EFFC/DFI Derin Temeller İçin Tremi Betonu Rehberi

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This is the 2nd edition guide for June 2018 providing authoritative guidance on the placement and testing of tremie concrete in deep foundations.

It is intended that the guide is used by contractors and concrete suppliers to improve the quality of concrete used in deep foundations. Historically there has been limited research and understanding about how concrete behaves in the ground, which has led to problems onsite as concrete mixes became more complex with the addition of admixtures, additives, aggregates etc.

The new edition incorporates field studies of concrete taken from construction sites in Europe and the US to provide an empirical testing criteria for the acceptability of fresh concrete. The guide’s data has been collected by the Technical University of Munich and the Missouri University, using an agreed methodology that includes a range of onsite and laboratory testing.

The guide now has recommendations on which tests should be used to determine the workability of the concrete. This is particularly useful on site, where construction teams can determine with a high degree of accuracy whether the concrete will work as intended within the pile or diaphragm wall.

In addition, the Guide incorporates work that numerically models the behavior of concrete when it is poured into an excavation. This is a new area of research which provides new insight into what is occurring during the tremie operation.

The Guide is a collaboration between the DFI in the US and the EFFC, and is a piece of work that is intended to benefit the global deep foundations industry.

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