One of the hopes for part of the renovation area is to leave the concrete waffle core of the building exposed. (The project manager from the Office of University Architects is, I suspect, a modernist like me.)

The challenge here was there was a reddish color to the concrete, a mix of red clay and a releasing agent. From when the concrete was poured. In 1968.

The contractors tried media blasting it with dry ice and it worked pretty well, so exposed concrete in the new classroom.

I am enjoying this process way too much …