Evaluation of asphaltenes a potential alternative for cement in stabilized base courses using asphalt emulsion
Stabilization of pavement base material using asphalt emulsion has been widely used to improve pavement performance. This technology produces a high-quality base course material with decreased energy consumption, carbon footprint, and raw material usage. Cement has been used as a common additive to...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Cleaner Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772397623000412 |
| _version_ | 1797389371853242368 |
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| author | Farshad Kamran Leila Hashemian |
| author_facet | Farshad Kamran Leila Hashemian |
| author_sort | Farshad Kamran |
| collection | DOAJ |
| description | Stabilization of pavement base material using asphalt emulsion has been widely used to improve pavement performance. This technology produces a high-quality base course material with decreased energy consumption, carbon footprint, and raw material usage. Cement has been used as a common additive to improve these mixes strength and moisture resistance. However, some drawbacks are also associated with cement, such as negative environmental impacts, high costs, and low-temperature deficiencies. Asphaltenes is a by-product of oil-sand bitumen with little commercial value in current practice. To investigate the impact of asphaltenes on improving the rheological properties of asphalt binder, a series of binder characteristics tests using a dynamic shear rheometer, breaking time and microscopic evaluation is conducted on modified asphalt emulsion with asphaltenes. Asphaltenes is then added to asphalt emulsion-stabilized granular material, to be compared with mixtures prepared with cement. Two asphaltenes and cement-modified mixes are prepared and compared to unmodified mixtures. All mixes are tested for permanent deformation and moisture sensitivity using a Hamburg wheel tracker and flow number test, while the low-temperature properties are evaluated using indirect tensile strength tests. Dynamic modulus is also evaluated to analyze the viscoelastic behavior of the mixes. The results of this study reveal a considerable increase in the rutting resistance of asphalt mixes by adding 1% of both additives (by total weight of mix), and asphaltenes-modification shows less adverse impacts at intermediate and low temperatures than cement-modification. |
| first_indexed | 2024-03-08T22:56:00Z |
| format | Article |
| id | doaj.art-d1a8f312aded43d5bc9806d2cd1c6fc2 |
| institution | Directory Open Access Journal |
| issn | 2772-3976 |
| language | English |
| last_indexed | 2024-03-08T22:56:00Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Cleaner Materials |
| spelling | doaj.art-d1a8f312aded43d5bc9806d2cd1c6fc22023-12-16T06:11:10ZengElsevierCleaner Materials2772-39762023-12-0110100208Evaluation of asphaltenes a potential alternative for cement in stabilized base courses using asphalt emulsionFarshad Kamran0Leila Hashemian1Department of Civil & Environmental Engineering, University of Alberta, Edmonton, CanadaDepartment of Civil & Environmental Engineering, University of Alberta, Edmonton, Canada; Corresponding author at: 255, Donadeo Innovation Centre for Engineering, 9211 116th Street NW, University of Alberta, Edmonton, AB T6G 1H9, CanadaStabilization of pavement base material using asphalt emulsion has been widely used to improve pavement performance. This technology produces a high-quality base course material with decreased energy consumption, carbon footprint, and raw material usage. Cement has been used as a common additive to improve these mixes strength and moisture resistance. However, some drawbacks are also associated with cement, such as negative environmental impacts, high costs, and low-temperature deficiencies. Asphaltenes is a by-product of oil-sand bitumen with little commercial value in current practice. To investigate the impact of asphaltenes on improving the rheological properties of asphalt binder, a series of binder characteristics tests using a dynamic shear rheometer, breaking time and microscopic evaluation is conducted on modified asphalt emulsion with asphaltenes. Asphaltenes is then added to asphalt emulsion-stabilized granular material, to be compared with mixtures prepared with cement. Two asphaltenes and cement-modified mixes are prepared and compared to unmodified mixtures. All mixes are tested for permanent deformation and moisture sensitivity using a Hamburg wheel tracker and flow number test, while the low-temperature properties are evaluated using indirect tensile strength tests. Dynamic modulus is also evaluated to analyze the viscoelastic behavior of the mixes. The results of this study reveal a considerable increase in the rutting resistance of asphalt mixes by adding 1% of both additives (by total weight of mix), and asphaltenes-modification shows less adverse impacts at intermediate and low temperatures than cement-modification.http://www.sciencedirect.com/science/article/pii/S2772397623000412Asphalt emulsionCementStabilizationHamburg wheel trackingAsphaltenesLow-temperature, dynamic modulus |
| spellingShingle | Farshad Kamran Leila Hashemian Evaluation of asphaltenes a potential alternative for cement in stabilized base courses using asphalt emulsion Cleaner Materials Asphalt emulsion Cement Stabilization Hamburg wheel tracking Asphaltenes Low-temperature, dynamic modulus |
| title | Evaluation of asphaltenes a potential alternative for cement in stabilized base courses using asphalt emulsion |
| title_full | Evaluation of asphaltenes a potential alternative for cement in stabilized base courses using asphalt emulsion |
| title_fullStr | Evaluation of asphaltenes a potential alternative for cement in stabilized base courses using asphalt emulsion |
| title_full_unstemmed | Evaluation of asphaltenes a potential alternative for cement in stabilized base courses using asphalt emulsion |
| title_short | Evaluation of asphaltenes a potential alternative for cement in stabilized base courses using asphalt emulsion |
| title_sort | evaluation of asphaltenes a potential alternative for cement in stabilized base courses using asphalt emulsion |
| topic | Asphalt emulsion Cement Stabilization Hamburg wheel tracking Asphaltenes Low-temperature, dynamic modulus |
| url | http://www.sciencedirect.com/science/article/pii/S2772397623000412 |
| work_keys_str_mv | AT farshadkamran evaluationofasphaltenesapotentialalternativeforcementinstabilizedbasecoursesusingasphaltemulsion AT leilahashemian evaluationofasphaltenesapotentialalternativeforcementinstabilizedbasecoursesusingasphaltemulsion |