Improperly laid concrete will show its age quickly. Even properly laid concrete can crack, or become pitted because of harsh weather, settling or impacts. Once a concrete surface becomes worn or damaged, you must perform repairs to stop the damage from spreading before the concrete must be removed and replaced. One method of concrete surface repair is to use thinset mortar to rebuild the top layer. Thinset mortar is a mixture of aggregates, cement and synthetic adhesives that make it bond to almost any clean surface.
Things You'll Need
- Scrub brush
- Masonry float
Pour degreaser onto the floor. Scrub the entire floor with your scrub brush, using small, circular motions.
Spray water onto the area to rinse away the degreaser. Let the floor dry completely.
Mix thinset mortar and water in your bucket, following the instructions on the mortar bag. Stir the wet mortar with your trowel.
Pour the thinset mortar onto the floor thick enough to make a 1/4-inch layer over the existing floor. Smooth the top of the layer with a masonry float.
Smooth the top of the mortar every hour for six hours. Leave the mortar to dry for 72 hours.
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