超高强玄武岩纤维混凝土抗火性能

Fire resistance of ultra-high strength basalt fiber concrete

为了研究高温对超高强玄武岩纤维混凝土(UHSBFC)抗火性能的影响,分别掺入0、2、4 kg/m3玄武岩纤维的超高强混凝土进行抗火性能试验。试验结果表明:加入玄武岩纤维提高了超高强混凝土的强度,当玄武岩纤维为2 kg/m3时,320℃时抗压强度达到常温时的1.24倍。UHSBFC抗压强度随着温度的提高先是稍微降低而后提高,强度达到最大值之后呈现出急剧下降,500℃的时候几乎都崩裂了。

To study the influence of high temperature on fire resistance of ultra-high strength basalt fiber concrete(UHSBFC),the fire resistance of UHSBFC with 0,2 and 4 kg/m3 basalt fiber was tested.The test results show that the compressive strength of UHSBFC decreases slightly and then increases with the increase of temperature.UHSBFC(basalt fiber is 2 kg/m3)appears the same trend by 320℃at which strength is 1.28 times of that at room temperature,then on the decrease.At 500℃,almost blocks crack.