Abrasion resistance
A concrete surface's ability to withstand wear from traffic, equipment, and scraping. It is a property of the top layer, not of the mix's compressive strength alone.
What does abrasion resistance mean?
Because wear happens in the first fraction of an inch, finishing quality and curing dominate abrasion performance, with mix strength and hard aggregate contributing. Hard troweling, dry-shake hardeners, and chemical densifiers all improve it; bleed water finished into the surface and skipped curing destroy it. This is why two slabs with identical cylinder results can wear completely differently.
In practice
Forklift traffic finds every square foot where curing was skipped, usually within the first two years.