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| Frequently Asked Questions | ||
Q |
Where does the material come from? | |
A. |
An important part of the UK's waste strategy includes mass burn treatment. This provides fuel for 'Energy Recovery Facilities (ERF)' plants which generate electricity fed into the National Grid. The process burns virtually all the combustible materials within the household waste. The remaining material consists of fused and partially fused clinker, glass, ceramics, stone, concrete, brick and metals, which is raw IBA. |  |
Q. |
What does processing do? | |
A. |
The raw IBA is put through a process that removes the metals and the small percentage of raw material that is unusable. The remaining material is screened into varying size fractions of Incinerator Bottom Ash Aggregate (IBAA). |  |
Q. |
How can the quality of IBAA be assured? | |
A. |
IBAA is manufactured to our own Quality Protocol, which features a wide range of routine testing against specifications for many applications. | |
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Q. |
How do you know that the product will always be the same? | |
A. |
It may seem surprising but, following our established process, experience shows that there is virtually no difference in the final product at all our production plants. This is because there is little difference in the contents of refuse bins from winter to summer or from town to town. It will probably contain paper & plastic packaging, broken china, glass and plastic bottles, food waste and occasionally garden rubbish. What difference there is can be traced to the method of incineration and the age of the ERF plant. The time of year will affect the moisture content of the material, but this is within acceptable limits. | |
Q. |
Is the material safe? | |
A. |
COSHH assessment has shown that IBAA can be treated in the same way as other aggregate materials. | |
Q. |
What is the material used for? | |
A. |
IBAA has a number of uses within the construction industry. It is used to replace primary aggregates within asphalt, concrete and block manufacture as well as unbound granulate fill materials. The material has a lower bulk density than conventional aggregates and therefore has cost advantages to the customer. Examples of other applications include brownfield remediation and landfill engineering. | |
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