Z17 Tremie Concrete for Deep Foundations

This Recommended Practice provides guidance for those involved in the preparation of specifications for the use of tremie concrete in the field of construction of cast in place foundations, in particular for bored piles and diaphragm walls.

Currently Australian Standards do not cover the special requirements for the mix design or the properties of tremie concrete with respect to its specific field of application, e.g. placed under a drilling fluid or under water.

In regards to the performance properties of tremie concrete, special attention should be given to the fact that the workability required has to be achieved and maintained under considerable hydraulic pressure and for the total time span from first batching until the last working step, such as the withdrawal of a temporary casing of a bored pile or the installation of a plunged column as reinforcement into the fresh concrete pile.