Quote:
Originally Posted by JACKinBeantown
Thanks, TBA. What about the bluish/gray areas in the columns? Is that because the concrete hasn't completely dried yet?
|
This is a wild guess on my part, but the splotches of bluish discoloration seem to line up with the ribs on the forms; the metal forms could have acted as a heat sink, and caused different areas of the concrete to cure at different rates, since the rate that concrete cures at is affected by the temperature. The whiter areas are areas that were exposed to colder temperatures.
As for the cracks, I wouldn't worry about those ones two much because they are horizontal. As the tower is completed, the weight of the building will tend to force the cracks closed. As for resisting uplift caused by overturning moment from the wind, that is already intended to be carried by the rebar, not the concrete.