Composite and asphalt pavement layers.
https://diqn32j8nouaz.cloudfront.net...s_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...049#post184160
https://www.homemadetools.net/forum/...541#post228539
https://www.homemadetools.net/forum/...029#post217649
https://www.homemadetools.net/forum/...913#post217286
https://www.homemadetools.net/forum/...944#post229860
