First Pier Tower: Formwork Being Removed

Things really ARE happening quickly with the project, as a fellow blogger commented on a previous post that included a photo snapped by Team Outreach before the formwork was removed.

Two of the new bridge's 86 vertical steel towers nr the Westchester side/NNYB Outreach

Two of the new bridge’s 86 vertical steel towers nr the Westchester side/NNYB Outreach

So fast, in fact, that I missed what happpened next. Maybe you missed it, too? Here’s part of the project update from November 20:

The piers begin as cages of galvanized steel bars, called rebar, around which formwork is built. Next, semi-liquid concrete is poured into the formwork, filling the empty space around the rebar cages before it begins to cure, or harden. The coloration of the partially-cured piers will lighten and become uniform as they harden over the coming weeks.

Supporting the road deck: new bridge piers/ Photo: New York State Thruway Authority

Supporting the road deck: new bridge piers/ Photo: New York State Thruway Authority

The concrete’s temperature is carefully monitored and maintained as it cures to ensure its full design strength is reached. Curing is a chemical process that produces heat, which is controlled by wetting down canvas that is draped over the concrete.

“Completing the first piers is a major milestone for the project,” TZC president Darrell Waters said.

“We have approximately 300,000 cubic yards of concrete to place on this job,” Waters told reporters during an August tour of the project site. As he said, it’s now “going vertical.”

I’d like to know what you think.

Copyright © Janie Rosman and Kaleidoscope Eyes 2014

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