The standard states that the sample be compacted in the mold, trimmed, and returned with porous disks. We've always performed the compaction in the empty mold (no disks) and trimmed off a fair amount of excess soil from the bottom and tried to limit excess on top. AMRL has never indicated that...
We have both Troxler and Humboldt gauges (as well as some older CPNs) and you probably want to buy the Troxler. It will be more expensive, but they are more reliable. The upside to a Humboldt is that it is assembled to allow for the user to replace parts without sending away. The Humboldt (we...
