CONCRETE IN CHLORIDE ENVIRONMENT: COMPARISON OF RAPID ELECTROCHEMICAL TEST METHODS
DOI:
https://doi.org/10.11113/mjce.v29.15587Keywords:
Constructed wetland, Domestic wastewater, Vertical subsurface, Rapid chloride migration, two-cell tests, concrete durability.Abstract
This study investigates chloride durability of concrete prepared with Portland cement and binary additions consisting pozzolanic (Fly ash) and latent hydraulic (Ground Granulated Blast furnace Slag - GGBS) mixes and also with limestone powder. Specimens were subjected to electro-chemical rapid chloride migration tests of two different kinds, namely, Potential Difference (PD) and Multi-Regime (MR) tests. Both the tests measure chloride durability in terms of D, the Coefficient of Chloride Diffusion. The PD and MR test results show that in the early ages, 100% Portland cement concrete performed well against chloride diffusion. However, fly ash and GGBS concrete showed higher resistance against chloride migration at later stage. At equal strength grade, w/c ratio and age, GGBS concrete had the highest resistance against chloride among other cement types.References
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