Localized cathodic protection of simulated prestressed concrete pilings in sea water

Book · Sat Dec 31 04:00:00 EST 1994

OSTI ID:80072

Hartt, W H; Chaix, O ^[1]; Kessler, R J; Powers, R ^[2]

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1. Florida Atlantic Univ., Boca Raton, FL (United States). Center for Marine Materials
2. Florida Department of Transportation, Gainesville, FL (United States). Office of Materials and Research

Corrosion induced deterioration of prestressed concrete pilings in sea water has been established as the predominant failure mode for structures in coastal Florida waters, and a technology involving localized impressed current cathodic protection of the splash zone region in association with conductive rubber anodes has been developed to mitigate this. In the present research a series of experiments involving simulated prestressed concrete piling specimens partially immersed in sea water while cathodically protected has been performed. Variables included (1) concrete mix design, (2) specimen cross section, (3) anode dimensions and (4) water level relative to the anode. An interactive aspect of cathodic protection operating parameters in association with water level was identified as important to avoid excessively negative potentials which might cause tendon embrittlement. An evaluation of the data was incitive with regard to the interrelationship between depolarization magnitude, potential and level of protection; and this was determined to be a function of moisture content within the concrete. The results are discussed within the context of prestressed concrete bridge piling cathodic protection.

• OSTI ID: 80072
• Report Number(s): CONF-940222--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
CATHODIC PROTECTION
CHLORIDES
CONCENTRATION RATIO
CORROSIVE EFFECTS
ELECTRIC POTENTIAL
EXPERIMENTAL DATA
FOUNDATIONS
PARAMETRIC ANALYSIS
PRESTRESSED CONCRETE
REINFORCED CONCRETE
SAMPLE PREPARATION
SEAWATER