Journal
CEMENT & CONCRETE COMPOSITES
Volume 34, Issue 8, Pages 936-945Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.cemconcomp.2012.04.009
Keywords
Chloride; Corrosion; Slag; Hydrotalcite; Friedel's salt; Silica fume
Ask authors/readers for more resources
This paper presents an investigation into the extent and reasons of the observed improvement in performance that ground granulated blast furnace slag (GGBFS) contributes against chloride initiated corrosion. Tests conducted on concretes with blended cement included Rapid Chloride Permeability Test (RCPT), long term ponding, corrosion current monitoring, pore size distribution and X-ray diffraction analyses. Values of the RCPT and corrosion current were significantly reduced as the proportion of GGBFS increased. The results showed only small refinements in pore size distribution, as well as indications of the formation of Friedel's salt. The tests however, revealed the formation of hydrotalcite as a significant hydration product in GGBFS blends. The results further demonstrated the efficiency of hydrotalcite in binding chloride ions. The authors attribute the reduction in corrosion current to the efficient binding of chloride ions by the hydrotalcite that forms in GGBFS hydration products. (C) 2012 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available