Size & Grading Requirements for Coarse Aggregates
A.R.E.M.A. = American Railway Engineering and Maintenance-of-Way Association ... and 4 are main line ballast materials * Gradation Numbers 5 and 57 are yard ballast materials. 2. Old Pa # = The old Pennsylvania Department of Transportation reference to aggregate sizing ... & Crusher Run is Type B; both require LA Abrasion < 45%) 4. AASHTO ...
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