玄武岩纤维掺量及掺入方式等对混凝土抗压强度及破坏形态的影响

The Influence of Basalt Fiber Content and Mixing Methods on Compressive Strength and Failure Mode of Concrete

为了研究纤维掺入方式和快速养护方式对玄武岩纤维混凝土(BFRC)抗压强度的影响规律,采用对照试验方法,每种方式设计五组配合比,并将试件养护7 d和28 d后进行抗压强度试验,得出最佳掺量值和最佳掺入方式。同时在最佳玄武岩纤维(BF)掺量下,对BFRC试件7 d和28 d试块裂缝出现及发展过程进行数据采集记录;基于素混凝土试件的破坏模式,对BFRC试件破坏形态进行描述。根据试件裂缝出现、发展及破坏时对应的荷载进行对比分析,得出6 kg/m^3玄武岩纤维可以有效改善混凝土抗压强度及受压破坏变形。

In order to study the influence of fiber mixing method and fast curing method on the compressive strength of basalt fiber reinforced concrete(BFRC), five groups of mixing ratios were designed for each method, and the compressive strength test was carried out after the specimens were cured for 7 d and 28 d, and the optimum mixing amount and the optimum mixing method were obtained. At the same time, under the optimum BF content, the crack occurrence and development process of BFRC test block in 7 d and 28 d were recorded. Based on the failure mode of plain concrete test block, the failure mode of BFRC test block was described. According to the comparative analysis of the corresponding loads when cracks appear, develop and destroy, it is concluded that 6 kg/m^3 basalt fiber can effectively improve the compressive strength and deformation of concrete.