1 Scope

This PAS specifies minimum requirements for the production of reprocessed gypsum from waste plasterboard intended for a range of applications in existing and emerging end markets.

This PAS covers the selection, receipt and handling of input materials, the specifications of material grades, and the storage, labelling, dispatch and traceability of the materials. It also specifies requirements for a quality management system for the production of grades of reprocessed gypsum to ensure they are consistently fit for their intended uses.

This PAS is for reprocessed gypsum produced from waste plasterboard that has been separately collected, or sorted and segregated from, other wastes, products or materials.

Likely sources of waste plasterboard include:

1. plasterboard manufacturing waste;

2. over ordering on construction sites;

3. boards damaged during transportation, handling or storage;

4. off-cuts during installation; and

5. plasterboard stripped out during refurbishment and demolition works.

The requirements for the reprocessed gypsum grades specify particle size distribution, residual paper content, purity, physical contamination and chemical composition limits, and acceptability of both colour and smell.

The end markets to which this PAS applies include, but are not limited to:

1. plasterboard manufacture;

2. cement manufacture;

3. manufacture of construction products;

4. soil treatment in agriculture and horticulture;

5. manufacture of growing media;

6. manufacture of proprietary fertilizers;

7. soil stabilization and binding;

8. dewatering agent for sludges;

9. clarifying aquatic environments; and

10. absorbent for liquid spills.

In order to accommodate the widening range of end user requirements for reprocessed gypsum variations or additions to an end user specification might be required. However, in all instances, the standard set by this PAS could be the minimum requirement. In addition to meeting the standard set by this PAS, the reprocessor is responsible for attaining any requirement permits and consistently fulfilling any additional quality needs, such that the materials are safe and consistently fit for their intended purposes.