Abstract
The studies on chloride induced corrosion of steel bars in alkali activated slag (AAS) concretes are scarcely reported in the past. In order to make this issue clearer and compare the corrosion performance of AAS with Portland cement (PC) counterpart, an investigation was carried out and the results are reported in this paper. Corrosion properties were assessed with the help of rate of corrosion, electrical resistivity and pore solution chemistry. It was found that: (i) steel corrosion resistance of the AAS concretes was comparable or in some cases even worse than that of Portland cement (PC) concrete under intermittent chloride ponding regime; (ii) the corrosion behaviour of the AAS concretes was significantly influenced by ionic exchange, carbonation and sulphide concentration; (iii) the increase of alkali concentration of the activator generally reduced chloride resulting corrosion, and a value of 1.5 was found to be an optimum modulus for the activator for improving the corrosion resistance.
| Original language | English |
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| Publication status | Published - 19 Dec 2015 |
| Event | 2nd R.N. Raikar International Conference and Banthia-Basheer International Symposium - Mumbai, India Duration: 18 Dec 2015 → 19 Dec 2015 |
Conference
| Conference | 2nd R.N. Raikar International Conference and Banthia-Basheer International Symposium |
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| Country | India |
| City | Mumbai |
| Period | 18/12/2015 → 19/12/2015 |
Keywords
- chloride diffusivity
- alkali activated slag
- rate of corrosion
- bulk electrical resistivity
- pH Profiles
- pore solution chemistry
ASJC Scopus subject areas
- Ceramics and Composites
- Civil and Structural Engineering