TL;DR
Compaction is the mechanical densification of soil or aggregate, using plate compactors, rammers, or rollers, to squeeze out air voids so the material can carry load without settling. Crews work in lifts of a few inches, often adding moisture to reach optimal density, and results are checked against a Proctor laboratory value with a nuclear gauge on engineered jobs.
What it means
Compaction is the mechanical densification of soil or aggregate, using plate compactors, rammers, or rollers, to squeeze out air voids so the material can carry load without settling. Crews work in lifts of a few inches, often adding moisture to reach optimal density, and results are checked against a Proctor laboratory value with a nuclear gauge on engineered jobs. Skipped or rushed densification under driveways, paver patios, and backfilled trenches is the most common reason hardscapes sink within a few seasons.
Where it sits in the glossary
Compaction is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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