EXPERIMENTAL STUDY ON MODES OF CONCRETE CRACKING AND THRESHOLD AMOUNTS OF CORROSION FOR CRACK ONSET

Abstract

Correlation between reinforcing steel in concrete and concrete cracking was experimentally investigated in order to examine deterioration process of concrete structure due to chloride induced deterioration.
Cover depth and horizontal interval of reinforcing steel, modes of concrete cracking and threshold amounts of corrosion for crack onset, were considered for factors of the experiment. Concrete specimens for the experiment were measured by accelerated testing with chloride ion.
From the results of experiment, the correlations with cover depth, horizontal interval and mode of concrete cracking were quantitatively evaluated, and secondly, a larger amount of corrosion than that of typically using was proposed under the accelerated experiment.