Relationship between Alumina and Chloride content on their physical and corrosion resistance properties of concrete
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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| Title |
Relationship between Alumina and Chloride content on their physical and corrosion resistance properties of concrete
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| Creator |
Thangavel, K.
Muralidharan, S. Saraswathy, V. Ann, K.Y. Balamurugan, L. |
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| Subject |
Corrosion Science and Engineering
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| Description |
The relationship between alumina and chloride content on the physical and corrosion resistance properties of
OPC concrete was studied. Friedel’s salt was formed in situ in OPC concrete by the addition of various percentages
of alumina (1% to 15%) along with 1% CaCl2. The compressive strength data revealed that the addition of Al2O3
increased the early strength of concrete. The Friedel’s salt formation up to 5% Al2O3 showed maximum compressive
strength. The Rapid Chloride Ion Permeability Test (RCPT) revealed that the quantity of electrical charge passed for
OPC concrete at 5% Al2O3 showed a 50% reduction in coulombs. The 12V impressed voltage test indicated a
gradual increase in anodic current flow and delayed time taken for initial crack up to 5% Al2O3 addition. Potential vs
time data from macrocell corrosion studies maintained the passivity of steel embedded in OPC concrete up to 5%
Al2O3 throughout the exposure period of 12 months. Correspondingly, the macrocell current was also considerably
reduced (50%) in OPC concrete at the 5% Al2O3 level. Scanning electron micrographs revealed a denser formation of
Friedel’s salt at the 5% Al2O3 level. The XRD pattern at the 5% Al2O3 level also confirmed the existence of a greater
amount of Friedel’s salt. The optimum percentage of alumina for the formation of Friedel’s salt in OPC concrete
with improved properties was found to be 5%.
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| Date |
2010
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/160/1/2010-009.pdf
Thangavel, K. and Muralidharan, S. and Saraswathy, V. and Ann, K.Y. and Balamurugan, L. (2010) Relationship between Alumina and Chloride content on their physical and corrosion resistance properties of concrete. The Arabian Journal for Science and Engineering, 35 (2B). ISSN 1319-8025 |
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| Relation |
http://cecri.csircentral.net/160/
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