19 June 2001
b. Use rounded coarse (10 mm (2/5 inch) minimum) aggregate when
c. Sand should have a higher proportion of finer sizes.
d. Avoid porous aggregates such as expanded clay, foamed slag, and
Placement: The principles of placing tremie concrete apply. Also:
a. Before filling hopper, lubricate the pipe with water, then a cement-
b. Take all precautions to avoid separation of the mix.
c. Always keep discharge buried in the fresh concrete.
d. Control discharge to keep lateral flow of concrete within 0.7 to 1
Curing: Not applicable underwater. If above water, use wet burlap for 7 days or
use a curing compound.