Optimization and evaluation of PVA/steel hybrid fiber reinforced cementious composites(HFRCC)mix ratio
The steel fiber,the domestic PVA fiber and the Japanese PVA fiber are prepared according to the appropriate proportion.The properties of different fiber materials complement each other and learn from each other.The mechanical properties of hybrid fiber reinforced cementious composites(HFRCC)can be better played,which is conducive to the cost control and has a wide application prospect.The effects of fly ash content,water binder ratio,sand binder ratio,steel fiber content,domestic PVA content and Japanese PVA content on the tensile strength and flexure strength of hybrid fiber reinforced cementious composites(HFRCC)were analyzed by using two methods of orthogonal test range selection and SNR stability selection.The results of the two methods were compared.The regression relationship between each factor and response quantity was established,and the optimal mix ratio of HFRCC was given by combining with the workability engineering performance.The results show that the optimal S/N stability scheme is more accurate and comprehensive.Fly ash content,steel fiber content,domestic PVA content and Japanese PVA content have great influence on the HFRCC response,but the water binder ratio and sand binder ratio have little influence.The mathematical model was established to predict and optimize the mix ratio.The maximum tensile strength and bending strength of HFRCC can reach 6.36 MPa and 13.90 MPa,and the absolute relative errors between the predicted value and the test value are close to 3%,and the compatibility performance is good.The results can provide a basis for the preparation of hybrid fiber reinforced cementious composites(HFRCC).
hybrid fiber reinforced cementious composites(HFRCC)PVA fibermechanical propertiesorthogonal testsignal to noise ratio S/Nmix ratio optimization
万方数据
维普
