A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
High Performance Concrete and Drilled Shaft Construction
Drilled shaft foundations on major bridge projects often require the use of underwater placement of large volumes of concrete through densely placed rebar, with the cage often made even more congested with the placement of additional tubes for post-construction integrity testing. Such conditions represent the most difficult circumstances for constructors in terms of concrete placement to achieve a shaft which is free of defects or anomalies in the integrity testing. The concept of "high performance" for drilled shaft concrete is that the mixture should address the most critical performance requirements related to workability. This paper describes the important considerations in concrete mixture design for drilled shaft construction including the use of admixtures and mixture components associated with self-consolidating concrete (SCC). Some case histories of difficulties associated with concrete are also described.
High Performance Concrete and Drilled Shaft Construction
Drilled shaft foundations on major bridge projects often require the use of underwater placement of large volumes of concrete through densely placed rebar, with the cage often made even more congested with the placement of additional tubes for post-construction integrity testing. Such conditions represent the most difficult circumstances for constructors in terms of concrete placement to achieve a shaft which is free of defects or anomalies in the integrity testing. The concept of "high performance" for drilled shaft concrete is that the mixture should address the most critical performance requirements related to workability. This paper describes the important considerations in concrete mixture design for drilled shaft construction including the use of admixtures and mixture components associated with self-consolidating concrete (SCC). Some case histories of difficulties associated with concrete are also described.
High Performance Concrete and Drilled Shaft Construction
Brown, Dan (author) / Schindler, Anton (author)
Geo-Denver 2007 ; 2007 ; Denver, Colorado, United States
2007-10-14
Conference paper
Electronic Resource
English
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