钢筋玄武岩纤维混凝土短柱轴心受压承载能力试验研究

Experimental Study on Load-Carrying Capacity of Basalt Fiber Reinforced Concrete Short Columns under Axial Compression

为了研究玄武岩纤维对钢筋混凝土受压构件中增强功能,推进玄武纤维的应用,本文首先对添加0.1%体积掺量的5种长度玄武岩纤维混凝土进行纤维最佳长度研究;得到最佳长度为12 mm玄武岩纤维对混凝土立方体强度增强效果最佳;其次选择12 mm和24 mm的两种玄武岩纤维混凝土最佳掺量进行研究,得到最佳掺量0.15%。在此基础上,本文以体积掺量0.15%,长度为12 mm和24 mm玄武岩纤维混凝土各制作了3根钢筋玄武岩纤维短柱,制作普通钢筋混凝土短柱3根,并对所有试验柱进行了轴心受压极限承载力试验,结果发现,钢筋玄武岩纤维混凝土短柱的轴心受压极限承载能力较普通钢筋混凝土柱最大提高了28%;玄武岩纤维提高了钢筋混凝土短柱的延性。另外,钢筋玄武岩纤维混凝土短柱轴心受压极限承载力试验值大于理论计算值,说明玄武岩纤维不仅提高了混凝土抗压性能,也提高了钢筋和混凝土共同作用效能。

In order to study the reinforced function of the basalt fiber reinforced concrete compression members and to promote the application of basalt fiber,the optimal length of fiber was obtained by adding five basalt fiber concrete with 0. 1% volume fraction. 12 mm basalt fiber on the strength of the concrete cube reinforcing the best effect; followed by the choice of 12 mm and 24 mm of the two basalt fiber reinforced concrete the best amount to study the best dosage range is 0. 15%. Finally,three basalt fiber short columns were made with 0. 15% volume fraction,12 mm length and 24 mm length basalt fiber concrete respectively. Three columns of ordinary reinforced concrete short columns were made and the axial compression limit of all test columns was made. The results show that the bearing capacity of reinforced concrete short columns with basalt fibers increases by 28% compared with ordinary reinforced concrete columns. Basalt fiber improves the ductility of reinforced concrete short columns. In addition,the bearing capacity of axially loaded columns of reinforced concrete short columns with basalt fiber is larger than the calculated value,indicating that basalt fiber not only improves the compressive strength of concrete,but also enhances the performance of reinforced concrete and concrete.