ASTM InternationalASTM D1557Test Methods for Laboratory Compaction of Soil Using Modified Effort (Modified Proctor).Referenced across 3 Anvilfield field guides. Field guides that apply ASTM D1557LandscapingLandscapingPaver hardscape installationLandscapingSite grading and earthworkPavingPavingPavement base and subgrade compaction Often cited alongsideASTM D698ASTM C1782ASTM C33ASTM C936 Browse all codes and standards