Study on Mechanical and Durability Properties of Fly Ash Concrete Reinforced with Basalt-sisal Fiber
In order to analyze the effect of basalt fiber and sisal fiber mixture on the working performance,mechanical properties and durability of fly ash concrete,mixed fiber fly ash concrete samples with different basalt fiber and sisal fiber content were prepared.The collapse,cubic compressive strength,splitting tensile strength,mass loss rate and residual compressive strength under chlorine salt erosion and relative dynamic elastic modulus under freeze-thaw cycle of fly ash concrete were tested under various hybrid fiber volumes.The results show that the decrease of slump of fly ash concrete is proportional to the increase of volume content of basalt fiber and sisal fiber,the proportions of which are 20.0 mm/0.1％and 25.0 mm/0.1％,respectively.With the increase of basalt fiber and sisal fiber volume,the compressive strength and tensile strength of fly ash concrete increase slowly at first,and then decrease rapidly.When the volume content of basalt fiber is 0.10％and sisal fiber is 0.10％and 0.15％,the compressive and tensile properties of fly ash concrete are the best.The addition of basalt fiber and sisal fiber is conducive to the improvement of chloride ion erosion resistance and freeze resistance of fly ash concrete,and the optimal volume content of basalt fiber and sisal fiber is 0.10％.
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