Exploring the Observed Rheological Behaviour of In-Situ Aged and Fresh Bitumen Employing the Colloidal Model Proposed for Bitumen

Laukkanen, Olli-Ville; Pellinen, Terhi; Makowska, Michalina

doi:10.1007/978-94-007-6878-9_14

Cited by 8 publications

(8 citation statements)

References 26 publications

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“…The increased elasticity of the binder creates a potential risk for damages to the HIP-RC treated pavements and, what is especially crucial in cold region engineering; it is hypothesized to increase susceptibility to thermal cracking. Our field study (Laukkanen et al 2013) verifies findings by Redelius and Soenen (2005) that in situ aging is increasing the elasticity of the binder. But how this increased elasticity is affecting the thermal properties and the healing properties is not yet quite understood although thermal cracking may increase as there is less viscous flow and healing.…”

Section: Bitumen Analysis and Selection Of Rejuvenating Methodssupporting

confidence: 90%

Development of Specifications and Guidelines for Hot in-Place Recycling in Finland—Outline and Framework

Makowska

Pellinen

2015

RILEM Bookseries

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For 25 years, the hot in-place recycling (HIP-RC) has been the major pavement preservation technique in high volume roads in Finland, and currently it constitutes ca. 50 % of all road construction expenditures. The cost is ca. half of the mill and fill overlay as only up to 25 % new material is consumed. With least traffic disruption, it provides a quick refill of the rutted pavement, which is abraded due to the use of studded tires. Studded tires are used for mitigating icy roads conditions in the wintertime. However, the reduced maintenance funding has created a need to re-evaluate and better standardize the method. Therefore, a REMIX research project has been initiated, which focuses on the identification of best practices for the HIP-RC by reviewing prior construction records and their usability for the planning of future recycling and by developing enhanced performance criteria for the end product. The four-year project closely follows roads at different stages in their life cycle, which gives a unique opportunity to observe and study pavement surfaces recycled multiple times. This article presets outline and framework for the project and gives results from the initial stage of the project.

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Section: Bitumen Analysis and Selection Of Rejuvenating Methodssupporting

confidence: 90%

Development of Specifications and Guidelines for Hot in-Place Recycling in Finland—Outline and Framework

Makowska

Pellinen

2015

RILEM Bookseries

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“…Application of G c for calculating PDI was investigated by Zeichner and Patel who presented a relationship between the crossover modulus of polypropylene melts and molecular weight distribution . Even though asphalt molecular structure differs from that of polymers, its asphaltene portion (heptane insoluble) which is the focus of this paper is composed of self-assembled nanoaggregates of few nanometers in size with a molecular weight of approximately 750 g/mol. , The PDI has been also correlated to the point where a sol–gel shift occurs in asphaltene-rich bitumen. , …”

Section: Results and Discussionmentioning

confidence: 99%

Fused Aromatics To Restore Molecular Packing of Aged Bituminous Materials

Pahlavan

Hosseinnezhad

Samieadel

et al. 2019

Ind. Eng. Chem. Res.

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This study incorporates computational and laboratory experiments to determine specific interaction mechanisms between conjugated structures (interrupted and continuous conjugates) and selected polyaromatics hydrocarbons (PAH) stacks such as those found in oxidized asphaltene molecules. The theoretical results obtained by quantum-mechanical calculations and molecular dynamics simulations show that both continuous and interrupted conjugates are effective to weaken the π-intersheet forces and decrease the size of PAH nanoaggregates, with interrupted conjugates being more efficient than continuous conjugates to exfoliate PAH stacks. Owing to their limited partial entrance into the PAH stacks, interrupted conjugates are not trapped inside the PAH interlayer, and can easily detach from the stacks. This allows an interrupted conjugate not to be consumed in interaction with one PAH stack, making the interrupted conjugate available to affect many other stacks in the matrix. The higher exfoliation capacity of the interrupted aromatic conjugates is also evidenced in the results of our experiments based on UV−vis and rheometry analyses. This is reflected in a higher reduction in the polydispersity index and a higher increase in both the crossover frequency and crossover modulus of aged bitumen (containing stacks of large PAH referred to as asphaltene nanoaggregates) when it is doped with an interrupted conjugate (fluoranthene) compared to when it is doped with a continuous conjugate (pyrene). The study results contribute to the body of knowledge by providing an in-depth understanding of how variation in the π-electron distribution of conjugated structures affects their efficacy to exfoliated self-assembled stacked structures of polyaromatic hydrocarbons such as asphaltenes.

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“…However, those findings do not completely agree with the conventional test results, and the findings need to be further studied. More information about the binder studies can be found elsewhere (12,13).…”

Section: Dsr Results and Conventional Propertiesmentioning

confidence: 99%

“…5-8), and crushed rock (No. [8][9][10][11][12][13][14][15][16] in the ratio of 15:10:66. Additionally, 9% LS filler was to be added.…”

Section: Mixture Compositionmentioning

confidence: 99%

Analytical Methodology to Determine the Composition of Filler Used in Hot-Mix Asphalt

Makowska

Pellinen

Martinez

et al. 2014

Transportation Research Record: Journal of the Transportation R

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For more understanding about asphalt pavement deterioration in Finland, a premature failure of major arterial Ring Road II surface layers was investigated. Documentation of mix design (MD), construction, and material quality analysis, before and after construction, was reviewed and compared with samples collected from the road. The traditional quality assessment of the pavement by means of binder content and aggregate gradation analysis, air void content, and indirect tensile stiffness and strength, as well as binder tests (penetration, ring and ball softening point, and dynamic shear rheometer), did not provide information on the possible reasons for failure. A discrepancy was then found in the filler composition; the discovery was made by applying the standard analytical procedure of hydrochloric acid solubility, coupled with material composition simulations. This finding (and forensic technique) was positively verified by means of thermogravimetral analysis and X-ray diffraction. Scanning electron microscopy, supported by the BET-adsorption (Brunauer–Emmet–Teller) surface area measurements, suggested that, between the stage of MD and construction, the limestone filler was substituted with a mixture of limestone and fly ash. The filler blends were reconstructed on the basis of the MD report and established forensic laboratory findings. The comparative analysis of reconstructed fillers, by means of Fourier transform infrared spectrom-etry, verified that an almost ideal match was obtained with the latter. Alteration of construction material is suggested as the main reason for discrepancies between the MD and actual properties of the analyzed performance of the wearing course.

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Exploring the Observed Rheological Behaviour of In-Situ Aged and Fresh Bitumen Employing the Colloidal Model Proposed for Bitumen

Cited by 8 publications

References 26 publications

Development of Specifications and Guidelines for Hot in-Place Recycling in Finland—Outline and Framework

Development of Specifications and Guidelines for Hot in-Place Recycling in Finland—Outline and Framework

Fused Aromatics To Restore Molecular Packing of Aged Bituminous Materials

Analytical Methodology to Determine the Composition of Filler Used in Hot-Mix Asphalt

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