Burj Dubai to break world record for vertical concrete pumping

DUBAI — The team behind the construction of Burj Dubai, on course to be the world's tallest building on completion, is set to break the world record for the highest pumping of concrete, members of the British Business Group (BBG) will be told today.

By A Staff Reporter

Published: Wed 4 Apr 2007, 8:35 AM

Last updated: Sat 4 Apr 2015, 9:01 PM

Greg Sang, Assistant Director - Projects with Burj Dubai developers Emaar Properties, will tell the group that he is confident the record for pumping concrete vertically, which currently stands at 448 metres, will fall within the next few months. The present record is held by the 508-metre-high Taipei 101 building in Taiwan.

Mr Sang is speaking at a meeting of the BBG's Construction Special Interest Group being held at Nad Al Sheba. He will describe the challenges behind the design and construction of the tower, which is currently 119 levels and over 400-metres high and on course to replace Taipei 101 as the world's tallest building.

To date, 267,426 cubic metres of reinforced concrete and 49,684 tonnes of reinforcing steel have been used in the construction of Burj Dubai, the final height of which remains a closely guarded secret.

Sang will tell the BBG that the usual surveying techniques using lasers to monitor the verticality of the structure were not viable in the case of the Burj Dubai due to lasers' limited range of around 400 to 500 metres. Instead the Burj Dubai construction team is, as far as Sang is aware, the first in the world to use GPS for this purpose.

He will also describe how the team is using airlocks to combat the 'chimney effect', which typically affects very tall buildings with high contrasts between interior and exterior temperatures. If left unremedied, the cool air inside the building during Dubai's hot summer months would sink creating high pressure at the bottom and causing problems such as stuck doors and whistling sounds, however airlocks prevent this by controlling airflow.

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