FM 5-430-00-1 Chptr 5 Subgrades and Base Courses
Additional information on soils, compaction, and California Bearing Ratio (CBR) . A rigid pavement made of concrete will have great flexural strength, ... These include caliche, lime rock, shells, cinders, coral, iron ore, rubble, and other similar materials. Some of these materials are weak rock that crush or degrade under.