Astm: D4546-21 Pdf |link|

) performed using a lateral-restraining rigid mold (consolidometer or oedometer): Test Method Specimen Type Core Objective / Description Test Method A Reconstituted (Compacted)

Originally published in 1985, D4546 is the definitive American standard for measuring the swell or collapse potential of compacted or undisturbed soils. It simulates what happens when a soil’s moisture content increases under a given vertical pressure (load). Astm D4546-21 Pdf

The amount of pressure required to prevent a soil from expanding. and composite materials.

This standard provides two test methods (Method A and Method B) for determining the collapse pressure of pipe used for storm and sanitary sewer applications. The test methods cover pipes made from various materials, including thermoplastic, corrugated metal, and composite materials. Astm D4546-21 Pdf