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Bosfa/Flooring/Page 10

A conventionally reinforced solution would have required 2 layers of reinforcing bars to ensure a crack width of 0.2mm.

To achieve the same crack width, the Dramix® Combi Slab solution only required one layer of bars plus Dramix®. A simpler, faster and more cost effective option to construct.

Leakage of containment bunds can be an issue and costly to put right. Typical design and construction has sealed joints and expensive water stops. However, if the bund cracks outside these control points then there commonly isn’t enough reinforcing to control them to acceptable levels. Alternatively, heavy top and bottom reinforcing can be used to reduce the number of joints, this is expensive and difficult and time consuming to construct.

TYPE OF APPLICATION:
Joint free liquid tight slab

2012:
North Island, New Zealand

This project required a joint free watertight slab to support tanks containing water and fertilizer. This required a crack width calculation of 0.2mm.

SA Water engaged SMEC Engineering to design a 400m long flood channel to cope with a high water flow of 20m/sec. A channel of this size poses numerous detailing and construction issues, however the adoption of the Dramix Combi Slab solution ensured simplification of the traditional steel, removal of water stop joints, allowed for a quicker construction programme and met the required crack width requirement of 0.2mm.

View the Video

LOCATION:
Reclaimed land which couldn’t support a slab on grade

There have been several projects designed and completed in Melbourne for Australand by Anglo Italian Concrete P/L, using the Formula Floors D & C approach. The CABAC facility at Seven Hills, is the first Formula Floors package put forward by Anglo Italian and accepted by Australand in Sydney.

The 8,000 sqm internal slab was designed to carry a 6 tonne post load and had to be a burnish finish providing a hard wearing, very flat floor.

Concrete was supplied by Hanson Construction Materials, at Pendle Hill and the slab area was completed in 7 pours. All Dramix® Steel Fibre Concrete was placed by Laser Screed resulting in very flat tolerances.

As well as the ground slabs there were two composite suspended slabs on King Floor 70 decking incorporating Dramix® high performance RC80/60 BN steel fibres. This allowed for ease of placement and met with OH&S standards on site.

PROJECT:
CABAC Distribution Facility, Seven Hills, Sydney

BUILDER:
AUSTRALAND INDUSTRIAL

CONTRACTOR:
ANGLO ITALIAN CONCRETE SERVICES P/L