Experimental study on flexural behavior of basalt fibers admixing desert sand RC beam
The feasibility of desert sand partly instead of ordinary sand was discussed,and the effects of desert sand and basalt fiber on the performance of concrete test blocks and reinforced concrete beams were studied.The flexural behavior tests of ordinary sand concrete beam,desert sand concrete beam,basalt fiber ordinary sand concrete beam and basalt fiber desert sand concrete beam were carried out,and the load-deflection curves,crack distribution and failure modes of the test beams were obtained.Then,using the existing theoretical formula,the splitting tensile strength,axial compressive strength,elastic modulus of the concrete test block and the yield bending moment and ultimate bending moment of the test beam were calculated.The results show that it is feasible to partially replace ordinary sand with natural desert sand.The incorporation of desert sand and basalt fiber does not substantially change the performance of concrete test blocks and reinforced concrete beams.After the incorporation of desert sand and basalt fiber,the calculation criteria of concrete test blocks and reinforced concrete beams are still applicable.
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