Correlation Analysis between Mechanical Properties and Fractions Composition of Oil-Rejuvenated Asphalt

Abstract

To clarify the intrinsic relationship between the mechanical properties of asphalt and its fraction composition, the SARA fraction composition and six macroscopic mechanical properties (critical cracking temperature (TCR), fatigue life (Nf), non-recoverable creep (Jnr3.2), penetration, ductility, and softening point) were investigated for 16 asphalt samples. Fraction contents of asphaltene and aromatic are strongly correlated with TCR and ductility (R2 > 0.92) that characterize the ability of asphalt to adapt to deformation at low and medium temperatures. Heavy fraction (asphaltene and resins) content is also strongly correlated with (R2 > 0.90) penetration and Jnr3.2 that characterize the resistance of the asphalt to overall deformation at medium and high temperatures. To express the changes in the four fractions simultaneously with one indicator, a statistic, average deviation of the fractions between the given asphalt and its original (marked σ), is introduced in this study to characterize the degree of asphalt aging based on the fraction changes. It normalizes the four simultaneous change indicators (percentage of SARA fractions) during asphalt aging into one indicator. This new indicator has a strong correlation with several mechanical performance indicators of asphalt, where it is strongly correlated with TCR (R2 > 0.90), ductility, and penetration, which are also well correlated with Jnr3.2 (R2 > 0.85), Nf (R2 > 0.75), and softening point (R2 > 0.75).

Ageing Evaluation of Foamed Polymer Modified Bitumen with Bio-Flux Additive

“…Applying asphalt binder additives can be utilised to achieve different goals, which may be as simple as softening the asphalt binder, reducing the asphalt mix processing temperatures, rejuvenating the properties of aged asphalt binder [ 4 ], or even mitigating the effects of binder ageing [ 5 ]. Commonly investigated additives such as petroleum oils, bio-oils [ 6 , 7 ], bio-polymers [ 8 ], and vegetable oil-based [ 9 ] additives usually decrease the stiffness of the asphalt binder [ 10 , 11 , 12 ] and may significantly impact other properties of the binders, such as temperature performance [ 13 ], fatigue resistance [ 14 , 15 ], and large strain performance [ 11 ], and these effects can be affected by binder ageing.…”

Using Phenol Formaldehyde Resin, Hexamethylenetetramine and Matrix Asphalt to Synthesize Hard-Grade Asphalts for High-Modulus Asphalt Concrete

“…In TLC-FID testing, a constructed chromatographic column that leverages the different diffusion heights of the four fractions of the asphalt in a toluene solution is scorched, during which the intensity of the electrons emitted by each fraction at the point of aggregation is recorded and converted into the amount of this fraction [30]. A detailed introduction of the composition of the SARA fraction of asphalt using TLC-FID quantitative analysis can be found in previous studies by our team [31,32].…”

Investigation of Waste Electrical Power Plant Oil as a Rejuvenating Agent for Reclaimed Asphalt Binders and Mixtures

“…Recently, producing asphalt rejuvenators from waste oils has gained wide acceptance. The processes of filtering, sorting, and blending are frequently used in the production of rejuvenators [ 21 ]. The rejuvenation mechanism is accomplished by reinstating the colloid structure of bitumen and improving the movement of molecules [ 22 ].…”