Concrete is extremely heavy and dangerous, so take every precaution in avoiding injury.
There are several reasons why old concrete might need to be removed. Among those the most common are simply age, frost heaving, or upheaval caused by nearby tree growth. It is important to consider patching or repair if possible. However, should deep cracks appear in the concrete surface, then removal becomes the only option.
There are a few methods for concrete removal, which depend on the type of task at hand. For instance, repair versus total replacement of the surface. What will happen to the concrete after removal may also direct which method is chosen.
Safety is rule number one when working with concrete, especially demolition. Concrete is extremely heavy and dangerous, so take every precaution in avoiding injury. Concrete also contains silicates, released in dust during demolition, which are proven harmful when inhaled. Dust masks, gloves, and full clothing is recommended whenever working with concrete .
Cutting
Removal usually starts with a cut. This is accomplished with a concrete wall-saw equipped with a diamond blade. These saws, which typically use a gasoline/oil mix for fuel, have replaced jackhammers as the primary tool in removing concrete because they leave clean edges (great for cutting out doors, windows, and other openings) and can cut through steel reinforcements inside the concrete.
Read the full article in the CalFinder Remodeling and Home Solar Power Magazine
