The phrase "a patch of concrete" is correct and usable in written English.
It can be used to describe a specific area or section of concrete, often in the context of a larger surface or environment.
Example: "The children played on a patch of concrete outside the school during recess."
Alternatives: "a section of concrete" or "a piece of concrete".
Sometimes they're worried about the extensive construction required to plant a tree in a patch of concrete.
Looking up, you see scores of athletic jerseys hanging above a patch of concrete where they're sold.
Hamilton and Beattie found a patch of concrete and tried to hear the speakers from One Pennsylvania, the coalition that had organized the rally.
In the game room, Terry Kirkpatrick, a customs agent, moved the billiard table and pulled back a rug, exposing a patch of concrete.
As a next step, Mr. Furman wants to tear up a patch of concrete and probe the area with ground-penetrating radar.
As I sat down in a lawn chair, two geese flew overhead, then alighted on a patch of concrete adjacent to the interweaving White Lightning and Blue Thunder slides.
What it meant in Southwark was a patch of level concrete with a few pleasure boats parked on it, surrounded by a high fence.
— On an embankment that runs along a towering steel fence separating this border town from its Mexican sister city, a patch of new concrete with a date carved into it stands out, marking the exit of a tunnel Border Patrol agents sealed in May.
Not only is it tiny, there cannot be another Football League manager who works amid electrical fuse boxes, a paint-splattered ladder and other groundsman's equipment, and whose desk is a minuscule occasional table parked between three old chairs on a patch of bare concrete floor.
It feels liberating to have the wind blowing through your hair, but when you find yourself face down in a patch of unforgiving concrete, you'll quickly forget your need for "freedom". Sure, these passwords are easy to remember, but they're also super easy to hack using techniques like brute force attacks.
He stands with a couple on a small patch of concrete near the foot of the bridge that has become matrimonial neutral ground.
