United States Department of Transportation
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Comparison of Conventional and Self-Consolidating Concrete for Drilled Shaft Construction : Research Project Capsule
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2012-09-01
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Edition:Research project capsule.
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NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-MaterialsNTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance
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Abstract:Signifi cant anomalies have been observed in many of the recently drilled shaft constructions
throughout Louisiana. The anomalies typically occur in the form of honeycombing within the
zones of heavy reinforcement or sometimes at the shaft bottom. Self-consolidating concrete
(SCC) has shown great potential to overcome the diffi culties noted in some pilot studies. As
an example, SCC was used in the drilled shafts for the Huey P. Long Bridge in New Orleans, La,
and performed satisfactorily. However, when conventional concrete was used for the Audubon
Bridge in Louisiana, problems were noted in the construction as well as the shaft resistance. Both
projects consist of large size shafts constructed in the Mississippi River under similar conditions.
One possible explanation for the diff erences in shaft performance is the concrete mixture design.
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