Experimental study on triaxial mechanical properties of precast split basalt fiber concrete
The compression tests of basalt fiber reinforced concrete with prefabricated cracks under different confining pressures are carried out by triaxial loading device,and the effects of prefabricated crack angle,basalt fiber content and confining pressure on the peak stress,cohesion,elastic modulus and volume strain of the specimens are analyzed.The results show that:1)when the confining pressure and fiber content are constant,the peak stress and ultimate strain bearing capacity(µ)of the specimen decrease first and then increase with the increase of the crack angle.The influence is minimal when the angle is 0,and the influence is greatest when the angle is about 30°-45°.2)The peak stress of the specimen is linearly positively correlated with the confining pressure.3)The increase of fiber content makes the peak stress and elastic modulus of the specimen increase first and then decrease.The optimum content is 0.2%.4)The higher the confining pressure is,the lower the volume strain of the specimen will be,and the ultimate strain bearing capacity of the specimen with different prefabricated fracture angles decreases with the increase of surrounding pressure.
basalt fibersurrounding pressureprefabricated fracturepeak stresscohesionmodulus of elasticityvolume strain
万方数据
维普
