Application of time–temperature superposition to develop master curves of cumulative plastic strain in repeated load permanent deformation tests

Khosravifar, Sadaf; Haider, Intikhab; Afsharikia, Zahra; Schwartz, Charles W.

doi:10.1080/10298436.2014.937810

Cited by 17 publications

(2 citation statements)

References 14 publications

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“…A higher slope relative to other mixtures indicates a mixture that is likely to be more susceptible to rutting. The intercept of the line is indicative of the plastic strain at cycle N = 1 ( 10 , 11 ).…”

Section: Methodsmentioning

confidence: 99%

Performance of Virginia’s Early Foamed Warm Mix Asphalt Mixtures

Diefenderfer

2018

Transportation Research Record: Journal of the Transportation R

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The Virginia Department of Transportation began allowing the use of warm mix asphalt (WMA) in 2008. Although several WMA technologies were investigated prior to implementation, foamed WMA was not. This study evaluated the properties and performance of foamed WMA placed during the initial implementation of the technology to determine whether the technology had performed as expected. Six mixtures produced using plant foaming technologies and placed between 2008 and 2010 were identified and subjected to field coring and laboratory testing. Coring was performed in 2014, resulting in pavement ages from 4 to 6 years. Three comparable hot mix asphalt (HMA) mixtures were cored at 5 years for comparison. Cores were evaluated for air-void contents and permeability and were subjected to dynamic modulus, repeated load permanent deformation, and overlay testing. In addition, binder was extracted and recovered for performance grading. Similar properties were found for the WMA and HMA mixtures. One WMA mixture had high dynamic modulus and binder stiffness, but overlay testing did not indicate any tendency for premature cracking. All binders had aged between two and three performance grades above that specified at construction. WMA binders and one HMA binder aged two grades higher, and the remaining two HMA binders aged three grades higher, indicating a likely influence on aging of the reduced temperatures at which the early foamed mixtures were typically produced. Overall results indicated that foamed WMA and HMA mixtures should be expected to perform similarly.

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Section: Methodsmentioning

confidence: 99%

Performance of Virginia’s Early Foamed Warm Mix Asphalt Mixtures

Diefenderfer

2018

Transportation Research Record: Journal of the Transportation R

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“…A nonlinear optimization program in 1stOpt software was used to determine the master curve coefficients. Using the dynamic modulus test results measured at three different temperatures and six different loading frequencies, the master curves of recycled mixtures based on the time-temperature superposition principle were constructed for a reference temperature of 20 • C [27]. The sigmoidal function is used to fit and develop the master curve, as provided in Equation (4).…”

Section: Dynamic Modulus Testmentioning

confidence: 99%

Laboratory Evaluation of Rejuvenating Agent on Reclaimed SBS Modified Asphalt Pavement

et al. 2017

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Abstract:To evaluate the effect of rejuvenating agent on reclaimed SBS (styrene-butadiene-styrene) modified asphalt pavement (RSMAP) material, different tests of asphalt and mixtures were conducted. Firstly, the improvement effect of rejuvenating agents on the aged modified asphalt was tested at macroscopic and microscope level. Then the properties of hot mix asphalt (HMA) with different RSMAP contents (0%, 30%, 50% and 70%) were evaluated by conducting freeze-thaw split, semi-circular bending (SCB) and dynamic modulus (DM). The results indicate that rejuvenating agent can recycle the properties of aged modified asphalt effectively. The initial phase structure of the aged modified asphalt is not changed by adding rejuvenating agents. Moreover, the SBS particles area ratio of modified asphalt blends is significantly correlated with tenacity as the proportion of rejuvenating agent increases. For mixtures, RSMAP is harmful to moisture susceptibility and low-temperature cracking resistance of recycled mixture, especially with high RSMAP content. Moreover, the two properties can be improved by adding rejuvenating agents, but the recycled mixtures with high RSMAP content are not easy to recover to HMA mixture level. In general, the rejuvenating agent has an effect on the stiffness of the recycled mixture, but this is effect not obvious. When loading frequency reaches a higher value, the DM of recycled mixtures and HMA mixture tend to be consistent including high RSMAP content.

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Influence of asphalt binder on time-temperature shift function for asphalt concrete at large strains

Chompoorat

Likitlersuang

2016

KSCE Journal of Civil Engineering

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Application of time–temperature superposition to develop master curves of cumulative plastic strain in repeated load permanent deformation tests

Cited by 17 publications

References 14 publications

Performance of Virginia’s Early Foamed Warm Mix Asphalt Mixtures

Performance of Virginia’s Early Foamed Warm Mix Asphalt Mixtures

Laboratory Evaluation of Rejuvenating Agent on Reclaimed SBS Modified Asphalt Pavement

Influence of asphalt binder on time-temperature shift function for asphalt concrete at large strains

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