Despite a low water-cement ratio (0.49) the concrete for this floor had a 7-inch slump thanks to a high-range water reducer.
One important requirement was that the mix have normal setting time; delayed setting concrete can lead to blisters and delamination.
Joints were saw-cut only at column lines and mid-bay, resulting in spacing of 30 feet.
A low-shrinkage mix was mandatory to minimize joints and ensure minimal cracking and curling.
This outstanding floor is the result of clear and current requirements for a long-term, high-performance industrial floor.
At the 12-month walk-through on this 1.4 million square foot building, only one 4-foot-long crack was found.