Abstract
One of the leading reasons for failure of structural members is corrosion of reinforcement. Structures corresponding to the marine environment like ports, harbours and bridges are more susceptible towards the risk of corrosion. Chlorides are one of the main reasons for the initiation of corrosion which can penetrate from various sources like the marine atmospheric environment or the use of deicing salts in the colder regions. Corrosion is a long-term process, so, in this research, an accelerated corrosion testing of self-compacting mortar has been performed to understand the behaviour of addition of fly ash in the mortar mixes against the chloride induced corrosion. Mix design of self-compacting mortar was done through the effective cement replacement or k-factor theory based on the concept of equivalent 28 days strength. Altogether 12 mixes have been casted, 6 for each effective w/c of 0.44 and 0.5 with variation in the fly ash incorporation in the mixes (0-55%). Accelerated corrosion test using impressed current technique is used for the evaluation of corrosion resistance of mortar for which the centrally embedded reinforced (rebar of diameter 12 mm and length 200mm) mortar sample having diameter of 100mm and height 200 mm is casted. Testing of mortar samples are performed after 28 days of curing.
Keywords
corrosion, effective w/c, k-factor, impressed current technique.
DOI
10.5703/1288284318141
Recommended Citation
Haque, Md Marghoobul and Gupta, Supratic, "Investigation of Corrosion Resistance of Fly ash Self-compacting Mortar" (2025). International Conference on Durability of Concrete Structures. 4.
https://docs.lib.purdue.edu/icdcs/2025/ddm/4
Investigation of Corrosion Resistance of Fly ash Self-compacting Mortar
One of the leading reasons for failure of structural members is corrosion of reinforcement. Structures corresponding to the marine environment like ports, harbours and bridges are more susceptible towards the risk of corrosion. Chlorides are one of the main reasons for the initiation of corrosion which can penetrate from various sources like the marine atmospheric environment or the use of deicing salts in the colder regions. Corrosion is a long-term process, so, in this research, an accelerated corrosion testing of self-compacting mortar has been performed to understand the behaviour of addition of fly ash in the mortar mixes against the chloride induced corrosion. Mix design of self-compacting mortar was done through the effective cement replacement or k-factor theory based on the concept of equivalent 28 days strength. Altogether 12 mixes have been casted, 6 for each effective w/c of 0.44 and 0.5 with variation in the fly ash incorporation in the mixes (0-55%). Accelerated corrosion test using impressed current technique is used for the evaluation of corrosion resistance of mortar for which the centrally embedded reinforced (rebar of diameter 12 mm and length 200mm) mortar sample having diameter of 100mm and height 200 mm is casted. Testing of mortar samples are performed after 28 days of curing.
