Experimental study on mechanical properties of aramid fiber reinforced concrete under freezing-thawing cycles
Aramid fiber has the characteristics of high fiber content,low density and high toughness,which has great potential for improving the mechanical properties of concrete materials.The mechanical properties of aramid fiber reinforced concrete(AFRC)with different fiber volume content(1%,2%and 4%)and aspect ratio(200,400 and 600)under freezing-thawing cycle are studied experimentally.The compressive strength and tensile strength of AFRC are obtained.The test results show that the compressive strength and tensile strength of concrete decrease with the increase of freezing-thawing cycles.After 60 cycles,the compressive strength and tensile strength of AFRC are reduced by about 50%respectively.The compressive strength of AFRC decreases with the increase of fiber volume content and increases with the increase of fiber aspect ratio,while the tensile strength is remain unchanged.In addition,the prediction and transformation models of compressive strength and tensile strength of aramid fiber reinforced concrete are established based on the experimental data.
万方数据
维普
