514DIAMOND GRINDING OF CONCRETE PAVEMENT

514.1DESCRIPTION—This work is the diamond grinding of existing cement concrete surfaces as indicated

or directed.

514.3CONSTRUCTION—

grinding the surface of the pavement to the specified smoothness tolerances and texture. Do not use equipment that causes spalls at joints or cracks, or fractures the aggregate at the surface.

lines normal to the pavement centerline , unless otherwise specified . Grind in either direction unless it is otherwise determined by the Representative traffic safety considerations mandate grinding with traffic flow. Provide a uniform finished surface and eliminate joint or crack faults. Operate the grinding machine parallel to centerline. Texture the entire pavement surface; however, do not perform extra depth grinding to eliminate minor depressions. Do not exceed 2 inches of overlap. Do not grind within 2 feet of existing curb, bridge barrier, and roadway barrier. Newly sealed longitudinal or transverse joints damaged because of the diamond grinding operation will be resealed as specified in Sections 512 and 521 at no additional cost to the Department. A newly sealed joint will be defined as a joint sealed under the current contract. Remove slurry or residue resulting from the diamond grinding in a continuous operation. Do not allow slurry to flow across lanes occupied by traffic or to flow into gutters or other drainage facilities. Clean the pavement surface after diamond grinding and before opening to traffic.

wide with a “land area” between grooves of 0.060 inch to 0.110 inch and a difference between the peaks of the ridges and the bottom of the grooves of approximately 1/16 inch.

Check the uniformity of cross slope at 100-foot intervals longitudinally. Correct all areas with deviations greater than 1/4 inch in 12 feet. Provide a positive cross slope so the pavement drains. Provide the Representative with documentation recording each cross -slope test location and the maximum depth of depression or slope misalignment at that location.

longitudinal roughness tests. Test the pavement surface roughness in the longitudinal direction and submit the record of the information to the Representative before beginning any diamond grinding work. Following grinding of the pavement surface, test the longitudinal roughness as specified in Section 507.3(c)1. Regrind pavement segments as specified in Section 507.3(d).

patching, concrete spall repair, dowel retrofit, slab stabilization, and slab jacking must be completed before the start of any diamond grinding operations. After completing the concrete rehabilitation operation, determine the ride quality of the existing pavement as specified in Sections 507.3(a) and 507.3(b), before performing any diamond grinding. After completing the diamond grinding operations, reevaluate the ride quality of the pavement surface as specified in Sections 507.3(a) and 507.3(b). Use the same pavement surface profile measuring equipment to perform all ride quality evaluations on the project. After diamond grinding the pavement surface, provide a maximum IRI of 70 in/mile for facilities if posted speed limits are greater than 45 miles per hour, and a maximum IRI of 90 in/mile for facilities if posted speed limits are less than or equal to 45 miles per hour. Meet these requirements in all IRI lots where diamond grinding of the pavement was performed to receive payment.

beginning ride quality limit and continuing to the ending ride quality limit for each pavement lane and ramp 12 feet or wider. Do not include the length of excluded areas in the 528 feet. Excluded areas will consist of: bridge decks, ramps less than 1,500 feet in length, tapered pavements less than 12 feet wide, partial lots less than 100 feet in length, shoulders, medians, existing pavement depressions identified as not corrected under the current contract and other pavement surfaces as indicated.

514.4MEASUREMENT AND PAYMENT—Square Yard

The determination of longitudinal roughness and the determination of ride quality are incidental to this item. No ride quality incentive will be paid for diamond grinding on concrete pavement rehabilitation projects.