189 TABLE 405.12.1 Type Layer Asphalt Emulsion (gal/SY) Aggregate (lb/SY) Gradation Type Light First 0.15 to 0.25 8 to 10 C Single First 0.25 to 0.40 15 to 25 B Double First 0.25 to 0.40 25 to 35 B Second 0.25 to 0.35 10 to 20 C Triple First 0.30 to 0.50 25 to 45 A Second 0.30 to 0.50 25 to 35 B Third 0.25 to 0.35 10 to 20 C
405.13 Fog Seal :
Unless otherwise specified, a fog seal shall be applied on the final surface according to Section 407. This shall be done no less than three ( 3) but no more than seven ( 7) calendar days after the application of the Chip Seal. The surface must be dry before application, and the surface shall be swept to remove loose material. An asphalt emulsion shall be applied uniformly at a rate of 0.09 ± 0.03 gallons per square yard to the surface. Any raveled areas, flushed areas, or other defects in the chip seal shall be repaired prior to the application of the fog seal.
405.14 Testing and Acceptance :
405.14.1 Quality Control Testin g: Quality Control Testing: Quality Control is the
responsibility of the Contractor, as specified in subsection 106.1. The Contractor shall design and submit a quality control plan in accordance with applicable section of MP 307.00.50 detailing the meth ods by which the quality control program will be conducted.
405.14.2 Acceptance Testing: Acceptance for aggregate will be based on the uniformity
of the aggregate and the dust content. Samples shall be taken from the conveyor belt on the chip spreader in accordance with MP 700.00.06 or from the roadway in accordance with ASTM D5624. Samples may be split with the contractor. Sampling frequency shall be one sample for every lane mile per layer. This sample shall be the lot. Fractions of a mile less t han 0.5 will be included in the previous lot, and fractions of a mile greater than 0.5 will be a separate lot. Contractor must sample in presence of the Engineer.
405.14.2 1 -Acceptance of Aggregate Uniformity: The more uniform the material,
the better p erformance potential of the chip seal. Uniformity of the aggregate will be measured by the Coefficient of Uniformity, C u, as defined in ASTM D2487. Adjustments per lot will be as follows. TABLE 405.14.2.1 Adjustment of Contract Item Price for Aggregate Uniformity Cu Percent Adjustment <1.7 1% incentive per 0.1 below 1.7 – 3.0 No Adjustment 3.1 – 4.0 2% disincentive per 0.1 above >4.1 *Special evaluation to consider remove and replace