Generation and propagation of reflective cracking and thermal cracking of asphalt pavement in cold regions of China

Zhou, Wei; Chen, Z.G.; Chen, Z.N.; Wang, Qin; Jiang, Yi

doi:10.1201/9781003222880-8

Cited by 2 publications

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“…Asphalt binders exhibit both linear and nonlinear viscoelastic behavior based on the levels of stress and strain they experience [ 3 ]. The viscoelasticity of asphalt decreases significantly at low temperatures, which can lead to thermal cracking in older asphalt binders that have higher stiffness [ 4 ]. A more in-depth study of the molecular structure of bitumen reveals that the glass transition occurs at a low temperature, resulting in time-dependent hardening and higher stiffness [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Laboratory Evaluation of Asphalt Binders Containing Styrene-Butadiene-Styrene (SBS) and Processed Oil

et al. 2023

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The study presents an experimental evaluation to improve the resistivity of binders with “Styrene-Butadiene-Styrene” (SBS) and “Processed oil” by studying the physical properties, rheology, and cracking. For this experiment, PG 64-22 was mixed with SBS at different percentages of 5%, 10%, and 15% by weight of the original binder with two processed oil contents of 6% and 12% by weight of the binder. Laboratory tests have been conducted at various high, medium, and low temperature ranges to evaluate their properties. The processed oil polymer modified asphalt (PMA) binder is artificially aged in both the short and long-term using a Rolling Thin Film Oven (RTFO) and a Pressure Aging Vessel (PAV). The Superpave testing method was performed on modified binders using a Rotational Viscometer (RV), Dynamic Shear Rheometer (DSR), and Bending Beam Rheometer (BBR). The results of this study illustrate (1) The addition of SBS leads to higher viscosity, but the co-modification of asphalt binder with the processed oil shows a significant modulation of the viscosity value. (2) In addition, processed oil reduced the resistance to rutting, but the addition of SBS significantly improved the rutting resistance of the asphalt binder. (3) The addition of SBS and processed oil improved the value of G sin δ, notably. (4) According to BBR, it has been shown that the addition of SBS in addition to the processed oil improves the stiffness values of modified asphalt binders.

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Section: Introductionmentioning

confidence: 99%

Laboratory Evaluation of Asphalt Binders Containing Styrene-Butadiene-Styrene (SBS) and Processed Oil

et al. 2023

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“…On the other hand, thermal cracking occurs due to a loss of viscoelasticity in the asphalt binder’s molecular structure at low temperatures and under tensile stress and traffic load, especially in older pavements [ 5 ]. In accordance with the glass transition of asphalt binders at low temperatures, time-dependent hardening occurs due to changes in the asphalt’s molecular structure [ 6 ]. The viscosity of old asphalt binders increases due to the transition of aromatics to asphaltene components, resulting in higher stiffness or lower viscoelasticity and higher viscosity.…”

Section: Introductionmentioning

confidence: 99%

Effect of Processed Oil on Asphalt Binder Properties

et al. 2022

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This study investigates the effectiveness of processed oil in the modification of PG 64-22 and PG 76-22 by assessing their physical and rheological properties, and multiple comparison was conducted between the two binders. The base binders PG 64-22 and PG 76-22 were blended with processed oil at four different percentages of contents (3%, 6%, 9% and 12% by the weight of the binder) and compared with the control binder in each test. The base and modified binders were artificially short-term and long-term aged using a rolling thin film oven (RTFO) and pressure aging vessel (PAV) procedures. Superpave binder tests were performed on the modified binders by applying a rotational viscometer (RV), dynamic shear rheometer (DSR), and bending beam rheometer (BBR). The comparisons and results presented in this study indicate that (1) the processed oil has a significant effect on the binders’ viscosity, which changes with respect to the increment of processed oil content. The viscosity of both modified binders decreased with the addition of 3, 6, 9 and 12% processed oil; (2) the performed DSR test showed that the addition of processed oil had a negative effect on the rutting resistance for both binders, since in PG 64-22, G*/Sin δ values decreased by 55, 65, 75 and 83% with the addition of 3, 6, 9 and 12% processed oil, respectively, while a decrement of G*/Sin δ of 24, 45, 58 and 65% with the addition of 3, 6, 9 and 12% processed oil was observed in PG 76-22; meanwhile, the fatigue cracking performance was improved and was found to be effective, while G* Sin δ in PG76-22 decreased by 9, 30, 36, and 52% and in PG 64-22 by 27, 44, 53, and 67% with the addition of 3, 6, 9 and 12% processed oil; (3) the results from the BBR test indicate significant improvement in the thermal cracking properties of the binders. The addition of 3, 6, 9 and 12% processed oil resulted in a decrease in the stiffness of both the PG 64-22 and PG 76-22 binders, with a positive effect consequently being observed on the m-values of the binders.

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Generation and propagation of reflective cracking and thermal cracking of asphalt pavement in cold regions of China

Cited by 2 publications

References 0 publications

Laboratory Evaluation of Asphalt Binders Containing Styrene-Butadiene-Styrene (SBS) and Processed Oil

Laboratory Evaluation of Asphalt Binders Containing Styrene-Butadiene-Styrene (SBS) and Processed Oil

Effect of Processed Oil on Asphalt Binder Properties

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