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[[File:Clear stone.jpg|thumb|Note the low proportion of fines, the uniform size and angularity of this clear stone sample.]]

[[File:Clear stone.jpg|thumb|Note the low proportion of fines, the uniform size and angularity of this clear stone sample.]]

This article gives recommendations for aggregate to be used to store water for infiltration. This is usually called 'Clear stone' at aggregate yards. To see an analysis of Ontario Standard Specifications for granular materials, see [[OPS Aggregates]]. For advice on decorative surface aggregates see [[Stone]]

This article gives recommendations for aggregate to be used to store water for infiltration. This is usually called 'Clear stone' at aggregate yards. To see an analysis of Ontario Standard Specifications for granular materials, see [[OPS Aggregates]]. For advice on decorative surface aggregates see [[Stone]]

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File:Particle void ratio.png|thumb|The highest void ratio is found in uniformly graded aggregate, as there are no smaller particles to occupy the inter-particle pores. <ref name = Judge/>

File:Particle void ratio.png|The highest void ratio is found in uniformly graded aggregate, as there are no smaller particles to occupy the inter-particle pores. <ref name = Judge/>

File:Particle permeability.png|thumb|Higher permeability is found in larger, angular, uniformly graded aggregate. This is due to larger pore sizes and lower tortuosity. <ref name = Judge/>

File:Particle permeability.png|Higher permeability is found in larger, angular, uniformly graded aggregate. This is due to larger pore sizes and lower tortuosity. <ref name = Judge/>

</gallery>

</gallery>

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[[category:materials]]

[[category:materials]]