Abstract

The dual attack of chloride and sulphate ions is accompanied by the dynamic competitive interaction, yielding a non-negligible influence on their penetrations. Treating this interaction as a steady behaviour will underestimate the ionic ingress and then, overestimate the lifespan of concrete structures. In this study, the evolution of competitive interaction and the associated effect on the chloride diffusion and binding capacity have been investigated by comparing the exclusive chloride and the combined chloride-sulphate attacks. The experimental results disclose that the competitive interaction displayed a dynamic feature. Specifically, the competitive-induced depressions on chloride diffusion and binding capacity evolved first and then appeared to decay after reaching a threshold. Moreover, this competitive interaction was positively related to the w/c ratio and the environmental SO2-4/Cl- ratio. As the slag dosage increased from 0 % to 50 %, the competitive interaction-induced depression upon the free chloride content decreased steadily. However, the inhibition efficiency of the binding capacity decreased first as the slag dosage increased to 20 % and then, evolved significantly with the further increase through 20 % to 50 %. Furthermore, multifactor models are established with good applicability, to respectively predict the effect of this competitive interaction on the diffusion and binding of chloride ions.

Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.