Secondary Aggregate: Difference between revisions
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The [[Mineral Products Association]] ([[MPA]])<ref>[https://mineralproducts.org/documents/Contribution_of_Recycled_and_Secondary_Materials_to_Total_Aggs_Supply_in_GB.pdf The Contribution of Recycled and Secondary Materials to Total Aggregates Supply in Great Britain]</ref> define three types of Aggregate: | The [[Mineral Products Association]] ([[MPA]])<ref>[https://mineralproducts.org/documents/Contribution_of_Recycled_and_Secondary_Materials_to_Total_Aggs_Supply_in_GB.pdf The Contribution of Recycled and Secondary Materials to Total Aggregates Supply in Great Britain]</ref> define three types of Aggregate: | ||
* Primary Aggregate - minerals that are extracted for aggregates use | * Primary Aggregate - minerals that are extracted for aggregates use | ||
* '''Recycled Aggregate''' - materials derived from [[Construction, Demolition and Excavation waste (mining waste)]] ([[CD&E Waste]]) including railway ballast (but excluding recycled soils and asphalt planings) | * '''[[Recycled Aggregate]]''' - materials derived from [[Construction, Demolition and Excavation waste (mining waste)]] ([[CD&E Waste]]) including railway ballast (but excluding recycled soils and asphalt planings) | ||
* [[Secondary Aggregate]] - materials which are the by-products of other industrial, production or extractive processes, including blast furnace iron and steel slags and [[Incinerator Bottom Ash]] ([[IBA]]) | * [[Secondary Aggregate]] - materials which are the by-products of other industrial, production or extractive processes, including blast furnace iron and steel slags and [[Incinerator Bottom Ash]] ([[IBA]]) | ||
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==Market Size and Context== | ==Market Size and Context== | ||
Generally in the waste sector [[Secondary Aggregate]] can be used to describe both | Generally in the waste sector [[Secondary Aggregate]] can be used to describe both '''Recycled Aggregate''' and [[Secondary Aggregate]] of any sand and stone material that has been used previously (further details on the waste that falls into this broad category is listed on the WikiWaste page [[Soil, Rubble, Hardcore]]), and recycled or recovered to a '''Secondary Aggregate Specification'''. In this context Secondary Aggregate can also be produced from the [[Soil, Rubble, Hardcore]] from Local Authorities - primarily from waste deposited by the public at [[Household Waste Recycling Centres]] ([[HWRC]]). | ||
The overall split of Aggregates (for 2017) is summarise below from the same MPA document: | The overall split of Aggregates (for 2017) is summarise below from the same MPA document: | ||
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*Unbound recycled aggregate: for use as Granular fill, General fill, Capping | *Unbound recycled aggregate: for use as Granular fill, General fill, Capping | ||
*Unbound recycled aggregate: for use as sub base | *Unbound recycled aggregate: for use as sub base | ||
* | *recycled aggregate for concrete | ||
* | *recycled aggregate for asphalt | ||
* | *recycled aggregate for hydraulically bound mixtures | ||
*Reclaimed asphalt for use in bitumous mixtures (often termed planings) | *Reclaimed asphalt for use in bitumous mixtures (often termed planings) | ||