Secondary Aggregate: Difference between revisions

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[[Category:Tonnage & Waste Types]]

~~Generally~~ [[Secondary Aggregate]] ~~is sand~~ and ~~stone material that has been used previously~~ and ~~recycled or recovered to a~~ Secondary Aggregate ~~Specification. Further details on~~ the ~~waste that falls into this broad category is listed on the WikiWaste page~~ [[~~Soil, Rubble, Hardcore~~]].

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

* '''[[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]])

In order to produce a Secondary Aggregate Specification a [[Quality Protocol]] was developed by the [[EA]] and [[WRAP]] in consultation with key stakeholders, including the construction industry, in 2004 in order to demonstrate how [[Construction and Demolition Waste]] could be processed to an appropriate quality and conform with a [[European Aggregate Product Standard]] and achieve an [[End of Waste Criteria]]. It can be downloaded from the [[Mineral Products Association]] website <ref>[https://mineralproducts.org/documents/aggregates_quality_protocol.pdf MPA Website PDF]</ref>

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]]).

[[File:MPA Summary Image of Aggregates.png|left|Fig 1 of MPA Briefing Document on Aggregates]]__TOC__

==Market Size and Context==

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:

[[File:Aggregates Image from MPA.png|800px|left|Aggregates Image from MPA briefing document]]

==Quality Protocol for Aggregates from Inert Waste==

In order to produce a Recycled/Secondary Aggregate Specification a [[Quality Protocol]] entitled 'End of Waste Criteria for the production of aggregate from inert waste' was developed in 2004 by the [[EA]] and [[WRAP]] in consultation with key stakeholders, including the construction industry, in order to demonstrate how [[Construction and Demolition Waste]] could be processed to an appropriate quality and conform with a [[European Aggregate Product Standard]]. The main purposes are/where:

* clarifying the point at which waste management controls were no longer required;

* providing users with confidence that the aggregate they purchase conforms to an approved industry specification defined in accordance with an appropriate European aggregate standard;

* providing users with confidence that the aggregate is suitable for a use within a designated market sector(s) including by conforming with the industry standard; and

* protecting human health and the environment (including soil).

The Quality Protocol for It can be downloaded from the [[Mineral Products Association]] website <ref>[https://mineralproducts.org/documents/aggregates_quality_protocol.pdf MPA Website PDF]</ref>

==Primary Product Uses/Specification==

The same Quality Protocol sets out in Appendix B the standards and specifications which must be met for Recycled/Secondary Aggregate Specifications. In summary they include:

*Unbound recycled aggregate: for use as Pipe bedding, Drainage

*Unbound recycled aggregate: for use as Granular fill, General fill, Capping

*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)

The specification of Recycled/Secondary Aggregate is often also referred to primarily by the particle size of the material, the main ones being:

* '''6F4''' fine grading 0/32mm recycled aggregate from crushed hardcore from 32mm down to dust. Normally used as bulk fill to build up levels/as a capping layer

* '''6F5''' coarse grading 0/80mm (previously 6F2 recycled) - recycled aggregate as per 6F4 but from 80mm down to dust.

* '''Type 1''' - recycled aggregate containing concrete and asphalt from 40mm down to dust. Normally used for road and pathway construction

* '''Fines''' - a 6mm to dust product. Mainly used to backfill trenches containing cables

* '''Planings''' - recycled tarmac/asphalt plannings from roads. Normally used for the preparation of driveways and as a sub base to roads

==Reference==

@@ Line 1: / Line 1: @@
 [[Category:Tonnage & Waste Types]]
-Generally [[Secondary Aggregate]] is sand and stone material that has been used previously and recycled or recovered to a Secondary Aggregate Specification. Further details on the waste that falls into this broad category is listed on the WikiWaste page [[Soil, Rubble, Hardcore]].
+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
+* '''[[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]])
-In order to produce a Secondary Aggregate Specification a [[Quality Protocol]] was developed by the [[EA]] and [[WRAP]] in consultation with key stakeholders, including the construction industry, in 2004 in order to demonstrate how [[Construction and Demolition Waste]] could be processed to an appropriate quality and conform with a [[European Aggregate Product Standard]] and achieve an [[End of Waste Criteria]]. It can be downloaded from the [[Mineral Products Association]] website <ref>[https://mineralproducts.org/documents/aggregates_quality_protocol.pdf MPA Website PDF]</ref>
-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]]).
+[[File:MPA Summary Image of Aggregates.png|left|Fig 1 of MPA Briefing Document on Aggregates]]__TOC__
+<br clear='left'/>
+==Market Size and Context==
+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:
+[[File:Aggregates Image from MPA.png|800px|left|Aggregates Image from MPA briefing document]]
+<br clear='left'/>
+==Quality Protocol for Aggregates from Inert Waste==
+In order to produce a Recycled/Secondary Aggregate Specification a [[Quality Protocol]] entitled 'End of Waste Criteria for the production of aggregate from inert waste' was developed in 2004 by the [[EA]] and [[WRAP]] in consultation with key stakeholders, including the construction industry, in order to demonstrate how [[Construction and Demolition Waste]] could be processed to an appropriate quality and conform with a [[European Aggregate Product Standard]]. The main purposes are/where:
+* clarifying the point at which waste management controls were no longer required;
+* providing users with confidence that the aggregate they purchase conforms to an approved industry specification defined in accordance with an appropriate European aggregate standard;
+* providing users with confidence that the aggregate is suitable for a use within a designated market sector(s) including by conforming with the industry standard; and
+* protecting human health and the environment (including soil).
+The Quality Protocol for It can be downloaded from the [[Mineral Products Association]] website <ref>[https://mineralproducts.org/documents/aggregates_quality_protocol.pdf MPA Website PDF]</ref>
+==Primary Product Uses/Specification==
+The same Quality Protocol sets out in Appendix B the standards and specifications which must be met for Recycled/Secondary Aggregate Specifications. In summary they include:
+*Unbound recycled aggregate: for use as Pipe bedding, Drainage
+*Unbound recycled aggregate: for use as Granular fill, General fill, Capping
+*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)
+The specification of Recycled/Secondary Aggregate is often also referred to primarily by the particle size of the material, the main ones being:
+* '''6F4''' fine grading 0/32mm recycled aggregate from crushed hardcore from 32mm down to dust. Normally used as bulk fill to build up levels/as a capping layer
+* '''6F5''' coarse grading 0/80mm (previously 6F2 recycled) - recycled aggregate as per 6F4 but from 80mm down to dust.
+* '''Type 1''' - recycled aggregate containing concrete and asphalt from 40mm down to dust. Normally used for road and pathway construction
+* '''Fines''' - a 6mm to dust product. Mainly used to backfill trenches containing cables
+* '''Planings''' - recycled tarmac/asphalt plannings from roads. Normally used for the preparation of driveways and as a sub base to roads
 ==Reference==