Christine de Beer - effortless floral craftsman
Casting wet cement to have surface cracks
The goal is to cast the cement in such a way that the surface of the cement dries faster than the sub-surface cement.
Mix up a batch of cement according to the container specifications
Scoop out the cement into a bowl, tray or mould
Scrape the cement flat
Place the tray on a flat working surface. Lift the cement tray...
And let it drop. This releases any air bubbles stuck in the cement
Continue to lift...
and drop the tray until you no longer see any air bubbles rise to the surface.
Scrape the surface flat.
Place your hand in water and sprinkle to water on to the cement tray
Cover the cement tray with plastic and set aside to let the water soak in.
Wait until the water is no longer visible on the surface.
Open the concrete tray and place in a warm, dry area. It normally takes concrete from 5 to 7 days to cure.
It is important to let the cement dry out as fast as possible.
If the surface of the concrete dries faster than the bottom layers, the water from the wet cement will break through the surface and crack the top layer.
The very bottom of the cement tray should dry normal and the cracks will not weaken the structure.
Remove the concrete from the tray
There are no cracks in the bottom of the cement tray...
... but the surface has beautiful cracks ready to fill with moss (see Tutorial below)
This time of year is best for starting a moss garden. It needs to be cool and wet. Lichen and moss becomes dormant when it is too hot and dry.