Code of Practice

Code of Practice

A Code of Practice has been developed by members of the association in liaison with the Environment Agency to enable IBAA to be sold as a non-waste provided the strict conditions of the CoP have been followed.

The copyright and intellectual properties of the Code of Practice belong to MIBAAA and must not be used in full or part by others.


Summary of the MIBAAA document:
for the demonstration of
‘end of waste’
incinerator bottom ash aggregates (IBAA)
processed from Municipal Solid Waste incinerator bottom ash (IBA)
and used in bound and unbound applications in construction

This Code of Practice enables the producer of IBAA to demonstrate compliance with ‘end of waste’ legislation when their BS/EN aggregates product Standard conforming aggregate is used in bound or unbound applications in construction. It is modeled on Government guidance for achieving ‘end of waste’ in that it has procedures to ensure:

  1. 1. the IBA has been converted into a distinct and marketable product
  2. 2. the processed IBA can be used in exactly the same way as a non-waste
  3. 3. the processed IBA can be stored and used with no worse environmental effects when compared to the material it is intended to replace

These procedures are structured in the same way as the two well-established Quality Protocols for recycled aggregates and steel slag aggregates with regards to stringent waste acceptance controls for providing suitable waste for processing, and quality management to British/European aggregate Standard Factory Production Control requirements, including product sampling and testing.

Additionally, to address and manage the risk to groundwater through the unbound use of IBAA, the Code of Practice includes robust procedures for a Supply Site Risk Assessment to ensure that unbound IBAA is only supplied to sites shown to be meeting defined geological parameters to demonstrate that its use in construction will not lead to an overall adverse environmental impact greater than the use of natural aggregates.

Main stages and control mechanisms of the Code of Practice (Figure 1)

Code of Practice Figure 1

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