How to Remove Impurities On the Surface of Concrete?

 Impurities on the surface of concrete refer to liquids or solids that exist on the surface of concrete, which can affect the bonding and maintenance of floor coatings and concrete, or cause problems related to the use of floor coatings and concrete. Surface impurities must be thoroughly removed before construction.

Common Surface Impurities Include the Following:

1. The old coating, which is common in floor renovation projects, will be accompanied by oil stains.

2. Cement slurry, which is a thin layer formed by incompletely hydrated water slurry floating on the outer surface of the concrete. The reason is the continuous exposure of concrete constructed at lower temperatures.

In the air, or the concrete is plastered and pressed too much. The general floating layer is 1-2mm;

3. Concrete curing agent or release agent, or another contaminated grease.

Common Concrete Base Treatment Measures:

1. Shot blasting:

Shot blasting is the most effective, cleanest, and dust-free method for concrete. The shot-blasted concrete surface is clean and hard, and small cracks are easy to find. The concrete surface can be cut to 3mm thickness. It is suitable for large area use.

2. Grinding treatment:

Diamond abrasives are usually used, which can effectively remove local high points and surface impurities. YG Machinery has floor grinders specially used for processing concrete roads. Please contact us for the best quality and best price machines.

3. Milling treatment:

Suitable for concrete processing with old coatings or weak layers. It is suitable for partial treatment, and the later cost is high. YG machinery's floor scarifier machine can effectively remove impurities on the surface of the concrete, please contact us to know more about the machine.

4. Pickling treatment:

Pickling treatment will roughen the surface of the concrete, but it cannot remove laitance or other loose substances. Usually, a 10% hydrochloric acid solution is used. Combined with a high-pressure water gun, the effect is better. Suitable for local treatment.