Precast concrete planks, 2012, richmond

The State of Maine's Boating Facilities Division is soliciting bids for 220 precast concrete planks measuring 6 inches by 12 feet, with bids due June 15, 2012 and delivery to commence by August 31, 2012.

The concrete specification is detailed and performance-driven: 658 pounds of cement per cubic yard, 1,600 pounds stone aggregate, 1,350 pounds concrete sand, and 30–31 gallons water per cubic yard to achieve 5,000 PSI compressive strength within 28 days and a 0.40 water-cement ratio. Reinforcement consists of deformed ASTM A615 grade 60 steel and ASTM A36 connecting bars. Concrete curing requires three days of water curing immediately following placement; forms cannot be removed until minimum 1,500 PSI strength is achieved, but no sooner than 18 hours after placement. Casting is prohibited December through February. Planks must be marked with casting date and exhibit clean, neat surfaces free of honeycomb and cracks. Non-chloride admixtures only; air-entrainment agent (Daravair or equivalent) required for 5–7 percent air content.

Delivery location is the Boating Facilities Division Area at Route 201, 1009 Brunswick Road, Richmond, Maine. Deliveries must occur at least monthly throughout the delivery period; no palletized deliveries are permitted. All costs for delivery and placement into stockpiles are the supplier's responsibility. Inspection occurs at the point of delivery. The supplier must remove any rejected planks at no cost to the buyer. Questions and answers addressing bidder inquiries on specifications, qualifications, insurance, pricing, and compliance procedures are available in the Questions and Answers document posted June 1, 2012.