Specifications include, but are not limited to: 1. Equipment: Grinding of PCC pavement shall be accomplished using diamond blades mounted on a self-propelled machine designed specifically for diamond grinding and texturing pavement. The equipment shall weigh a minimum of 35,000 pounds including the grinding head and be of a size that will grind a strip at least 4 feet wide in a single pass. The effective wheel base of the machine shall be no less than 12 feet. The effective wheel base is defined as the distance from the front wheel assembly transverse pivot point to the transverse pivot point of the profile/depth control/ground drive wheels. The equipment shall be such that it will not strain or damage the underlying pavement surface. Grinding equipment that causes raveling, aggregate fractures, spalls, or disturbance of the transverse or longitudinal joints shall not be permitted. The equipment shall have a positive means of vacuuming the grinding residue from the pavement surface, leaving the surface in a clean, near-dry condition. 2. Methods and Procedures: Substantially, the entire surface of the pavement shall be ground and textured until the surface of both sides of the transverse joints and cracks are within 1/16 inch on each side of the joint or crack. The finished texture shall be uniform. Extra depth grinding to eliminate minor depressions in order to provide texturing to the entire pavement surface is not required. Structures shall not be ground. The grinding shall be performed in a longitudinal direction. Grinding shall begin and end at lines normal to the pavement centerline at the project limits. Passes of the grinding head shall not overlap more than 1 inch. No unground surface area between passes will be permitted. The area ground shall not be left smooth or polished. Adequate cross slope drainage shall be maintained. Lateral drainage shall be achieved by maintaining a constant cross slope between grinding extremities in each lane. The finished cross slope shall match the pregrind cross slope.
