The piece will hydrate for 5 days. If it dries too quickly the concrete will crack. I (actually we, Curtis helped me) build a cube out of pvc. I covered it in heavy sheets of plastic that I cut and sewed to fit the cube. I then installed two construction zippers to allow me to get in and check the humidity. I put a humidifier in the cube with the bench, the humidifier keeps the concrete very moist.
Today I started to prepare the dry ingredients so that I can mix the concrete tomorrow morning.
I prepared 30 lbs. of dry ingredients, 10 pounds of fly ash and 20 lbs. of white concrete. And then I panicked - is the piece in white concrete or is it in grey? With the fly ash mixed with the concrete and the piece being wet, I can not determine what color it is. Yikes! this is a problem. I decided to mix a second bucket of dry ingredients. Tomorrow I will be ready for anything.