Black Spacers: These are made from recycled plastic. They can cope with most standard applications and are cost effective.
Grey Spacer: Certain projects attract heavier manufacturing traffic with compactors, as commonly seen in Bubble deck type slabs. The flexibility of the grey virgin plastic is more forgiving, also ideal for civil applications. The feet are also designed to leave a smaller footprint than the COEM black version and most others available.
More forgiving, stable & spreads loads evenly compared to individual spacers and most others, no need to tie to mesh.
Able to space for cost saving or linked for various slab lengths/widths.
Saves labour and costs, increases efficiency. Speeds up installation.
Should recycled rather than virgin plastic be utilised. One should ensure testing of every batch is carried out, in order to comply with code 2425:2015. The composition of recycled plastic differs in every batch, as opposed to virgin products. Composition of raw virgin material can be controlled to produce consistent batches. COEM products are also more flexible and less likely to snap. Less wastage.
Engineers are recommended to specify virgin, and instruct not to use recycled plastic in order to ensure compliance to 2425:2015. Using recycled could affect insurance cover, should faults, disagreement or incidents occur. A classic example, automobiles with a faulty tire may not be the cause of an accident. However the driver will not be covered.