bitumen asphaltene maltene

Bitumen - Eni

Asphaltene sind Makromoleküle mit hohem Molekulargewicht. Sie sind für die hohe Viskosität von Bitumen verantwortlich und bilden die Hauptkomponente. Harze wirken dispergierend auf die Asphaltene und verleihen dem Bitumen Stabilität und Elastizität. Maltene werden in aromatische und gesättigte Verbindungen unterteilt und sind für die ...

Thermal and structural characterization of bitumen by ...

Composition of bitumen is generally identified by a limited number of fractions which can be separated according to the affinity in their chemical composition using so-called SARA method. According this methodology, bitumen consists of asphaltene (As) and maltene which, in turn, is divided into saturates (S), aromatics (A) and resins (R) [3, 4 ...

(PDF) Impact of maltene and asphaltene fraction on ...

Impact of maltene and asphaltene fraction on mechanical behavior and microstructure of bitumen. Materials and Structures, 2015. Hinrich Grothe. Bernhard Hofko. Shamsun Nahar. A. Schmets. Hinrich Grothe. Bernhard Hofko. Shamsun Nahar. A. Schmets. …

Impact of maltene and asphaltene fraction on mechanical ...

12%Bitumen separation and artificial bitumen samples. Bitumen can be separated into two major fractions: (a) the n-heptane soluble phase, which is generally called maltene phase, appearing as a viscous liquid at room temperature, and (b) the n-heptane insoluble phase, called asphaltene phase, which exhibits solid or almost solid properties.The bitumen samples used in this study were …

Bitumen-Gestein: Untersuchung der Haftung mittels ...

· Die Maltene (ölige Phase) setzen sich aus den Erdölharzen und Ölen zusammen. Abb.1: Schema der Bitumen-Struktur [5] Bei zunehmender Temperatur vergrößern die Maltene ihr Volumen, wobei sich das Volumen der Asphaltene verringert. Die Asphaltene sind durch die Maltene getrennt und haben keinen Verbund mehr. Es entsteht Solbitumen.

Direct observation of the asphaltene structure in paving ...

The asphaltene aggregates in the bitumen were observed to be 2-7 micro m in size and formed a dispersed 'sol' structure in the continuous maltene matrix rather than a network 'gel' structure. Surprisingly, the structure and fluorescence of the asphaltene phase does not appear to alter radically upon oxidative ageing.

Impact of Laboratory-Induced Thermal Maturity on ...

maltene fractions of bitumen evolve diﬀerently. The observed changes in asphaltene structure are not fully independent of one another, as the composition of asphaltenes is constrained to maintain a balance of the strength of intermolecular forces to ensure

Inﬂuence of asphaltene content on mechanical bitumen ...

and very stiff inclusions dispersed in the maltene phase. In order to identify the inﬂuence of micro-structural changes, artiﬁcial bitumens were produced from a paving grade bitumen 70/100 with 7.79 vol% asphaltene content. After separating maltenes and asphaltenes by n …

Direct observation of the asphaltene structure in paving ...

in bitumen. The asphaltene aggregates in the bitumen were observed to be 2–7 µ m in size and formed a dispersed 'sol' structure in the continuous maltene matrix rather than a network 'gel' structure. Surprisingly, the structure and ﬂuorescence of the asphaltene phase does not appear to alter radically upon oxidative ageing.

Asphaltene | Soundbite | RSC Education

Bitumen (asphalt) is the highest-boiling point, heaviest and most polar fraction from the vacuum distillation of crude oil. Bitumen is composed of asphaltene and maltene. The heavy insoluble asphaltene molecules give bitumen its body and softening point while the …

Probing hydrocarbon dynamics at asphaltene/maltene ...

Such a technique should relate the local physical properties, such as the microdynamics of hydrocarbons at asphaltene/maltene interfaces, with the empirical bulk characteristics of bitumen at various temperatures. This is critical for understanding the structure–property relationships at the origin of this progressive transition.

Solids Associated with the Asphaltene Fraction of Oil ...

Dilution of bitumen froth with a less polar solvent than naphtha reduces the overall stability of asphaltene micelles in the maltene component of bitumen. Asphaltene then co-precipitates with the inorganic particles and water to form a "rag layer". This process yields bitumen of excellent quality, in terms of solids and water content.

Asphaltene - Wikipedia

The word "asphaltene" was coined by Boussingault in 1837 when he noticed that the distillation residue of some bitumens had asphalt-like properties. Asphaltenes in the form of asphalt or bitumen products from oil refineries are used as paving materials on roads, shingles for roofs, and waterproof coatings on building foundations.

