Asphalt grinding is necessary when overlaying a driveway or parking lot. Asphalt cracks with changes in temperature and use. Overlaying the asphalt adds a 1.5 to 2.5 inch layer over the top of the existing asphalt. Although this adds strength, it may create raised areas that will be tripping hazards or negatively affect drainage in the area. In these cases, the underlying asphalt must be ground down or removed before the overlay is added. There are a number of tools designed for use in asphalt grinding.
Examine your driveway and determine which raised areas need to be removed. The asphalt can buckle with moisture and temperature changes. Determine where drainage needs to be improved and mark these areas clearly with the sidewalk chalk.
Don your protective gear and put the asphalt grinding accessory onto your angle grinder. The angle grinder is suitable for small jobs like a driveway, but you will need to hire an asphalt grinder for larger jobs like parking lots.
Grind the asphalt around the raised area. Once you have cut around the asphalt, use the shovel to remove it. Place it in the wheel barrow and dispose of it responsibly.