In the process of designing a rural aggregate surfaced roads in Alberta, Canada and noticed the that an LA abrasion test for surfacing aggregate (i.e. unpaved road) was not applicable, only required for asphalt concrete pavements and base course aggregate. Just curious why that might be the case.
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LA Abrasion testing and aggregate surfaced roads
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It can be applied to either, but is most often applied to aggregate bound in a matrix of asphalt or portland cement. It is simply a measure of how much degradation an aggregate can withstand under standard conditions. It is then applied as an estimate of the performance of the aggregate under actual conditions.
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EPA and FHWA have manuals for unpaved roads. You can check out, too: ; and this: . I have other references but have to dig them out.
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