Effect of KH-560 treatment time on the properties of PAN based carbon fiber asphalt composites
PAN based carbon fiber asphalt composites with different KH-560 treatment times were prepared u-sing PAN based carbon fibers modified with silane coupling agent KH-560 as the additive material.The effects of KH-560 treatment time on the high-temperature stability,low-temperature crack resistance,water stability,fatigue performance and sound absorption performance of asphalt composite materials were studied through rut-ting tests,freeze-thaw splitting tests and indirect tensile fatigue tests.The results showed that the surface roughness of PAN based carbon fibers treated with KH-560 increased,when the KH-560 treatment time was 2 h,the fiber grooves were deeper,and the interaction area with asphalt increased.The fibers formed a dense net-work structure in the composite material,enhancing the stability of PAN based carbon fiber composites.When the KH-560 treatment time was 2 h,the high temperature performance,low temperature crack resistance,wa-ter stability,and fatigue performance of PAN based carbon fiber asphalt composite material were all the best.At this point,its deformation and failure stiffness modulus at 45 and 60 min reached the minimum values,which were 1.851 and 2.117 mm,2201 MPa,respectively.The maximum values of dynamic stability,splitting tensile strength,and failure tensile strain were 3077 times/mm,4.6 MPa,and 3479 με,respectively.In the range of 250-1 000 Hz and 1 000-1 600 Hz,when the KH-560 treatment time was 2 h,the average sound ab-sorption coefficients of the asphalt composite material reached their maximum values,which were 0.116 and 0.127,respectively,which were 39.76％and 45.98％higher than the untreated asphalt composite material,re-spectively.The sound absorption and noise reduction performance was significantly improved.In summary,the optimal processing time for KH-560 is 2 h.
KH-560 treatmentPAN based carbon fiberasphaltcomposite materialsfatigue performancesound absorption performance
万方数据
维普
