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Advances in Concrete Construction Volume 8, Number 1, August 2019, pages 39-45 DOI: http://dx.doi.org/10.12989/acc.2019.8.1.039 |
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Durability of CFRP strengthened RC beams under wetting and drying cycles of magnesium sulfate attack |
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Hamid Rahmani, Soha Alipour and Ali Alipour Mansoorkhani
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| Abstract | ||
| Durability of strengthened reinforced concrete (RC) beams with CFRP sheets under wetting and drying cycles of magnesium sulfate attack is investigated in this research. Accordingly, 18 RC beams were designed and made where 10 of them were strengthened by CFRP sheets at their tension side. Magnesium sulfate attack and wetting and drying cycles with water and magnesium sulfate solution were considered as exposure conditions. Finally, flexural performance of the beams was measured before and after 5 months of exposure. Results indicated that the bending capacity of the strengthened RC beams was reduced about 10% after 5 months of immersion in the magnesium sulfate solution. Wetting and drying cycles of magnesium sulfate solution reduced the bending capacity of the strengthened RC beams about 7%. Also, flexural capacity reduction of the strengthened RC beams in water and under wetting and drying cycles of water was negligible. | ||
| Key Words | ||
| durability; reinforced concrete beams; strengthening; CFRP; sulfate attack; wetting and drying cycles | ||
| Address | ||
| Hamid Rahmani: Civil Engineering Department, University of Zanjan, University Blvd., Zanjan, Iran Soha Alipour: Civil Engineering Department, Yasouj University, Daneshjoo Street, Yasouj, Iran Ali Alipour Mansoorkhani: Civil Engineering Department, Yasouj University, Daneshjoo Street, Yasouj, Iran | ||
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