Agenda - Council - 06/27/2017 - Laserfiche WebLink

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(1) Not take place before May 15 or after September 1. (2) Work only during daylight hours. (3) Start when the pavement and air temperature is 60 degrees F and rising. (4) Proceed only when the surface is dry or damp. There shall be no standing water. (5) No construction will be allowed in foggy weather. B. Road Surface Preparation - Clean all pavements to be seal coated. Sweep the pavement with a motorized broom to remove loose material. Clean depressions not reached by the power broom, using hand brooming. Cover iron (manholes, gate valve covers, catch basins, sensors, etc.) to prevent adherence of the bituminous material. Thermoplastic pavement markings shall be installed prior to sealcoating and covered during the sealcoating operation. All existing pavement markings shall be considered to be in good condition (unless noted otherwise by the Engineer) and shall be covered with a suitable material prior to sealcoating. Suitable covering includes plywood disks, sand, Kraft paper, roofing felt or other approved methods. Remove the protective coverings before opening the road to traffic. C. Application of Bituminous Material - Begin the rate of application for the bituminous material as determined by the seal coat design. Construct a test strip 100 feet long to ensure the bituminous material application rate is adequate. After applying the bituminous material to this test strip, place the seal coat aggregate at the design application rate. Inspect the aggregate in the wheel paths for proper embedment. Make adjustments to the rate of application if necessary. Construct one full lane width at a time. Make additional adjustments to the rate of application during the project, if needed. Apply the bituminous material at a minimum of 140 degrees F. D. Application of Seal Coat Areate - Prior to construction calibrate the aggregate spreader in accordance with ASTM D5624, in the presence of the Engineer. The allowable deviation in the amount of aggregate spread on each of the rubber mats shall not exceed ±0.5 square yard in the longitudinal direction from the design application rate. Provide uniformly moistened aggregates, which are damp at the time of placement. Immediately (within one minute) after the bituminous material has been sprayed, apply the aggregates. The speed of the spreader shall be such that the aggregates are not rolling over, and starting and stopping of the spreader is minimized. The edges of the aggregate applications shall be sharply defined. E. Ro11inz Operations - Complete the initial rolling within 2 minutes after applying the aggregate. Roll the aggregate at a speed no greater than 5 miles per hour to prevent turning the aggregate so the entire width of the treatment area is covered in one pass of all the rollers. The total compacting width of each pneumatic -tired roller shall exceed 5 ft. F. Protection of the Surface - No traffic is permitted on the seal coated road surface until after the specified rolling has been completed and the bituminous material has set and will not pick up on vehicle tires. SCTS 3