Overview:

Polypropylene plastic voids designed to displace non-working dead loads while maintaining biaxial strength in elevated concrete slabs. Suitable for multi-residential, commercial and industrial applications.

 

Product Description:

Cobiax® is a system of hollow plastic voids, made from HDPE and polypropylene, which are placed between the upper and lower steel reinforcement mats in a concrete slab. Product therefore displaces concrete which has no structural benefit, optimising the slab’s thickness and building material volume.

Product reduces weight of slabs by up to 35% (compared to a solid slab of the same bearing capacity), while maintaining the same biaxial and flexural strength. Product can also increase span dimensions of the building’s vertical bearing elements (up to 18m spans without beams are achievable) which may decrease structural materials required, such as support columns. The reduction in dead weight also facilitates savings in foundation loads, for example fewer piles or length of piles.

System integrates specific reinforcing steel cages with void formers to speed erection and simplify handling of void formers. Product is suitable for elevated concrete slab construction where long spans without beams are required. Suitable for in-situ cage modules (CBCM) as well as semi pre-cast concrete panel applications (CBSP). Scraps from manufacturing of other products are reprocessed as raw material for plastic void manufacture.

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Country of Origin

South Africa

ecospecifier Issues of Concern / Red Lights

None

Assessment Comparision

Solid concrete slabs, steel reinforcing mesh, other concrete displacement methods.

Keywords / Alternatives

Lightweight concrete, cement replacement

Availability:

South Africa

Other information:

Information last verified on 07/07/09.

Assessment Criteria Satisfied

ENERGY/GREENHOUSE

Potential less GHG/ODP down stream

HABITAT & LAND

Reduced terrestrial impact

RESOURCE DEPLETION & EFFICIENCY

Reduced transport energy Reduce material use

POLLUTION TO ENVIRONMENT

Reduced chemical toxicity through Life Cycle Low/no carcinogens through life-cycle Reduced smog-forming potential

OTHER VITAL SIGNS

Environmental info about product Doc Manuf Claim

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