11831 AIRPORT RD WHOLE SITE FILE 2020-01-21

5-06.3(9) Subgrade Preparation and Subbase Prepare and protect subgrade in accordance with Section 2-06. Prepare and protect subbase in accordance with Section 4-04. 5-06.3(10) Placing, Spreading, Finishing, Edging, Tolerances and Curing Pervious concrete shall not be placed, compacted or finished when the natural light is inadequate, unless an adequate lighting system is in operation. The adequacy of light will be determined by the Engineer. Wet the surface of the subbase with water immediately before placing pervious concrete. Deposit concrete either directly from the transporting equipment or by conveyor on the subbase, unless otherwise specified. Pervious concrete shall not be placed on frozen subbase. Deposit concrete between the forms to an approximately uniform height. Spread the concrete using mechanized equipment or hand tools. Vibrating equipment shall not be used for spreading pervious concrete. Strike off concrete between forms using a form-riding paving machine, roller screed, or spinning screed. Compact concrete to a uniformly dense structure without clogging the surface with paste. Finish the pervious concrete to a uniform, open-textured surface to match the appearance of the approved JMF test panel. Edges shall be hand tooled to a radius of'/4 inch. Curing materials for pervious concrete shall be in place no more than 20 minutes of discharge onto the subbase. The pavement surface and all exposed edges shall be completely covered with sheet curing materials conforming to Section 9-23.1. The curing material shall secured at all exterior edges and interior laps without damaging the pervious concrete. The method of securing the curing material shall prevent wind from removing the sheet and from blowing under the sheet across the surface of the concrete. Cure the pavement for a minimum of seven (7) uninterrupted days. All traffic (foot and vehicular), staging, stockpiling or other work shall be kept off of the pervious concrete pavement during the curing period. Any testing for acceptance shall not occur until the end of the curing period. Protect concrete from freezing and cold weather in accordance with 5-06.3(12). 5-06.3(10)A Contractor's Qualifications The contractor shall employ no less than one (1) National Ready Mixed Concrete Association (NRMCA) certified Pervious Concrete Craftsman for each crew, who must be on site, over- seeing the work during all pervious concrete placement; or employ no less than three (3) NRMCA Certified Pervious Concrete Installers per crew, who must be on site working during each pervious concrete placement. The minimum number of certified individuals must be present on each crew for every pervious concrete placement, including the test panel placements, and a certified individual must be in charge of the placement crew and procedures. Swift Green Line—Corridor Stations Special Provisions SP84 May 2017