矿井巷道复合纤维混凝土耐久性试验研究

Experimental Study on Durability of Composite Fiber Reinforced Concrete in Mine Laneway

以矿井巷道支护结构为研究背景,对复合纤维混凝土的耐久性进行试验研究,同时试验成果对比于素混凝土。取得结论如下:①抗渗试验表明复合纤维混凝土渗水高度能够达到12.0 mm,低于素混凝土的14.2 mm;②早期裂缝试验表明复合纤维混凝土的裂缝降低系数能够达到0.66,可以有效降低早期开裂;③通过碳化试验、电通量试验及硫酸盐腐蚀试验,得到复合纤维混凝土碳化深度更小、电通量更大、抗侵蚀能力更强。所得结果可在一定程度上为复合纤维喷射混凝土在矿井巷道支护中的研究与应用提供借鉴。

Taking the supporting structure of mine roadway as the research background,the durability of composite fiber reinforced concrete was investigated and compared with that of the plain concrete.The conclusions are shown as follows:①The impermeability test shows that the seepage height of CFC reaches 12.0 mm,which is lower than 14.2 mm of plain concrete;②Early crack test shows that the crack reduction coefficient of CFC reaches 0.66,which can effectively reduce early cracking;③Through carbonization test,electric flux test and sulfate corrosion test,the composite fiber concrete obtained has features of small carbonization depth,large electric flux and strong erosion resistance.The results can provide a reference for the research and application of composite fiber spraying concrete in mine roadway to a certain extent.