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Aggregates are used in the making of concrete

Concrete is composed of water, cement paste,

coarse aggregates, fine aggregates, and admixtures

Aggregates help the strength of the concrete byfilling in void spaces and resisting compressive

stress.

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Air content

Bulk density

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Economy

Compatibility with other materials

Material properties

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Brick

Concrete

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Ferrous Metal

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Masonry

Non Ferrous Metal

Paper And Cardboard

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Plastic

Timber

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Each and every aggregate is produced differently

Recycled Concrete

Poraver

Granulated Blast Furnace Slag

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Simple process involving breaking removing and

crushing concrete into specified size and quality

(sold at a size of 37.5mm50mm)

Reinforcing steel and other embedded items mustbe removed before the quality of the aggregate can

be produced

Removal of contaminants is achieved by

demolition, screening or air separation, andreduction of size

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Post consumer glass is collected through municipal

box programs

Glass is sent to a plant where grinded up to a

powder, mixed with water and expanding agents,and is put into a furnace

Cooks at 900 degrees Celsius to produce the tiny

lightweight glass balls

The finished product of Poraver

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Slag and iron are collected at the bottom of a blast

furnace when iron is processed

Slag is separated from iron and then undergoes

granulationGranules are then cooled down which creates a

non-metallic product

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Recycled Concrete

Provides sustainability

Reduces the amount of material that would be

delivered to a landfill

Any metals that can be removed from the aggregate

can be disposed properly

Reduces the need of virgin aggregates to be created

Absorbs large amount of carbon dioxide while being

crushed into smaller sizes, reduces the amount of CO2in the atmosphere.

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Granulated Blast Furnace Slag

Uses 90% less energy in production than the

production of Portland cement

Emission of carbon dioxide is almost negligible

Provides improved strength and durability

Reduces permeability

Improves workability

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Lack of appropriately located recycling facilities.

Absence of appropriate technology.

Lack of awareness

Resistance to change

Lack of experience

Inadequate codes, specifications and standards

Lower and variable quality

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During the time of construction order only thecorrect amount of raw materials.

Protect materials being delivered and stored in

the site. Save valuable fittings and materials.

Any suitable substitute for aggregate should beconsidered during the construction.

Re-evaluate technical specification for materials.