Infrared microscopy investigation of oxidation and phase evolution in bitumen modified with polymers

Mouillet, Virginie; Lamontagne, J.; Durrieu, F; Planche, Jean‐Pascal; Lapalu, Laurence

doi:10.1016/j.fuel.2007.06.029

Cited by 181 publications

(87 citation statements)

References 17 publications

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“…10.7% for polymer-rich phase and around 0.9% for bitumen-rich phase. This simulation result agrees well with the experimental measurement results by other researchers [15].…”

Section: Parametric Studiessupporting

confidence: 92%

“…the separation of polymer-rich phase from bitumen-rich phase [11]. Many previous studies [1][2][3][4][5][12][13][14][15] have experimentally investigated the effects of bitumen and polymer properties and their compatibility on the PMB morphology and storage stability. However, these studies found it difficult to demonstrate the key parameters controlling the phase separation process.…”

Section: Introductionmentioning

confidence: 99%

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Modelling and numerical simulation of phase separation in polymer modified bitumen by phase-field method

Zhu

Balieu

et al. 2016

Materials & Design

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In this paper, a phase-field model with viscoelastic effects is developed for polymer modified bitumen (PMB) with the aim to describe and predict the PMB storage stability and phase separation behaviour. The viscoelastic effects due to dynamic asymmetry between bitumen and polymer are represented in the model by introducing a composition-dependent mobility coefficient. A double-well potential for PMB system is proposed on the basis of the Flory-Huggins free energy of mixing, with some simplifying assumptions made to take into account the complex chemical composition of bitumen. The model has been implemented in a finite element software package for pseudo-binary PMBs and calibrated with experimental observations of three different PMBs. Parametric studies have been conducted. Simulation results indicate that all the investigated model parameters, including the mobility and gradient energy coefficients, interaction and dilution parameters, have specific effects on the phase separation process of an unstable PMB. In addition to the unstable cases, the model can also describe and predict stable PMBs. Moreover, the phase inversion phenomenon with increasing polymer content in PMBs is also well reproduced by the model. This model can be the foundation of an applicable numerical tool for prediction of PMB storage stability and phase separation behaviour.

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“…10.7% for polymer-rich phase and around 0.9% for bitumen-rich phase. This simulation result agrees well with the experimental measurement results by other researchers [15].…”

Section: Parametric Studiessupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Modelling and numerical simulation of phase separation in polymer modified bitumen by phase-field method

Zhu

Balieu

et al. 2016

Materials & Design

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“…Aromaticity, aliphaticity, oxidation and sulphurization measure changes in the aromatic, aliphatic, carbonyl and sulphony functional groups, respectively in a material (Lamontagne et al, 2001;Kovaleva and Golubev, 2005;Mouillet et al, 2008). Thus, changes in the values of these indices Table 4 are evidences that bitumen samples recovered in this study were degraded products of the control sample.…”

Section: Resultsmentioning

confidence: 65%

Preliminary Study on Biodegradation of Nigerian Natural Bitumen

Olabemiwo¹,

Adediran²,

Adekola³

et al. 2011

Microbiology J.

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One of the major problems facing the existence of man in this millennium is pollution. Thus, it is no surprise that much attention is given to pollution control and remediation of polluted environment. While remediation can be achieved by physicochemical and biological methods, application of the latter tends to be gaining upper hand due to some of its inherent advantages. This study investigated the biodegradability of bitumen from Agbabu, Southwestern Nigeria by hydrocarbon utilizing strains of Pseudomonas putrefaciens, Pseudomonas nigrificans, Bacillus licheniformis, Pseudomonas tragi and Achromobacter aerogenes. The organisms were used to inoculate Mineral Salts Medium (MSM) supplemented with 0.2 g L-1 solution of Agbabu bitumen in dichloromethane. Cultures were inoculated at different temperature and pH (27°C/pH 3.5; 27°C/pH 5.6; 30°C/pH 7.0 and 40°C/pH 7.0) for two weeks. The quantity of bitumen degraded by each organism was determined gravimetrically at the end of first and second week. The rate of degradation was calculated for each organism and residual bitumen analyzed by infraredSpectroscopy. In the first week of incubation, Achromobacter aerogenes exhibited the highest rate of degradation (1.750±0.027 mg h-1 ) at 30°C and pH 7 while Bacillus licheniformis showed the least degradation rate (0.300±0.018 mg h-1 ) at 40°C and pH 7. Structural indices such as aromaticity, sulphonation, aliphaticity and oxidation calculated from the infrared spectra of recovered bitumen from the inoculated samples were different from that of the control. This thus, confirms the degradation capability of the bacteria used in this work on the Agbabu bitumen and hence their potentials for use in bioremediation of bitumen-polluted environments.

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“…The analysis confirms the statement that there is a strong correlation between the results obtained from the G* real part tests and LSV for the bitumen 35/50 modified with the F-T synthetic wax. It is important to note that, due to a different behaviour of polymer bitumen, the low correlation of parameter G*/sinδ according to SHRP in relation to the rutting results predication has been frequently signalled [24,25]. The level of the coefficient of determination R 2 = 0.74 in the simplest linear model revealed good correlation of the results from both tests for the modified bitumen 35/50.…”

Section: At a Temperature Of 90mentioning

confidence: 99%

“…• C and as a result aggregate grains are coated with bitumen binder at temperatures [20][21][22][23][24][25][26][27][28][29][30] • C lower than the traditional temperature of approximately 165…”

Section: Introductionmentioning

confidence: 99%

Structuring role of F-T synthetic wax in bitumen

Iwański¹,

Mazurek²

2014

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. The reduction in asphalt mixture production and placement temperatures can be achieved by modifying bitumen 35/50 with the Fischer-Tropsch synthetic wax. To identify the role this modifier plays in the bitumen 35/50, a series of tests has been performed. The experiment was carried out for wax doses from 1.5% to 4.0%. Analysis of the modified binder properties such as ductility at 5, 15 and 25• C, complex modulus G* with the parameter G*/sinδ and LSV, susceptibility according to MSCR procedure, morphology and group type analysis helped describe the structuring function of the F-T wax in the binder. The optimum F-T wax content of 2.5% has been identified to provide the desired parameters required for modified binders.

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Infrared microscopy investigation of oxidation and phase evolution in bitumen modified with polymers

Cited by 181 publications

References 17 publications

Modelling and numerical simulation of phase separation in polymer modified bitumen by phase-field method

Modelling and numerical simulation of phase separation in polymer modified bitumen by phase-field method

Preliminary Study on Biodegradation of Nigerian Natural Bitumen

Structuring role of F-T synthetic wax in bitumen

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