At higher temperatures, use JNFRP fibers to test the compressive strength of cylindrical concrete, using 1 layer of JNFRP and 2 layers, heated at 50 ° C and room temperature It was found that the sample at room temperature was 12.9-29.6% higher than the high-temperature sample using JNFRP. In the tensile strength tests of JNFRP and epoxy resin at different temperatures, it was found that JNFRP At higher temperatures, the tensile strength and modulus are greater than N
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