ASTM D 1883 - 07 Standard Test Method for CBR (California Bearing Ratio) of Laboratory-Compacted Soils

American Society for Testing and Materials (ASTM). Current edition approved Nov. 15, 2007. Published December 2007. 9 p. This test method covers the determination of the CBR (California Bearing Ratio) of pavement subgrade, subbase, and base course materials from laboratory compacted specimens. The test method is primarily intended for (but not limited to) evaluating the strength of materials having maximum particle sizes less than 3⁄4 in. (19 mm).