Residential Exposed Aggregate Services
An exposed aggregate finish can be any type of aggregate that is left exposed in the final surface of the concrete.
Aggregate is just a fancy way of saying stone, pebble, rocks or sand.
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Types of exposed aggregate finishes
Standard exposed aggregate: Aggregate is mixed into the concrete batch itself, whereas the surface aggregate will be a random placement of any of the type of aggregate that were originally mixed.
Abrasive blasting: This is where an abrasive, usually sand, is blasted at the surface of hardened concrete. The blasting exposes small sand and aggregate giving a rough surface texture similar to that of sand paper.
Acid etching: This is a chemical means by which an acid solution (Muriatic Acid & Water) is applied to the hardened concrete surface and etches or burns through the cement portion of the concrete. The aggregate usually the small sand bits are left exposed and give a similar look to that of a sand blasted finish.
Concrete grinding or polishing: Grinding removes the thin layer of cement paste and cuts the aggregates to a uniformly smooth surface resembling terrazzo. The surface can be a dull matte finish or, with the use of increasingly finer grinding pads, can reach a high luster