Three asphalt binders: unmodified (VG30), polymer modified (PMB40), and crumb rubber modified (CRMB60) binders, and four aggregates (basalt, limestone, granite, and sandstone) were selected in this study.
Three asphalt binders, namely unmodified (VG30), SBS polymer modified binder (PMB40) and crumb rubber modified (CRMB60) binders were selected for the present study.
The micrograph of crumb rubbers modified asphalt binders indicated that the light weight fraction in asphalt promoted a swelling of crumb rubbers in the modified asphalt binder, and crumb rubbers with high swelling rate improved the crumb rubbers disperse in asphalt to form continuous and interlocked phase.
This study investigated the interaction among different components of asphalt binders collectively modified with crumb rubber and warm mix additives through thermal gravimetric analysis (TGA) and differential scanning calorimeter (DSC) testing.
In this paper, utilizing the bending Beam rheometer (BBR) test, low temperature rheological properties of asphalt binders which are modified by crumb rubber and gilsonite are investigated.
The asphalt mixtures modified with crumb rubber modifier (CRM) were evaluated to estimate the deformation resistance at a high service temperature, fatigue resistance and tensile strength at ambient temperatures.
In this research, nonlinear viscoelastic properties of asphalt binders modified with crumb rubber, styrene-butadiene-styrene and polyphosphoric acid are investigated to evaluate the variation in non-linear viscoelastic parameters due to addition of these modifiers.
In the present work, fracture resistance of two types of hot mix asphalt (HMA) mixtures (i.e. the first one contained a normal binder, and the second one contained the same binder but modified by crumb rubber of recycled tyres) was successfully characterized using an asymmetric disc bend specimens.
First, bitumen modified with crumb rubber was evaluated by rotational viscometery (RV), dynamic shear rheometry (DSR) and conventional binder tests.
