Study of the Joule effect on rapid chloride permeability values and evaluation of related electrical properties of concretes

摘要

Concrete specimens were tested at different temperatures using the ASTM C1202 rapid chloride permeability test (RCPT). The influence of temperature on the RCPT results was analyzed and activation energies were calculated. An Arrhenius equation was presented to account for the Joule effect due to heating. Electrical properties of concrete derived from the test were evaluated and correlations were explained based on the effect of temperature on the kinetics of the pore fluid and on the microstructure of concrete. The results support the modification of ASTM C1202 by changing it to a 1-min conductivity test.