concerned, heavy-duty additions such as the demolition cage around the cab and the side skirt protection have proved to be winners.
Hertfordshire-based demolition contractor Advanced Demolition took delivery of its first Volvo excavator at the end of 2002 and says it will not be its last.
Equipped with a six cylinder Volvo engine that offers a nett installed power of 143hp and maximum torque of 647Nm achieved at 1,425r/min, the EC210BLC is fitted with heavy-duty FOGS guarding as well as 700mm track plates as standard, giving the machine an operating weight of 21.8t.
Other standard features include boom and dipper cylinders with hose rupture valves, quick hitch hydraulics and hammer/shear hydraulic lines.
Mantovanibenne thinks big
An attachment that requires a heavy-duty carrier excavator is Mantovanibenne's SH1000R - the biggest shear in the company's range, which boasts a cutting force of 555t and a working pressure of 350bar.
Weighing in at 11.5t, it is recommended that a 75t carrier excavator is used when the shear is mounted straight on to the boom and a machine of 120t is specified for longer reach applications when the shear is fitted to the excavator stick.
The cycle time, typically, is around seven per minute with an opening time of five seconds and a closing time of 3.5 seconds. According to Inmalo, importers of Mantovanibenne machines, the shear's jaw opening maximum is 1,054mm and 360¼ continuous rotation - even in the most restricted areas.
JCBgoes robotic
Attachments play an important role when it comes to JCB Robot skid steer loaders. The company says, due to a growing demand for compact plant, there has been a definite upturn in the industry for mini and micro excavators along with skid steer loaders.
With industrial fork attachments, the JCB Robot is claimed to provide an alternative to a forklift that cannot access a cramped site due to height restrictions.
JCB's existing Robot 160 and 170 have been joined by the Robot 190 and 1110, which have tracks as well as wheels. According to JCB, this enables them to be used in a wider range of applications, particularly in hostile working conditions.
Liebherr gauges the market
A challenging site in Berlin recently saw two Liebherr machines being put through their paces. The R974 B VH-HD Litronic and R954 B V Litronic with hydraulic quick coupler were used to demolish the former C&A department store to make room for a new hotel.
According to Liebherr, the R974 B VH-HD is currently the only demolition excavator with a hydraulically variable gauge undercarriage. Depending on site conditions, the gauge can be adjusted between 3,400mm and 4,700mm. As well as reaching a working height of 37m, the machine has a reach of 20m with an optimal stability within a 360û working radius. With an operating weight of 120t, its Liebherr diesel engine offers an output of 360kW/490hp at 1,800rpm.
Its smaller relation, the R954 B V, has an operating weight of 68t and its Liebherr six cylinder in-line diesel engine has an output of 222kW/302hp at 2,000rpm. The two machines made short work of the 31m high department store which included three upper floors comprising a steel structure and another building with a reinforced concrete structure.
Along with hydraulic excavators and attachments, the world of crushing and screening is also busy launching new machines.
Crushing and screening
BL-Pegson has recently introduced the Cat powered 4242 SR. Based around the Trakpactor Horizontal impact crusher, the company says it comprises a complete crushing, screening and stockpiling unit built on one chassis with capabilities of up to 360t per hour.
The unit features a heavy-duty vibrating grizzly feeder with two-step grizzly, built-in under-screen and folding side conveyor for stockpiling waste material or a fourth product. Scalped material can also be fed on to the main product conveyor via a by-pass chute. Crushed material passes an overband magnetic separator for removal of rebar and steel when used in recycling applications, before being fed on to an 3,353mm by 1,524mm two-deck screen for sizing.
According to BL-Pegson, the whole plant can be set up to work within 10 minutes of arrival on site and has an approximate operating weight of 40t.
Other mobile crushers attracting attention are Nordberg's range of equipment. Bath-based Penny Plant Hire & Demolition has just bought a 36t Nordberg LT105 track mounted mobile crusher from Metso Minerals through its dealer, CRMS, to add to the LT105 the company already owns.
Not content with those two bits of kit, Penny Demolition has recently added a Nordberg LT1213 track-mounted mobile crusher to its crushing fleet, which includes an ST 170 self-propelled screening unit. n
Hydraulic excavators and new attachments are key areas of demand for demolition contractors.
In response to this need, Digbits has updated its hydraulic crusher, the BAV3 model for 2003.
The Series 2 version of the attachment, designed for mini and midi excavators, now includes detail specification changes to the jaw profile and carbide tooth set-up. With on-site recycling becoming ever more necessary, the BAV3 is claimed to provide one of the fastest and most cost-effective methods of processing concrete debris for any site or contractor which already has a mini or midi excavator. Fitted to any excavator from 3t to 9t, this unit will allow recycling of concrete and stone on site, to varying grades, as well as the separation and cutting of reinforcing bars and wires.
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On the Case
When it comes to the speedy changing of attachments, Case reckons it only takes an operator 30 minutes to change from high reach equipment to standard boom and dipper arm configuration or vice versa on its CX demolition rigs.
