Measuring polarity-based distributions (SARA) of bitumen using simplified chromatographic techniques

Sakib, Nazmus; Bhasin, Amit

doi:10.1080/10298436.2018.1428972

Cited by 50 publications

(20 citation statements)

References 27 publications

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“…For both asphalt binders (A and B), the values of Ic were close to 0.70, which indicated that both asphalt binders have a gel–sol transition behavior [ 82 ]. However, it should be noted that in the present study, the SARA fractionation was based on the methodology developed by Sakib et al (2019) using solid-phase extraction (discontinuous solvent gradient) instead of column chromatography (continuous solvent gradient) [ 45 ]. The pore size and the material of the filter used in this methodology lead to a higher yield of asphaltenes when compared to the values obtained by the ASTM D4124 standard.…”

Section: Resultsmentioning

confidence: 99%

“…In this study, the asphalt binder fractionation was carried out according to an adapted version of the SARA fractionation methodology developed by Sakib et al [ 45 ], which is mainly divided into two steps. In the first step, the asphaltenes (n-heptane insoluble) are separated from maltenes (n-heptane soluble) by solvent precipitation followed by filtration.…”

Section: Methodsmentioning

confidence: 99%

“…Using SPE, a clear classification of different polarity groups is achieved, which is advantageous for further analysis. The main difference between the method proposed by Sakib et al [ 45 ] and the method considered in this study is the procedure used to dry the solvent solutions. In the next paragraphs, the methodology adopted in this study is briefly described.…”

Section: Methodsmentioning

confidence: 99%

“…In the next paragraphs, the methodology adopted in this study is briefly described. Further details can be found at [ 45 , 46 ].…”

Section: Methodsmentioning

confidence: 99%

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Effect of Thermal and Oxidative Aging on Asphalt Binders Rheology and Chemical Composition

et al. 2020

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Aging of asphalt binders is one of the main causes of its hardening, which negatively affects the cracking and fatigue resistance of asphalt binders. Understanding asphalt aging is crucial to improve the durability of asphalt pavements. In this regard, this study aims at understanding and differentiating the effect of temperature and oxygen uptake on the aging mechanisms of unmodified asphalt binders. For that, four laboratory aging procedures were employed. The two standardized procedures, rolling thin-film oven test (RTFOT) and pressure aging vessel (PAV), were considered to simulate the short-term and long-term aging of the asphalt binders, respectively. In addition, two thin-film aging test procedures, the nitrogen atmosphere oven aging test (NAAT) and ambient atmosphere oven aging test (OAAT) were employed to assess the effect of thermal and oxidative aging on unmodified asphalt binder properties. The NAAT procedure is based on the principle that the inert gas minimizes the oxidative aging. The rheological and chemical characterization showed that the high temperatures considered during the NAAT procedure did not change the properties of the unmodified asphalt binders. Therefore, it can be hypothesized that no significant thermal and oxidative aging was observed during NAAT aging procedure for the considered binders and that oxidative aging is the main cause for the hardening.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…In the next paragraphs, the methodology adopted in this study is briefly described. Further details can be found at [ 45 , 46 ].…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Thermal and Oxidative Aging on Asphalt Binders Rheology and Chemical Composition

et al. 2020

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“…Colloidal instability (Gaestel) index I c was calculated from SARA fractions, and with aging showed increased content level of asphaltenes [12,24,59]. The I c is usually used to compare the stability of different bitumens.…”

Section: Bitumen Fractional Groups (Sara) Composition Test Proceduresmentioning

confidence: 99%

Effect of Aging on Chemical Composition and Rheological Properties of Neat and Modified Bitumen

2019

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The aim of this research was to define the effect of oxidative aging on the chemical and rheological properties of neat and styrene-butadiene-styrene (SBS) polymer-modified bitumen. The experimental research had two objectives: firstly, the short and long-term effects of aging on the properties of neat and polymer-modified bitumen were investigated. Then, the aging indexes based on chemical and rheological properties to describe the age of unknown bitumen were established. Aging characteristics such as the Gaestel index, sulfoxide and carbonyl indexes, linear viscoelastic strain range, crossover temperature, and Glover–Rowe parameter were analysed for laboratory aged and naturally aged neat and polymer-modified bitumen. The functional composition of aged bitumen was evaluated by measuring absorption with Fourier transform infrared (FT-IR) attenuated total reflection (ATR) spectrometer. The saturates, aromatics, resins, and asphaltenes (SARA) fractions were determined with thin layer chromatography with flame-ionization detection (TLC-FID) to determine the colloidal instability index (Gaestel index). Finally, the complex shear modulus was determined with dynamic shear rheometer (DSR) to evaluate the influence of aging on the bitumen mechanical performance.

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Identification of ageing state clusters of reclaimed asphalt binders using principal component analysis (PCA) and hierarchical cluster analysis (HCA) based on chemo-rheological parameters

Margaritis

Soenen²,

Fransén

et al. 2020

Construction and Building Materials

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Measuring polarity-based distributions (SARA) of bitumen using simplified chromatographic techniques

Cited by 50 publications

References 27 publications

Effect of Thermal and Oxidative Aging on Asphalt Binders Rheology and Chemical Composition

Effect of Thermal and Oxidative Aging on Asphalt Binders Rheology and Chemical Composition

Effect of Aging on Chemical Composition and Rheological Properties of Neat and Modified Bitumen

Identification of ageing state clusters of reclaimed asphalt binders using principal component analysis (PCA) and hierarchical cluster analysis (HCA) based on chemo-rheological parameters

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