Rheological evaluation of polymer modified asphalt binders

Abstract

The microstructure and dynamic rheological characteristics of asphalt containing different polymer modifiers (crumb rubber, styrene-butadiene-styrene and crumb rubber mix with styrenebutadiene-styrene) at mid and high service temperature levels were investigated by using scanning electron microscopy(SEM), dynamic shear rheometer(DSR) and repeat creep test. The main objective of the investigation was to rank the modifiers based on their effect on performance characteristics of asphalt under service conditions. To evaluate the effect of different modifiers on the viscoelastic response of asphalt, the temperature and frequency dependences of the dynamic viscoelastic properties were compared. The mid-temperature fatigue resistance and high-temperature rutting resistance of three polymer modified asphalts were evaluated to predict their field performance in roads. Based on the current results, an improved rutting factor was proposed to determine the rutting resistance of asphalt pavements. In addition, the viscous stiffness (Gv), defined as the reciprocal of viscous compliance, was used to evaluate the high-temperature deformation resistance of asphalt mixtures. The experimental results indicate that the asphalt containing crumb rubber only shows superior performance at mid and high service temperatures in all three modified asphalt binders due to the action of the crumb rubber.

Synthesis of silane‐grafted ethylene vinyl acetate copolymer and its application to compatibilize the blend of ethylene‐propylene‐diene copolymer and silicone rubber

“…Figure a shows the logarithmic plot of dependence of complex modulus ( G *) as a function of frequency under the temperature of 140°C. The G * is defined as the ratio of maximum shear stress to maximum strain and provides a measure of the total resistance to deformation . The complex modulus increase with increasing in frequency.…”

Assessment of asphalt pavement aging condition based on GF-2 high-resolution remote sensing image

“…Among these characteristics are the length and density of cracks, the number and size of potholes, the length and width of ruts, etc 49 – 51 The PCI equations are Eqs. (1) and (2): PCI=100−anormaloDRa1,DR=100×∑i=1i0wiAi/A.…”

Characterization of Desulfurized Crumb Rubber/Styrene–Butadiene–Styrene Composite Modified Asphalt Based on Rheological Properties

“…With the rapid and large-scale construction and maintenance of highways, the demand for high-performance asphalt binder has increased sharply over the past several years. Fatigue, rutting, and other diseases of asphalt pavement are closely related to the elastic and viscous deformation behaviors of asphalt under various working conditions [ 1 , 2 ]. At low temperatures, elasticity dominates, and asphalt behaves as an elastomer.…”