Asphalt Technology - Perpustakaan

A/M-Ratio Asphaltene/Maltene-Ratio BANDS Bitumen and Asphalt Nomographs Developed by Shell SPDM Shell Pavement Design Method BISAR Bitumen Stress Analysis in Roads σ Stress σx, σy, σz Stresses in the 3 orthogonal directions σv Stress in vertical direction σr Stress in radial direction ...

(PDF) Structure and Function of Asphaltenes: A Geochemical ...

Heavily biodegraded oil, where there are no n-alkanes present in the maltene fraction, show a maximum in the n-alkane distribution at about n-C28 for both the occluded and adsorbed fractions. A similar type of behaviour is followed by the source rock bitumen in that the n …

Fundamental Studies of Bitumen Aeration

coated bitumen surface, forming a low contact angle; b) maltene diffuses into the asphaltene layer on the surface and increases the contact angle of the layer, and subsequently covers bubble surface; c) when the air bubble is covered by the maltene-saturated asphaltene, the bubble enters bitumen droplet, completing aeration. Thermodynamically ...

Thermolysis and oxidation of the Alberta oil sand bitumen

The U.S. Department of Energy's Office of Scientific and Technical Information

Ethylene-Octene-Copolymer as an alternative to Styrene ...

Therefore, bitumen was separated into the maltene and asphaltene fractions and artificial bitumen samples with different, pre-defined asphaltene concentrations were produced and investigated.

Elucidating the 1H NMR Relaxation Mechanism in ...

The mechanism behind the 1H nuclear magnetic resonance (NMR) frequency dependence of T1 and the viscosity dependence of T2 for polydisperse polymers and bitumen remains elusive. We elucidate the matter through NMR relaxation measurements of polydisperse polymers over an extended range of frequencies (f0 = 0.01-400 MHz) and viscosities (η = 385-102 000 cP) using T1 and T2 in static fields, …

The distinctive microstructures in bitumen and their ...

To tackle this challenge, we chose two pristine bitumen (i.e., ABD and AAD), separated them into their asphaltene and maltene fractions, and prepared derivative bitumen by remixing their corresponding asphaltenes and maltenes at different ratios. We studied the microstructures of the two pristine bitumen and their derivatives using atomic force ...

Influence of asphaltene content on mechanical bitumen ...

Thereby, bitumen was considered as a four-phase composite, consisting of a contiguous maltene matrix with embedded spherical asphaltene and saturate inclusions. In addition, needles built up by highly polar aromatics and resins oriented in all directions were implemented to represent the interaction between asphaltene micelles.

Asphaltenes in bitumen, what they are and what they are not

Therefore, bitumen was separated into the maltene and asphaltene fractions and artificial bitumen samples with different, pre-defined asphaltene concentrations were produced and investigated.

(PDF) Rheological effects on bitumen of polyphosphoric ...

asphaltene fraction obtaining the maltene phase (named as MAL Consequently, in recent years, rheometers have been exten- sample). sively used to study the bitumen microstructure [1,3,6,11–14] and many efforts have been made to correlate rheological data with bitumen performance, proposing novel parameters and 3.

Applied Sciences | Free Full-Text | NMR Diffusiometry ...

Asphaltene aggregates remain in an oily apolar environment of lower molecular weight, known as maltenes, granting fluidity . The apolar maltene phase, in turn, is composed of saturated paraffins, aromatic oils, and resins. Figure 1 shows a schematic splitting of bitumen into its main components.

Behavior comparison of films of Mexican bitumen and its ...

Bitumen, asphaltene, or maltene samples were spread at the air/water interface by carefully depositing the samples drop-by-drop on the surface of deionized water, using 100 μl microsyringe. The volumes and concentrations of bitumen, asphaltenes, ...

Bitumen Penetration Grade 60/70, Specification of Bitumen ...

Bitumen 60/70 has the highest-boiling point, heaviest and most polar fraction from the vacuum distillation of crude oil. Bitumen 60/70 is composed of asphaltene and maltene. The heavy insoluble asphaltene molecules give bitumen 60/70 its body and softening point while …

Effects of Natural Antioxidant Agents on the Bitumen Aging ...

Therefore, the concentration of paramagnetic centers in both the asphaltene and maltene fractions of bituminous specimens were obtained by double integration of the experimental first-derivative spectrum and compared with EPR spectrum of a known amount of a MgO-MnO solid solution used as standard [36,37] (spin density = 6.83 × 10 15 spin/g

(PDF) STUDIES TO ESTABLISH KEY PROCESSES PARAMETERS FOR ...

KEYWORDS: Air Blowing, Asphaltene, bitumen, Conventional Binder, Maltene, Short Residue INTRODUCTION Bitumen is a visco-elastic semi solid viscous material and is composed of mainly two components viz. asphaltene and maltene. Asphaltene is dispersed phase and maltene is dispersion medium in a colloidal system of bitumen.