Need to build a 1.5 metre wide 75cm tall brick wall in a gently flowing stream. Can I use a standard 3:1 sand cement mix for this and allow it to set slowly under water? I was thinking of erecting a board on the downstream side for a few days to support the wall (which would be 3 or 4 bricks wide, not single brick) and stop wash-out.
Could one of you experts out there please advise. Tx.
Could one of you experts out there please advise. Tx.