The influence of high temperature on glass-polypropylene hybrid fiber concrete was studied,and the influence of different cooling methods on the strength of concrete was compared.Based on the test results,the high temperature damage mech-anism and fiber strengthening mechanism were analyzed.The results show that water spraying cooling has great damage to the concrete strength.When the mixture amount of glass fiber and polypropylene fiber is 0.4％and 0.1％respectively,the fire resis-tance of concrete can be significantly improved.At 400 ℃,the compressive strength and flexural strength of concrete can be in-creased by 15.3％and 30.9％,respectively under natural cooling.While under water spraying cooling,the compressive strength and flexural strength were increased by 21.3％and 30.3％,respectively.
关键词
高温/冷却方式/玻璃纤维/聚丙烯纤维/混凝土
Key words
high temperature/cooling mode/glass fiber/polypropylene fiber/concrete
维普
万方数据