All correspondence must be made through the Vendor Portal. Specifications include, but are not limited to: Schedule Information: 6” x 8’ long concrete planks Concrete: Cement, 658#/cubic yard, to yield 5000 P.S.I. in 28 days. ¾ Stone, 1600#+/cubic yard. Concrete Sand, 1350#+/cubic yard. Air Entrainment Agent, Daravair, or equal, 7-oz.+/cubic yard to yield 5-7% air content. Water, 30-31 gals/cubic yard to yield .40 w/c ratio. Water Reducer, WRDA #19, or equal, as required. Only Non-Chloride Admixtures may be used. Casting Date: Clearly marked on end of each plank. Curing Concrete: Water cured for three days beginning immediately after concrete placement. Form Removal: Min. 1500 PSI concrete, before forms are removed, however, forms shall not be removed sooner than 18 hours following concrete placement. Reinforcing Steel: Deformed ASTM A615 grade #60. Connecting Bars: ASTM A36 steel. Quality: Finished concrete planks shall represent good workmanship with clean, neat surfaces and grooves; and be free of honeycomb and cracks. Concrete shall not be cast during the months of December, January & February
