Road Compactor, Electric Gasoline Impact Compactor, Rammed Earth Compactor, Foundation Compactor Asphalt Vibration Compactor| | - AliExpress
Architectural energetics for rammed-earth compaction in the context of Neolithic to early Bronze Age urban sites in Middle Yellow River Valley, China - ScienceDirect
Cheaper, easier rammed earth technique. (cob forum at permies)