So! to recap the curing process
● The curing process lasted ten days.
● The hypertufa was kept moist at all times.
● The hypertufa was covered with plastic sheet to prevent evaporation.
● The hypertufa got hot at times, but that did not matter.
● The cover was lifted once or twice a day to ensure all was moist and to spray again.
● On day four the slurry was added.
● The cover was put back on and lifted once or twice a day to ensure all was moist and to spray again, and so on until the end of the curing period (day 10)
Note: Maybe the above curing procedure could have been a bit of an overkill, but it certainly worked.
Off with the formwork
That was easy enough to do: just a matter of undoing a few screws.
The form broke away cleanly because we had applied release agent to the form prior to pouring the hypertufa.
It was pleasing to see how the slurry-coated hypertufa looked at the end of the cure period and after the form was taken off. A successful pour.
Although the curing period took ten days, the time wasn't wasted. I wasn't sitting around for ten days scratching my nose waiting for the curing period to finish. I was getting on with other sections of the project.
Next on the agenda: The head side-covers and the crown