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Electrical resistivity of concrete - Part III: Long term field measurements on concrete elements in the tidal zone



Title: Electrical resistivity of concrete - Part III: Long term field measurements on concrete elements in the tidal zone
Author(s): C.K. Larsen, J-M. Østvik, E.J. Sellevold, Ø. Vennesland
Paper category : conference
Book title: 2nd International RILEM Symposium on Advances in Concrete through Science and Engineering
Editor(s): J. Marchand, B. Bissonnette, R. Gagné, M. Jolin and F. Paradis
Print-ISBN: 2-35158-003-6
e-ISBN: 2351580028
Publisher: RILEM Publications SARL
Publication year: 2006
Nb references: 10
Language: English


Abstract: Beams made with a variety of high performance concretes, and with embedded electrodes to measure resistivity, were produced in a full scale plant. The beams were exposed on the West-coast of Norway so that one electrode pair was in a part of the beam always submerged in sea-water, one pair in the tidal zone and one pair always above the sea-water.
The resistivity of all concretes was measured periodically over an eight year period, either by an automatic monitoring system at 100Hz or manually with a hand-held device at 1000Hz. The interplay of temperature- and water-level variations in a typical 24 hour period is analyzed with a view to eliminate the two effects on long term data. The goal is to determine the true resistivity development which is believed to be the main factor influencing on the rate of reinforcement corrosion.
The eight year development for the different concretes, each with the three different exposure conditions is discussed.

Keywords: concrete, resistivity, field exposure, monitoring, durability, corrosion


Online publication: 2006-08-02
Classification: 3.3 Theme 3: Monitoring, Repair and Maintenance of Concrete Structures
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2351580028.101