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08320 Specimen Type and Test Protocol for Corrosion Performance Characterization of Reinforced Concrete Marine Pilings

Picture for 08320 Specimen Type and Test Protocol for Corrosion Performance Characterization of Reinforced
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Product Number: 51300-08320-SG
ISBN: 08320 2008 CP
Author: William H. Hartt and Russell Tanner
Publication Date: 2008
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$20.00
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Sea water induced reinforcing steel corrosion is often service life limiting for concrete bridge pilings in marine environments. In the present research, a novel piling type specimen assembly and test protocol were developed to simulate performance of actual substructure elements undergoing marine exposure. Specimen mix design was based on the mortar component of a high performance concrete, both with and without fly ash. Exposures involved partial submergence in 15 w/o NaCl and in some cases periodic spraying of the above waterline zone to simulate splash. The rebar of some specimens was connected to submerged bare steel such that the lower portion of the simulated piling rebar was cathodically polarized, and it is demonstrated that the resultant potential profile was similar to that of actual marine pilings. Threshold Cl- concentrations to initiate corrosion, CT, are reported for various test conditions as is a correlation between CT and potential.
Sea water induced reinforcing steel corrosion is often service life limiting for concrete bridge pilings in marine environments. In the present research, a novel piling type specimen assembly and test protocol were developed to simulate performance of actual substructure elements undergoing marine exposure. Specimen mix design was based on the mortar component of a high performance concrete, both with and without fly ash. Exposures involved partial submergence in 15 w/o NaCl and in some cases periodic spraying of the above waterline zone to simulate splash. The rebar of some specimens was connected to submerged bare steel such that the lower portion of the simulated piling rebar was cathodically polarized, and it is demonstrated that the resultant potential profile was similar to that of actual marine pilings. Threshold Cl- concentrations to initiate corrosion, CT, are reported for various test conditions as is a correlation between CT and potential.
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