Long-Term Corrosion Behavior of Reinforced Concrete: Impact of Supplementary Cementitious Materials and Reservoir Size Under Accelerated Chloride Ingress
This study investigates the long-term corrosion behavior of reinforced concrete (RC) under accelerated chloride exposure for about 1600 days, using electrochemical methods like galvanostatic pulse (GP) testing. Two concrete mixes (T1 and T2), incorporating distinct supplementary cementitious materia...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-05-01
|
| Series: | Construction Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2673-7108/5/2/33 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850156896519979008 |
|---|---|
| author | Kazi Naimul Hoque Francisco Presuel-Moreno |
| author_facet | Kazi Naimul Hoque Francisco Presuel-Moreno |
| author_sort | Kazi Naimul Hoque |
| collection | DOAJ |
| description | This study investigates the long-term corrosion behavior of reinforced concrete (RC) under accelerated chloride exposure for about 1600 days, using electrochemical methods like galvanostatic pulse (GP) testing. Two concrete mixes (T1 and T2), incorporating distinct supplementary cementitious materials (SCMs), were evaluated to determine their performance in aggressive environments. Specimens with varying reservoir lengths were exposed to a 10% NaCl solution (by weight), with electromigration applied to accelerate chloride transport. Electrochemical assessments, including measurements of rebar potential, concrete solution resistance, concrete polarization resistance, corrosion current, and mass loss, were conducted to monitor the degradation of embedded steel. The findings revealed that smaller reservoirs (2.5 cm) significantly restricted chloride and moisture penetration, reducing corrosion, while larger reservoirs (10 cm) resulted in greater exposure and higher corrosion activity. Additionally, T1 mixes (partial cement replacement with 20% fly ash and 50% slag) showed higher corrosion currents and mass loss, whereas T2 mixes (partial cement replacement with 20% fly ash and 8% silica fume) demonstrated enhanced matrix densification, reduced permeability, and superior durability. These results underscore the importance of mix design and exposure conditions in mitigating corrosion, providing critical insights for improving the longevity of RC structures in aggressive environments. |
| format | Article |
| id | doaj-art-9ad4c47932ff498a95d4bd607b775bc6 |
| institution | OA Journals |
| issn | 2673-7108 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Construction Materials |
| spelling | doaj-art-9ad4c47932ff498a95d4bd607b775bc62025-08-20T02:24:21ZengMDPI AGConstruction Materials2673-71082025-05-01523310.3390/constrmater5020033Long-Term Corrosion Behavior of Reinforced Concrete: Impact of Supplementary Cementitious Materials and Reservoir Size Under Accelerated Chloride IngressKazi Naimul Hoque0Francisco Presuel-Moreno1Department of Naval Architecture and Marine Engineering, Bangladesh University of Engineering and Technology (BUET), BUET Central Road, Dhaka 1000, BangladeshDepartment of Ocean & Mechanical Engineering, Florida Atlantic University (FAU), 101 North Beach Road, Dania Beach, FL 33004, USAThis study investigates the long-term corrosion behavior of reinforced concrete (RC) under accelerated chloride exposure for about 1600 days, using electrochemical methods like galvanostatic pulse (GP) testing. Two concrete mixes (T1 and T2), incorporating distinct supplementary cementitious materials (SCMs), were evaluated to determine their performance in aggressive environments. Specimens with varying reservoir lengths were exposed to a 10% NaCl solution (by weight), with electromigration applied to accelerate chloride transport. Electrochemical assessments, including measurements of rebar potential, concrete solution resistance, concrete polarization resistance, corrosion current, and mass loss, were conducted to monitor the degradation of embedded steel. The findings revealed that smaller reservoirs (2.5 cm) significantly restricted chloride and moisture penetration, reducing corrosion, while larger reservoirs (10 cm) resulted in greater exposure and higher corrosion activity. Additionally, T1 mixes (partial cement replacement with 20% fly ash and 50% slag) showed higher corrosion currents and mass loss, whereas T2 mixes (partial cement replacement with 20% fly ash and 8% silica fume) demonstrated enhanced matrix densification, reduced permeability, and superior durability. These results underscore the importance of mix design and exposure conditions in mitigating corrosion, providing critical insights for improving the longevity of RC structures in aggressive environments.https://www.mdpi.com/2673-7108/5/2/33supplementary cementitious materialsreservoir lengthelectromigrationcorrosion currentmass loss |
| spellingShingle | Kazi Naimul Hoque Francisco Presuel-Moreno Long-Term Corrosion Behavior of Reinforced Concrete: Impact of Supplementary Cementitious Materials and Reservoir Size Under Accelerated Chloride Ingress Construction Materials supplementary cementitious materials reservoir length electromigration corrosion current mass loss |
| title | Long-Term Corrosion Behavior of Reinforced Concrete: Impact of Supplementary Cementitious Materials and Reservoir Size Under Accelerated Chloride Ingress |
| title_full | Long-Term Corrosion Behavior of Reinforced Concrete: Impact of Supplementary Cementitious Materials and Reservoir Size Under Accelerated Chloride Ingress |
| title_fullStr | Long-Term Corrosion Behavior of Reinforced Concrete: Impact of Supplementary Cementitious Materials and Reservoir Size Under Accelerated Chloride Ingress |
| title_full_unstemmed | Long-Term Corrosion Behavior of Reinforced Concrete: Impact of Supplementary Cementitious Materials and Reservoir Size Under Accelerated Chloride Ingress |
| title_short | Long-Term Corrosion Behavior of Reinforced Concrete: Impact of Supplementary Cementitious Materials and Reservoir Size Under Accelerated Chloride Ingress |
| title_sort | long term corrosion behavior of reinforced concrete impact of supplementary cementitious materials and reservoir size under accelerated chloride ingress |
| topic | supplementary cementitious materials reservoir length electromigration corrosion current mass loss |
| url | https://www.mdpi.com/2673-7108/5/2/33 |
| work_keys_str_mv | AT kazinaimulhoque longtermcorrosionbehaviorofreinforcedconcreteimpactofsupplementarycementitiousmaterialsandreservoirsizeunderacceleratedchlorideingress AT franciscopresuelmoreno longtermcorrosionbehaviorofreinforcedconcreteimpactofsupplementarycementitiousmaterialsandreservoirsizeunderacceleratedchlorideingress |