The first step in repairing and resurfacing concrete floors and other paved areas is to prepare the surfaces properly so that new overlays or coatings can bond securely. All grinding disks use friction either to cut away surface irregularities much like a saw blade or to scrape the surface using an attachment that shears material from the surface.
Concrete grinders’ horizontally rotating cutting disks clean and smooth concrete surfaces. They are designed to:
Work on the top surfaces of large areas of concrete to remove old sealers, mastics, epoxy, urethane, paint, other coating materials and carpet backing
Clean buildup of industrial residues such as rubber, grease and fiberglass
Level high spots and uneven joints, generally when irregularity is no more than 1/16″
Grinder Dos & Don’ts
Grinding machines are powerful pieces of equipment. Address these safety and operational procedures before use in any area.
Never operate gasoline-powered grinders in unventilated areas.
Use only properly sized, grounded electrical cords on electric grinder models. Be sure power sources are adequate for the machine size.
Know your concrete’s psi rating. The type cup, disk or cutters needed depends on the hardness of the surface. Be aware, concrete hardens as it ages, and varies by region of the country.
Wear safety shoes, gloves, and ear and eye protection.
Properly ventilate inside projects. Dust may contain asbestos, silica or other dangerous materials. OSHA may require wearing masks or respirators.