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Comparison of Different Long-Term Aging Methods for Polymer-Modified Bitumen Using Advanced Rheological Tests
https://orcid.org/http://orcid.org/0000-0002-1200-7256
Aging of asphalt binder is one of the major causes of pavement distresses such as fatigue and thermal cracking. Many laboratory aging methods, namely rotational thin film oven (RTFO) with pressure aging vessel (PAV), loose mix aging and compacted mix aging, are widely practiced to test the durability of polymer-modified binder (PMB). In this investigation, binder aging (RTFO + PAV) with three PAV durations (i.e., normal 20 h (1C-PAV), extended 40 h (2C-PAV) and 60 h (3C-PAV)), extracted binder from long-term-aged (LTA) loose mix (LMAB; 85 °C, 8 days) and LTA compacted mix (CMAB; 85 °C, 5 days) were studied. Chemical analysis of LTA binders was conducted using Fourier transform infrared spectroscopy (FTIR) test, and rheological response was evaluated using dynamic viscosity, high-temperature performance grade, Superpave rutting factor and multiple stress creep and recovery (MSCR) tests. Fatigue performance of the aged binders was evaluated using linear amplitude sweep (LAS) test and binder yield energy test (BYET). FTIR results suggested that the stiffness of PAV-aged binders is predominantly due to the development of carbonyl compounds during aging, whereas the stiffening effect of mix aging is a combination of formation of carbonyl and sulfoxide compounds and polymer degradation. Findings of this investigation suggest that the present MSCR testing procedure is unable to detect polymer degradation in LTA PMB and BYET-elastic recovery parameter is a better tool. According to LAS and BYET results, 20 h of PAV aging may overestimate fatigue performance of SBS–PMB; therefore, aging of asphalt mix may be a more practical approach.
Comparison of Different Long-Term Aging Methods for Polymer-Modified Bitumen Using Advanced Rheological Tests
https://orcid.org/http://orcid.org/0000-0002-1200-7256
Aging of asphalt binder is one of the major causes of pavement distresses such as fatigue and thermal cracking. Many laboratory aging methods, namely rotational thin film oven (RTFO) with pressure aging vessel (PAV), loose mix aging and compacted mix aging, are widely practiced to test the durability of polymer-modified binder (PMB). In this investigation, binder aging (RTFO + PAV) with three PAV durations (i.e., normal 20 h (1C-PAV), extended 40 h (2C-PAV) and 60 h (3C-PAV)), extracted binder from long-term-aged (LTA) loose mix (LMAB; 85 °C, 8 days) and LTA compacted mix (CMAB; 85 °C, 5 days) were studied. Chemical analysis of LTA binders was conducted using Fourier transform infrared spectroscopy (FTIR) test, and rheological response was evaluated using dynamic viscosity, high-temperature performance grade, Superpave rutting factor and multiple stress creep and recovery (MSCR) tests. Fatigue performance of the aged binders was evaluated using linear amplitude sweep (LAS) test and binder yield energy test (BYET). FTIR results suggested that the stiffness of PAV-aged binders is predominantly due to the development of carbonyl compounds during aging, whereas the stiffening effect of mix aging is a combination of formation of carbonyl and sulfoxide compounds and polymer degradation. Findings of this investigation suggest that the present MSCR testing procedure is unable to detect polymer degradation in LTA PMB and BYET-elastic recovery parameter is a better tool. According to LAS and BYET results, 20 h of PAV aging may overestimate fatigue performance of SBS–PMB; therefore, aging of asphalt mix may be a more practical approach.
Comparison of Different Long-Term Aging Methods for Polymer-Modified Bitumen Using Advanced Rheological Tests
https://orcid.org/http://orcid.org/0000-0002-1200-7256
Aging of asphalt binder is one of the major causes of pavement distresses such as fatigue and thermal cracking. Many laboratory aging methods, namely rotational thin film oven (RTFO) with pressure aging vessel (PAV), loose mix aging and compacted mix aging, are widely practiced to test the durability of polymer-modified binder (PMB). In this investigation, binder aging (RTFO + PAV) with three PAV durations (i.e., normal 20 h (1C-PAV), extended 40 h (2C-PAV) and 60 h (3C-PAV)), extracted binder from long-term-aged (LTA) loose mix (LMAB; 85 °C, 8 days) and LTA compacted mix (CMAB; 85 °C, 5 days) were studied. Chemical analysis of LTA binders was conducted using Fourier transform infrared spectroscopy (FTIR) test, and rheological response was evaluated using dynamic viscosity, high-temperature performance grade, Superpave rutting factor and multiple stress creep and recovery (MSCR) tests. Fatigue performance of the aged binders was evaluated using linear amplitude sweep (LAS) test and binder yield energy test (BYET). FTIR results suggested that the stiffness of PAV-aged binders is predominantly due to the development of carbonyl compounds during aging, whereas the stiffening effect of mix aging is a combination of formation of carbonyl and sulfoxide compounds and polymer degradation. Findings of this investigation suggest that the present MSCR testing procedure is unable to detect polymer degradation in LTA PMB and BYET-elastic recovery parameter is a better tool. According to LAS and BYET results, 20 h of PAV aging may overestimate fatigue performance of SBS–PMB; therefore, aging of asphalt mix may be a more practical approach.
Comparison of Different Long-Term Aging Methods for Polymer-Modified Bitumen Using Advanced Rheological Tests
Int. J. Pavement Res. Technol.
Suchismita, Arpita (author) / Singh, Dharamveer (author)
International Journal of Pavement Research and Technology ; 17 ; 1239-1256
2024-09-01
18 pages
Article (Journal)
Electronic Resource
English
Rheological properties of polymer modified bitumen from long-term field tests
| Tema Archive | 2007