炭素繊維シート補強材の防火性能

概要

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Carbon fibers are one of the most effective materials for seismic strengthening. However fire resistance of strengthening with carbon fiber reinforced plastics (CFRP which is made of carbon fiber sheets and epoxy resin or MMA resin) should be taken into account because of its combustibility. The fire resistance of carbon fiber reinforced plastics using seismic strengthening has been studied in accordance with methods of Japanese Industrial Standard; tensile strength tests of CFRP exposed with elevated temperature, residual tensile strength of CFRP exposed with elevated temperature, quasi-noncombustibility tests of CFRP. The test results indicate that the tensile strength of CFRP at nearly glass transition temperature of resin decreased to approximately 40% of the tensile strength at 20℃, residual tensile strength of CFRP which used epoxy resin had heated up to 200℃ and which used MMA resin had heated up to 260℃ were equal to the tensile strength at 20℃ respectively, and CFRP covered with a plaster board had quasi-noncombustibility.
一般社団法人日本建築学会の論文
2004-03-20