Impact of elevated temperature, chemical and workmanship on performance of beams with near surface mounted FRP bars
Near surface mounted (NSM) is growing exponentially into the strengthening and repair of concrete structures over the past decades worldwide. CFRP NSM offers a superior strength over conventional steel reinforcement as well as a good durability in various environmental service conditions. However, the effect of elevated temperature, adhesiveness and chemicals has not been sufficiently studied. This study aims at assessing the impact of elevated temperatures, adhesives, and chemicals on beams exposed to flexural loading. To meet this objective, a set of 60 beams were prepared with locally available NSM and exposed to temperatures of 70, 120 and 180 Â°C for 1, 2, 4 and 8 hours. Beams were also evaluated with three levels of adhesiveness placement and were also exposed to five weeks of wetting and drying in fresh water, brine water and magnesium Sulphate. The results of this work reveal that CFRP bars NSM mounted at a depth of 25 mm introduces more than double flexural strength of conventional steel reinforced beams. Exposure to different degree temperature at various duration, placement of adhesive and exposure to chemicals all lead to substantial drop in the flexural strength and thus affect the potential gain of NSM. This study should be resumed by future research work to validate the findings on one hand and to examine the effect of numerous other parameters. Construction industry needs to be aware of the findings of this work to make better use of its implementation in future repair and retrofitting. Keywords: (Near Surface Mounted, Fibre Reinforced Polymer, Repair and Retrofitting, elevated temperature, adhesive, chemicals)
Construction Engineering Department
MS in Construction Engineering
Committee Member 1
Committee Member 2
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(2016).Impact of elevated temperature, chemical and workmanship on performance of beams with near surface mounted FRP bars [Master's Thesis, the American University in Cairo]. AUC Knowledge Fountain.
Mohamed, Mahmoud. Impact of elevated temperature, chemical and workmanship on performance of beams with near surface mounted FRP bars. 2016. American University in Cairo, Master's Thesis. AUC Knowledge Fountain.
Unquestionably, I am truly grateful to have Prof. Dr. Mohamed Nagib Abou-Zeid as my advisor. He was more than a common advisor; he was a great guider and supporter. He insisted on flourishing and providing me with his expertise. I am thankful for his patience, and the precious time that he gave me. Also, I am genuinely grateful to have Prof. Dr. Ezzeldin Yazeed who was very generous as usual with his knowledge. He believed in my capabilities and supported me till the end, and I hope I am up to his expectations. Of course, I canâ€™t disregard Mr Fares and all AUC laboratory personnel effort. They were really helpful throughout the thesis. It is of course indispensable to express my absolute appreciation and gratitude to my dearest family. Unfortunately, any amount of appreciativeness and thankfulness wonâ€™t be enough. You worked so hard to construct the perfect atmosphere and ambiance in order for me to succeed.