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Powder specifications

The standard quality specification for the recycled gypsum powder is as follows:

Criteria Demand
Cl (chlorid content) < 0.02 % weight
PH 7 < pH < 9
Free moisture < 10 % weight
Purity (content of CaSO42H2O) Max. 5 percentage points (weight) less than what has been supplied to the market area during the last 20 years
Particle size Up to 13 mm
Smell Odourless/neutral
MgO < 0.10 % weight
Na2O < 0.06 % weight

On request, customized quality specifications can be made for the powder. The standard particle size looks as depicted below. 70% of the powder has a size less than 1 mm.
The produced powder is very fine and extremely pure. Analytec has for example documented that GRIís recycled powder is 99% as good as the original gypsum raw materials as the organic carbon in the powder is less then 1%. Download the lab report here.

Acceptable waste even includes demolition gypsum waste containing nails, screws and various wall coverings. Ľ Read more

100% recyclable

The recycling system from Gypsum Recycling International secures that gypsum and plasterboard waste becomes 100 pct. recyclable. The reprocessed powder, app. 90 pct. of the waste, is returned to the plasterboard manufacturer for producing new plasterboards. The paper with related contaminants, equal to 10 pct., can be used for composting, heat generation, building materials etc. Hereby the gypsum and plasterboard waste is recycled 100 pct. and nothing is landfilled.
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