Why does my driveway have pop outs (small areas about the size of a dime to a quarter in size and about ¼" deep) ?
Posted by DRSC Concrete - 04/13/2017, 03:38 pm
The divots you see are referred to as aggregate pop outs. They are caused by soft rock used in your concrete mix. Aggregate pop outs occur most often during winter conditions in cold climates that experience below freezing temps. The aggregate used to produce your concrete contained rocks that were soft, almost like chalk. The soft rocks absorb moisture and when they freeze, that moisture expands, popping out of place and causing the divots in your driveway.
This is not an installer caused problem, it’s caused by the aggregate used from the supplier.