How made the Concrete Rings
Have a look how they made
the cement and water are precisely mixd together
the metal ring part is place in the mould before the cement is added
the cement is inserted and tapped to remove air pockets
the cement is left to set for 2 days
then the ring is sanded clean and the metal is polished
the ring is then kept wet for 20 days
the cement and water are precisely mixd together
the metal ring part is place in the mould before the cement is added
the cement is inserted and tapped to remove air pockets
the cement is left to set for 2 days
then the ring is sanded clean and the metal is polished
the ring is then kept wet for 20 days