SR can act as a high strength, corrosion resistant functional Void former.

No additional manufacturing equipment or skills required when adopting this new technology during the process. Once the bottom reinforcement is laid on the formwork, the Hollow bar could be positioned in place at specified intervals. It is then secured using cable/wire ties before the top reinforcement is positioned. This process could be repeated for thicker slabs designs to create a multitude of voids. Concrete is poured, compacted and the slabs/walls process is complete. The voids are now ready to provide other solutions during the construction phases.
When precast in factory, the weight of the structure will be reduced by 50%, which will assist in transporting and erecting. Once on site, the semi precast panels are lifted and place in position. This will serves as the formwork for the suspended slabs. The top reinforcement is laid, concrete is poured and the process is finished. Using semi-precast panels would in some instances be faster and more cost effective processes, which will be appealing to some projects.

Void Formers4 Vois Formers3

Void formers utilising SR will make considerable improvements in concrete structures for a variety of onshore to offshore applications without compromising designs and performance.
A hybrid approach to designs and detailing of reinforcement in concrete structures.
In order to mitigate the corrosion issues in RC, several experimental studies has been conducted using FRP bars, due to its corrosive resistance properties. However the ductility of the FRP reinforced concrete were being compromised.

To take advantage of the high strength and the corrosive resistance of the FRP bars, it is has been recommended a combination of steel with FRP bars, and targeting the cross section areas where corrosion is likely to be initiated. Recent publications from the “American society of Civil engineers”(ASCE 2015) provide results from experiments that conclude that this hybrid approach also improve the flexural ductility of the FRPRC structural elements.

Void Formers2 Void Formers1

Hollow core panels have historically been manufactured by machine in a factory

The ability to create a hollow core panel anywhere on site has now been made possible with SR technology. Whilst standard tubing could be used in concrete to achieve a hollow core structure, the standard tube will not have a chemical bond to the concrete.

SR Hollow Core can also provide adequate sound insulation as specified in the building codes and standards.

By incorporating the hollow bar in the detailing of concrete slabs/floors & wall designs, it will form multiple voids throughout the entire structures. This void can then used as conduit for services. The high strength-to-weight ratio of the FRP composite materials reduces the weight and provides additional strength to the structures. The hollow bar is so versatile and can be cast in concrete on site or precast in factory.

An example of this application is a precast or architectural precast panel use for building envelopes. The outer layer is precast using similar easy process to the how SR can be used.

 

 

 

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