Sand, Gravel and Crushed Stone - Midwest Concrete MaterialsCrushed Concrete. is our recycled concrete. It can replace AB-3 used for base material. Line Screenings. are a by-product from crushing line into.crushed line screening,#10 Line Screenings (Powder to 1/4") - Three Z Supply Inc.Whitish-gray solid stone. Comes from natural sources and is crushed to different sizes. Because it is crushed, it is not round stones, it has corners and edges.Aggregates - Hard-Co Sand & GravelA finely crushed gravel comparable to line screenings. It is used underneath interlocking brick, and has better drainage than the line screenings.
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