Study on the main carve of carbon nanotubes modified asphalt
Matrix asphalt No.90 was selected and mixed with carbon nanotubes with a total mass of 1%,2%and 3%.Conventional performance tests and dynamic shear rheological tests were carried out on carbon nanotube modified asphalt,and the main curves of complex modulus of carbon nanotube modified asphalt with different content were determined based on the time-temperature equivalence principle.The results show that the high temperature stability and shear resistance of modified asphalt increase with the increase of carbon nanotubes content.The viscoelastic index of carbon nanotubes in a wide frequency range was predicted using the complex modulus master curve fitted by sigmoidal.The first order function fitted by temperature displacement factor showed a high correlation coefficient greater than 0.996.
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