Volume 20 No 20 (2022)
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Investigating the Strain of Standard Concrete Specimen with FRP and Nano Silica Fiber Coating
Mohammadreza.Valipour,Siavash.Khanmirzaee,Behnam.Rahmati M.SMahmood.Rabbani
Abstract
Prevention of the occurrence or reduction of mortality and financial losses due to earthquakes in our country is important given its geologically sensitive location. One of the activities that is carried out today in the advanced countries in this field is the examination of existing buildings to assess the structures and identify their weaknesses, to improve and if they are damaged, they will be strengthened. Screw-up of concrete members with FRP materials is considered as a new method of repairing and retrofitting buildings. Also, the use of nano-silica in concrete increases the compressive strength. In this study, the results of a laboratory study on the performance of a concrete sample of nano silicon with FRP fibers are investigated. For this purpose, 9 samples with nano silica with the proposed mixing rate of the factory and 36 silica-filtrated and rounded screws with 4 series of fiber in the Iranian market, which are laboratory samples including 45 cylindrical samples, are tested. In all models, the strain rate in the compression test was examined. In general, compared to the results, it was found that the nano silica-reinforced specimen was less versatile than nano silica without a nano silica, and the use of nano particulate fibers with nano silica rather than nano silica should be considered by designers in retrofit schemes when using nano silica.
Keywords
pressure strain, Nano silica, FRP fibers, retrofitting
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