In the heat of the concrete

It also "retains" cold. :-)

Maybe it is curing from excessive humidity and should be junked

Read about building the Hoover dam. The curing concrete created so much heat they had to turn air conditioners on it in order to get it to set properly.

I can remember, about 30 years ago, when building a house, I went to a building materials supplier - these are the guys who supply masonry materials to the trades - to pick up some Portland and mortar mixes.

I helped to load it into the pickup from their storage shed which contained several hundred bags. It was all hot when lifted from the pile. This is why it doesn't last long when stored, particularly as a single bag in an area with some dampness. The moment it is made, it starts absorbing moisture and curing. It really does have a short shelf life.

Red wrote: ...

I understand it took over three years of pumping cool water though it to help it cure. Concrete gives off heat as it cures.

I thought of that. I was being an optimist based on what the OP wrote. You could be right however.

North East Pa? NEPAl? Nappa? I don't think I've heard of NEPA.

One show about the dam (iirc); tells, that had they not taken action to assist the curing it would take 300 years for the concrete to cure.

The new by-pass bridge just below the dam is now said to have the largest single pour in the world.

-- Oren

..through the use of electrical or duct tape, achieve the configuration in the photo..

AIUI, the Panama Canal is still curing.

I hope the concrete does better :-))

-- Oren

..through the use of electrical or duct tape, achieve the configuration in the photo..