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Flakiness and Elongation Indices for Concrete Agg

Flakiness and Elongation Indices for Concrete Agg

Flakiness and Elongation Indices for Concrete Agg

(OP)
Project on which I am working uses particle shape requirements - flakiness and elongation.  The definition for elongation is an H/D ratio > 1.8; Flakiness definition is d1/d2<0.6.  This is significantly more stringent that Canadian definition of elongation.

We have a limit of combined of 25% and quarries are unable to produce to less than 30% - generally about 35%.  We want to relax, but here the "word" in the specification is the "law" regardless.  

Does anyone have a really good idea of what difference 25% has compared to, say 35%??

Your help is appreciated.

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