When and How Should Chloride Profiles be Calibrated for Paste Fraction?

Abstract Due to stochastic and systematic variations in the paste fraction, data for total chloride content are occasionally calibrated using parallelly measured calcium as a measure of actual fraction − assuming non-calcareous aggregates no leaching. Data from concrete exposed at marine Fehmarn Belt Exposure Site questions latter assumption. In outer zone experiencing leaching (ten mm after ten years), errors will be introduced by calibration. To account wall effect, profiles cores taken before exposure might used correct systematically higher cast surfaces.