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Dust extractor-cleaners from Kennards Concrete Care

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A combination of dust collection and extraction machines, hired from Kennards Concrete Care, ensured maximum worker safety during construction of a $40 million electricity substation.

Fugen Construction is building the zone substation for EnergyAustralia at Kogarah in Sydney’s south.

As part of the project, due for completion late in 2009, the concrete slab had to be scarified so that a topping could be laid.

Following a free site inspection to assess the best equipment for the job, Kennards Concrete Care provided two 415V, 10in planers, each connected to a heavy-duty, industrial vacuum unit.

As an extra measure, a new dust extractor was also recommended.

These units, which operate on 240v 10amp power, have a fan that is 500mm in diameter, and produce a flow capacity of 6800cfm. They can be used with or without a sock attachment.

The sock, which was used to advantage at the substation, is seven metres long and 1.2 metres in diameter when inflated. Zippers allow the contents to be emptied and the sock washed.

Fugen Constructions foreman Robert Zukowski said dust extraction was a major priority during the concrete planning because of the enclosed nature of the new building.

“Between the different types of machines, we got an environment that was virtually dust free,” he said.

Robert said the new topping on the concrete slab was needed because of the electrical machinery to be used in the substation.

“The machinery will be quite big and on uni struts, so the slab has to have a plus or minus tolerance of 1mm over 3 metres,” he said.

“This is pretty much unachievable with standard concrete so we had to do a topping slab, 32 MPa – 90 MPa in various areas and 65mm thick.”

Kennards Concrete Care has outlets in Sydney, Brisbane, Melbourne and Perth.

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