Concrete is a very durable product, but it is also porous and is prone to absorbing unwanted materials. Over time, dirt and debris can accumulate, and mold and mildew spores can take hold. Some of the most common culprits around garages and driveways are oil and grease spills.
There are many ways to clean concrete, so there really isn't much to worry about. Just incorporate some of these techniques into your yearly maintenance, and there is no reason why your surface can't last and look attractive for several years.
Pressure washing, steam cleaning, and blasting are just some of the many techniques applied to concrete surfaces. A more intense method is sometimes used when the surface requires more and this is called mechanical cleaning. Mechanical cleaning is often used in the preparation for applying seals or stains to concrete.
Mechanical cleaning involves the use of special machines which come in two types: rotary and impact. Rotary equipment utilizes discs and grinders to remove the unwanted layer of concrete. Rotary machines only work on low-compressive strength concrete and not those that are harder and denser. Impact machines include bush hammers, scabblers, and needle guns that carefully chip-away the surface of the concrete. They require compressed air and hammer away at the concrete surface until you reach the desired finish. This can be an effective way to add texture to concrete, and is sometimes even more effective than blasting techniques.
Mechanical cleaning requires a fair amount of skill, and unless you don't mind experimenting with your surface, the job is normally better left-up to professionals. Request free estimates from prescreened concrete contractors in your area.
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