Back, finally,  to casting the second side of my arch bridge, so to bring things up to date, here are a few shots of the mold and initial pour.

Wood & Sintra mold with steel wire re-enforcing rods

Starting pour

Pouring Hydrocal in a hurry – sets quick

and leveling off

Leveling Hydrocal

Then back to the present starting the second pour

original cast and second pour

Both casts with spacer cut from 3/4 inch Sintra (expanded closed cell PVC sheet)

I’ll continue detailing and assembly in the next post