High Temperature Rheological Performance of Graphene Modified Rubber Asphalt
Abstract
To elucidate the high temperature rheological capability of graphene modified rubber asphalt， three contents of graphene and crumb rubber were prepared by a combination of mechanical agitation and high speed shearing machine ,then used dynamic shear rheological test (DSR) and multiple stress creep recovery (MSCR) tests to evaluate. The hardness and softening point with rotational viscosity of samples raised with the addition of graphene, especially the addition of 0.04%. Dynamic shear rheological test revealed that the dynamic shear modulus G*, rutting factor G*/Sin δ, and zero shear viscosity (ZSV) of graphene-modified rubber asphalt were greatly influenced along with graphene-increased, on the contrary, phase angle δ which characterize the viscoelastic ratio of asphalt decreased. Multiple stress creep recovery (MSCR) tests showed that the graphene-enhanced rubber asphalt had high-temperature stability through non-recoverable creep compliance (Jnr). Based on these findings, graphene-modified rubber asphalt binders with the addition of 0.04% graphene had good viscoelastic properties as well as high temperature rutting resistance performance. In the meantime, G*/Sin δ, ZSV, and Jnr100, Jnr3200 have good correlation, which can reveal the excellent high-temperature stability performance of asphalt.
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DOI: https://doi.org/10.33142/rams.v6i1.12887
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