Its range of four hydraulic excavators - CX290, CX330, CX460 and CX800 - accommodates high reach demolition attachment configurations which extend from 17m up to 40m, while the flagship CX800 is equipped with a telescopic boom that Case claims enables the operator to work between 28m and 40m without changing the equipment.
In addition, the undercarriage can be extended hydraulically to provide extra stability when working at near or full height. In high-reach configuration, with a three-piece attachment arrangement, the CX800 also boasts a forward reach of 20m and a maximum tool weight of 2.5t.
Case provides protection from falling debris for the base machine with a heavy-duty steel roof and front windscreen guards. Heavy-duty belly plates - 11mm to 12mm thick underneath the upper structure - protect the valve blocks, pumps, drive motors, hydraulic tank, pipework and engine.
Volvo upgrades excavator
As far as Volvo's EC210BLC is concerned, heavy-duty additions such as the demolition cage around the cab and the side skirt protection have proved to be winners.
Hertfordshire-based demolition contractor Advanced Demolition took delivery of its first Volvo excavator at the end of 2002 and says it will not be its last.
Equipped with a six cylinder Volvo engine that offers a nett installed power of 143hp and maximum torque of 647Nm achieved at 1,425r/min, the EC210BLC is fitted with heavy-duty FOGS guarding as well as 700mm track plates as standard, giving the machine an operating weight of 21.8t.
Other standard features include boom and dipper cylinders with hose rupture valves, quick hitch hydraulics and hammer/shear hydraulic lines.
Mantovanibenne thinks big
An attachment that requires a heavy-duty carrier excavator is Mantovanibenne's SH1000R - the biggest shear in the company's range, which boasts a cutting force of 555t and a working pressure of 350bar.
Weighing in at 11.5t, it is recommended that a 75t carrier excavator is used when the shear is mounted straight on to the boom and a machine of 120t is specified for longer reach applications when the shear is fitted to the excavator stick.
The cycle time, typically, is around seven per minute with an opening time of five seconds and a closing time of 3.5 seconds. According to Inmalo, importers of Mantovanibenne machines, the shear's jaw opening maximum is 1,054mm and 360¼ continuous rotation - even in the most restricted areas.
JCBgoes robotic
Attachments play an important role when it comes to JCB Robot skid steer loaders. The company says, due to a growing demand for compact plant, there has been a definite upturn in the industry for mini and micro excavators along with skid steer loaders.
With industrial fork attachments, the JCB Robot is claimed to provide an alternative to a forklift that cannot access a cramped site due to height restrictions.
JCB's existing Robot 160 and 170 have been joined by the Robot 190 and 1110, which have tracks as well as wheels. According to JCB, this enables them to be used in a wider range of applications, particularly in hostile working conditions.
Liebherr gauges the market
A challenging site in Berlin recently saw two Liebherr machines being put through their paces. The R974 B VH-HD Litronic and R954 B V Litronic with hydraulic quick coupler were used to demolish the former C&A department store to make room for a new hotel.
According to Liebherr, the R974 B VH-HD is currently the only demolition excavator with a hydraulically variable gauge undercarriage. Depending on site conditions, the gauge can be adjusted between 3,400mm and 4,700mm. As well as reaching a working height of 37m, the machine has a reach of 20m with an optimal stability within a 360û working radius. With an operating weight of 120t, its Liebherr diesel engine offers an output of 360kW/490hp at 1,800rpm.
Its smaller relation, the R954 B V, has an operating weight of 68t and its Liebherr six cylinder in-line diesel engine has an output of 222kW/302hp at 2,000rpm. The two machines made short work of the 31m high department store which included three upper floors comprising a steel structure and another building with a reinforced concrete structure.
Along with hydraulic excavators and attachments, the world of crushing and screening is also busy launching new machines.
Crushing and screening
BL-Pegson has recently introduced the Cat powered 4242 SR. Based around the Trakpactor Horizontal impact crusher, the company says it comprises a complete crushing, screening and stockpiling unit built on one chassis with capabilities of up to 360t per hour.
The unit features a heavy-duty vibrating grizzly feeder with two-step grizzly, built-in under-screen and folding side conveyor for stockpiling waste material or a fourth product. Scalped material can also be fed on to the main product conveyor via a by-pass chute. Crushed material passes an overband magnetic separator for removal of rebar and steel when used in recycling applications, before being fed on to an 3,353mm by 1,524mm two-deck screen for sizing.
According to BL-Pegson, the whole plant can be set up to work within 10 minutes of arrival on site and has an approximate operating weight of 40t.
Other mobile crushers attracting attention are Nordberg's range of equipment. Bath-based Penny Plant Hire & Demolition has just bought a 36t Nordberg LT105 track mounted mobile crusher from Metso Minerals through its dealer, CRMS, to add to the LT105 the company already owns.
Not content with those two bits of kit, Penny Demolition has recently added a Nordberg LT1213 track-mounted mobile crusher to its crushing fleet, which includes an ST 170 self-propelled screening unit. n
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