Guide to Cement-Treated Base (CTB)
(2) miscellaneous material such as caliche, scoria, slag, sand-shell, cinders, and ash; (3) waste material from aggregate production plants; (4) high-quality crushed stone and gravel base course aggregates; or (5) old flexible pavements, in-cluding the pulverized bituminous surface and stone or gravel base course.
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