Evaluation on moisture sensitivity induced by dynamic pore water pressure for asphalt mixture and its components using the bending beam rheometer method

Wang, Wentao; Luo, Rong; Yan, Guannan; Wang, Linbing

doi:10.1016/j.conbuildmat.2020.118942

Cited by 11 publications

(7 citation statements)

References 13 publications

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“…In addition, progressive increase in MiST conditioning from M-35 to M-70 yielded an increase in the stripping and viscoplastic rut componenets for mixtures M1 and M7 (Figure 9). This observation is consistent with that reported by Santuci (38)(39)(40). Pore pressure build-up in asphalt mixtures has the potential to emulsify and soften asphalt binder films and therefore result in increased rutting and stripping in asphalt mixtures (38)(39)(40).…”

Section: Lwt Test Resultssupporting

confidence: 91%

“…This observation is consistent with that reported by Santuci (38)(39)(40). Pore pressure build-up in asphalt mixtures has the potential to emulsify and soften asphalt binder films and therefore result in increased rutting and stripping in asphalt mixtures (38)(39)(40). Analysis reported by Yin et al (26) could not separate total rut depth into stripping and viscoplastic component for certain mixtures with high rut depths (Figure 9).…”

Section: Lwt Test Resultssupporting

confidence: 88%

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Effectiveness of Loaded Wheel Tracking Test to Ascertain Moisture Susceptibility of Asphalt Mixtures

Akentuna

Mohammad

Sachdeva

et al. 2021

Transportation Research Record: Journal of the Transportation R

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Moisture damage of asphalt mixtures is a major distress affecting the durability of asphalt pavements. The loaded wheel tracking (LWT) test is gaining popularity in determining moisture damage because of its ability to relate laboratory performance to field performance. However, the accuracy of LWT’s “pass/fail” criteria for screening mixtures is limited. The objective of this study was to evaluate the capability of the LWT test to identify moisture susceptibility of asphalt mixtures with different moisture conditioning protocols. Seven 12.5 mm asphalt mixtures with two asphalt binder types (unmodified PG 67-22 and modified PG 70-22), and three aggregate types (limestone, crushed gravel, and a semi-crushed gravel) were utilized. Asphalt binder and mixture samples were subjected to five conditioning levels, namely, a control; single freeze–thaw-; triple freeze–thaw-; MiST 3500 cycles; and MiST 7000 cycles. Frequency sweep at multiple temperatures and frequencies, and multiple stress creep recovery tests were performed to evaluate asphalt binders. LWT test was used to evaluate the asphalt mixture samples. Freeze–thaw and MiST conditioning resulted in an increase in stiffness in the asphalt binders as compared with the control. Further, freeze–thaw and MiST conditioning resulted in an increase in rut depth compared with the control asphalt mixture. The conditioning protocols evaluated were effective in exposing moisture-sensitive mixtures, which initially showed compliance with Louisiana asphalt mixture design specifications.

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Section: Lwt Test Resultssupporting

confidence: 91%

Section: Lwt Test Resultssupporting

confidence: 88%

Effectiveness of Loaded Wheel Tracking Test to Ascertain Moisture Susceptibility of Asphalt Mixtures

Akentuna

Mohammad

Sachdeva

et al. 2021

Transportation Research Record: Journal of the Transportation R

View full text Add to dashboard Cite

show abstract

“…In particular, an indicator m / S can be derived to reflect the growth rate of creep compliance D ′( t ), as shown in Equation (9), which combines characteristics of both the creep stiffness S and creep rate m-value . The detailed derivation processes of the m / S indicator can be found in the previous research [ 12 ]. Time t is often set at a representative 60th s, and a larger m ( t )/ S ( t ) often indicates a larger D ′( t ), which means a slower increase in creep stiffness.…”

Section: Test and Analysis Methodsmentioning

confidence: 99%

“…However, more viscoelastic properties can be further explored, such as master curve of modulus, creep compliance, and relaxation modulus, based on the measured raw data in a BBR test [ 11 ]. In particular, the indicator of the ratio of creep rate m-value to creep stiffness S was found to represent the change rate of creep compliance [ 12 ], which could be applied to evaluate the erosion degree of the moisture damage of asphalt binder.…”

