Laboratory investigation of the recycled asphalt concrete with stable crumb rubber asphalt binder

Modelling of rheological and chemical properties of asphalt binder considering SARA fraction

Correlation of asphalt performance indicators and aging Degrees: A review

Using of rubber asphalt can both promote the recycling of waste tires and improve the performance of asphalt pavement. However, the segregation of rubber asphalt caused by the poor storage stability always appears during its application. Storage stability of asphalt and rubber is related to the compatibility and also influenced by rubber content. In this study, molecular models of different rubbers and chemical fractions of asphalt were built to perform the molecular dynamics simulation. The solubility parameter and binding energy between rubber and asphalt were obtained to evaluate the compatibility between rubber and asphalt as well as the influence of rubber content on compatibility. Results show that all three kinds of rubber are commendably compatible with asphalt, where the compatibility between asphalt and cispolybutadiene rubber (BR) is the best, followed by styrene-butadiene rubber (SBR), and natural rubber (NR) is the worst. The optimum rubber contents for BR asphalt, SBR asphalt, and NR asphalt were determined as 15%, 15%, and 20%, respectively. In addition, the upper limits of rubber contents were found as between 25% and 30%, between 20% and 25%, and between 25% and 30%, respectively.

Evaluation of the compatibility between rubber and asphalt based on molecular dynamics simulation

Review of the flame retardancy on highway tunnel asphalt pavement

Combustion properties of saturates, aromatics, resins, and asphaltenes in asphalt binder

Combustion mechanism of four components separated from asphalt binder

The graphene oxide (GO) was used to improve the mechanical performances of epoxy asphalt (EA) by preparing GO/EA composite. The influence of the GO dosage on the micro-structure, curing rheology, mechanical and thermal properties of GO/EA was investigated. According to the XRD and Fourier transform infrared spectra, the GO was exfoliated in the EA matrix and modified EA by non-covalent strategy. GO decreased the rotational viscosity of EA and increased the pot life. The GO/EA with 0.1 wt.% GO showed excellent toughness that the elongation at break was increased by 164%, and the tensile and pull-off adhesion strength were nearly equal to that of EA. The addition of GO improved the original thermal decomposition temperature (T 5%), glass transition temperature (T g), compatibility and stiffness of the EA. The improved mechanical and thermal properties of GO/EA may be attributed to (1) excellent performances of GO and (2) inhibiting effect of GO on the EA curing process.

Enhanced mechanical performances of epoxy asphalt adhesives modified by graphene oxide

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Papers

Combustion properties of saturates, aromatics, resins, and asphaltenes in asphalt binder

Combustion mechanism of four components separated from asphalt binder

Enhanced mechanical performances of epoxy asphalt adhesives modified by graphene oxide