Putzmeister's concrete pumps set new record
With the completion of Burj Dubai's 126th floor (level 125) in May, high-rise concrete pumping has been raised to a new level. Three Putzmeister high-performance concrete pumps have been deployed just below the ground floor, with the upper height determined at 452,025 m. Hence the concreting team of Unimix, which is in charge of concrete pumping at Burj Dubai, has set a new record in high-rise concrete conveying through vertical pipe systems.
The earlier world record was also set by a stationary Putzmeister concrete pump, BSA 2100 HE, in 1994, when the ring space of an ascending, 790 m long water pressure pipe was backfilled. This pump is the forefather of the concrete pumps HPD operating at Burj Dubai.
The mighty Volvo L350F is big on power, brilliant on fuel
The L350F is the largest wheel loader ever produced by Volvo Construction Equipment, marking a great stride in productivity, comfort and reliability. When tested in tough load and carry applications the new wheel loader from Volvo CE recorded an 18 per cent rise in productivity and 46 per cent better fuel economy over its predecessor. The new model will be easier and more comfortable to operate, leading to faster cycle times and sustained high performance throughout the workday.
The L350F is fitted with a Volvo D16E engine that produces most of its 397 kw of power and 2550 Nm of torque at low engine speeds. The engine features Volvo's simple and proven V-ACT (Volvo Advanced Combustion Technology) system.
Metso's Lokotrack LT 105 is a real crusher
When it comes to crushing plants, perhaps the world's most popular name is Lokotrack. Its LT105 model is being put together in Metso Minerals' Tampere plant in Finland. With its compact design and ability to reach a maximum capacity up to 400 tonne per hour for a crusher weighing less than 40 tonne, the LT has gained worldwide popularity. The Lokotrack LT105 is built around the proven Nordberg C series jaw crusher.
It is equipped with an intelligent control system and maintains steady, high-level production.
The LT105 can be used both in crushing of hard natural rock and also recyclable materials. According to the application, LT105 can be equipped with many optional items like dust suppression system and magnetic separators. With its Caterpillar 224 kW diesel motor, LT105 meets the strictest Tier III exhaust emission standards.
The large intake opening of 1,060 x 700 mm of the C105 jaw crusher added with a large, 6 or 9 m3 feed hopper enables easy feeding of the unit.
When needed, fines can also be separated using a side conveyor ahead of the crusher.
Volvo's F-series loaders: a distinct improvement
The L110F, L120F, L150F, L180F and L220F are the middleweights in the new F-Series range of wheel loaders from Volvo Construction Equipment. They offer more operator comfort, more productivity and lower maintenance. Replacing the extremely successful E-Series, the F-Series wheel loaders are a distinct step up. It is a complete range of loaders based on an integrated and largely interchangeable system of components for simplified maintenance.
The L110F and L120F are both fitted with a seven-litre Volvo D7 engine, producing 231 hp and 245 hp respectively. Both units produce their maximum torque of 786 lb/ft at just 1,500 rpm. The larger of the mid-sized wheel loaders are fitted with the 12 l D12 Volvo engine, whose maximum power is 286 hp (L150F), 320 hp (L180F) and 355 hp (L220F).
Hard rock poses challenges for drillers Five Sandvik Tamrock hydraulic crawler drill rigs are being used on a project to cut a new highway through the Hajar Mountains in the UAE and link the emirates of Fujairah and Dubai. The client for the project is the UAE Ministry of Public Works and Housing, with Al Turath Engineering Consultants /Wilbur Smith and Associates acting as the consultant. Cutting through the mountains involves two separate contracts. Both are approximately equal in length, Contract 1 being 23 km and Contract 2 being 22 km.
Drilling and blasting for both these sections is being handled by Arabian Rock Engineering Co, an Oman-based company with more than a quarter century of experience in working in Oman's mountainous terrain, on the other side of the Hajar range to Fujairah. The standard depth of the bench drilling and pre-split holes as designed is up to 18 m.
© Construction World 2007