Section: Introductionmentioning

confidence: 99%

Rheological Behaviors and Damage Mechanism of Asphalt Binder under the Erosion of Dynamic Pore Water Pressure Environment

et al. 2022

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Asphalt binder plays an important role in the overall resistance of asphalt mixture to the moisture damage induced by a dynamic pore water pressure environment. This study evaluates the moisture sensitivity of asphalt binder from the perspective of rheological behaviors using the dynamic shear rheometer (DSR) and the bending beam rheometer (BBR) methods at high, medium, and low temperatures. The damage mechanism is further discussed quantitatively based on the Fourier transform infrared spectroscopy (FTIR) method. The results indicate that a longer conditioning duration is beneficial for asphalt binder to recover its adhesion at 60 °C in multiple stress creep recover (MSCR) tests, but the increasing pore water pressure magnitude of 60 psi held an opposite effect in this study. The asphalt binder’s fatigue life at 20 °C in linear amplitude sweep (LAS) tests decreased obviously with conditioning duration and environmental severity, but the reducing rate gradually slowed down, while the groups of 50 psi—4000 cycles and 60 psi—4000 cycles held a comparable erosion effect. Both the stiffness and relaxation moduli at −12 °C in the BBR tests exhibited an obvious decreasing trend with conditioning duration and environmental severity. The erosion effect on the asphalt binder was gradually enhanced, but it also exhibited a slightly more viscous performance. Water conditioning induced several obvious characteristic peaks in the FTIR absorbance spectra of the asphalt binder. The functional group indexes presented a trend of non-monotonic change with conditioning duration and environmental severity, which made the asphalt binder show complicated rheological behaviors, such as non-monotonic variations in performance and the abnormal improving effect induced by dynamic pore water pressure conditioning.

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“…The results showed that the tensile bond strength of asphalt mixture was decreased due to the accumulation of water at the interface. Wang et al [ 10 ] applied the bending beam rheometer method to investigate moisture’s effect on hot mix asphalt. Guo et al [ 11 ] developed an asphalt mixture model and evaluated the moisture diffusion model through finite element analysis.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Moisture on the Adhesion Energy and Nanostructure of Asphalt-Aggregate Interface System Using Molecular Dynamics Simulation

et al. 2020

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In this work, the influences of moisture intruded into the asphalt-aggregate interface have been investigated at the atomistic scale. The molecular interactions of asphalt with limestone and granite were studied using molecular dynamics (MD) simulations and the mineral surface components of limestone and granite were detected using the hyperspectral image technique. Relative concentration and radial distribution function (RDF) were employed for the characterization of asphalt component aggregations on aggregates surface. Adhesion work and debonding energy were also evaluated to investigate interface energy variations in asphalt-aggregate systems. MD results showed that the presence of interfacial moisture modified asphalt nanostructure and affected the aggregation state and distribution characteristics of asphalt components near aggregate surface. The study also demonstrated that the external moisture that intruded into the interface of the asphalt-aggregate system can decrease the concentration distribution of the asphalt components with powerful polarity on aggregate surface, reduce the adhesion works of the asphalt-aggregate interface, and decline the water damage resistance of asphalt mixture.

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Evaluation on moisture sensitivity induced by dynamic pore water pressure for asphalt mixture and its components using the bending beam rheometer method

Cited by 11 publications

References 13 publications

Effectiveness of Loaded Wheel Tracking Test to Ascertain Moisture Susceptibility of Asphalt Mixtures

Effectiveness of Loaded Wheel Tracking Test to Ascertain Moisture Susceptibility of Asphalt Mixtures

Rheological Behaviors and Damage Mechanism of Asphalt Binder under the Erosion of Dynamic Pore Water Pressure Environment

The Effect of Moisture on the Adhesion Energy and Nanostructure of Asphalt-Aggregate Interface System Using Molecular Dynamics Simulation

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