Evaluation of asphalt mixture laboratory long-term ageing methods for performance testing and prediction

Elwardany, Michael D.; Rad, Farhad Yousefi; Castorena, Cassie; Kim, Youngsoo Richard

doi:10.1080/14680629.2016.1266740

Cited by 88 publications

(58 citation statements)

References 16 publications

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“…In recent studies on asphalt mixtures, the researchers indicated that nonuniform field aging of asphalt mixtures over depth and the surface of the asphalt pavement is found to be aged faster than the bottom [34,137]. Embrittlement of asphalt mixture due to aging was reported by Rahmani et al [38] and Elwardany et al [138]. Brittleness increases with conditioning period under all aging modes, and over time in in-field service conditions [139].…”

Section: Binder Studiesmentioning

confidence: 94%

“…However, in the compacted specimen, existence of oxidation gradient in radial direction and along the height of specimen was reported [27]. Hence, researchers [90,138,[146][147][148][149] sometimes preferred conditioning loose mixture at elevated temperature due to homogeneity and efficiency of aging. However, compacting loose mix conditioned sample often was found to be problematic as mixture become too stiff due to loss of volatility of binder [148].…”

Section: Long-term Aging Protocolmentioning

confidence: 99%

“…Loose mixture aging temperature more than 135°C results in a significant change in the relationship between asphalt binder rheology and chemistry and affects the mixture performance [151]. e optimal loose mixture aging temperature of 95°C is suggested by the researchers [138].…”

Section: Long-term Aging Protocolmentioning

confidence: 99%

“…A number of studies [90,138,146,147,149,152] showed that the long-term aging protocol can vary depending on the climatic conditions, laboratory aging method, laboratory aging temperature, or asphalt type. Furthermore, most of these studies only estimate the long-term aging of asphalt mixture without proper validation with field results, especially in the component level.…”

Section: Long-term Aging Protocolmentioning

confidence: 99%

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State of the Art Study on Aging of Asphalt Mixtures and Use of Antioxidant Additives

Şirin

Paul

Kassem

2018

Advances in Civil Engineering

143

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e detrimental effects of hardening in asphalt pavements were first recognized by pioneering pavement engineers in the 1900s and have been studied extensively during the last 70 years. is hardening process, referred to as asphalt aging, is generally defined as change in the rheological properties of asphalt binders/mixtures due to changes in chemical composition during construction and its service life period. Aging causes the asphalt material to stiffen and embrittle, which affects the durability and leads to a high potential for cracking. is paper presents the state of the art on asphalt and asphalt mixture aging and use of antioxidant additives to retard the aging. A picture of complex molecular structure of asphalt and its changes due to atmospheric condition and various protocols used to simulate aging in laboratory environment are also discussed. Emphasis is given on recent studies on simulation of aging of asphalt mixtures as there has been limited research on mixtures compared to the asphalt binder. Finally, this paper presents the application of antiaging techniques and its mechanism, use of various types of antioxidant additives to retard aging of asphalt and, hence, improve the performance of asphalt pavements.

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Section: Binder Studiesmentioning

confidence: 94%

Section: Long-term Aging Protocolmentioning

confidence: 99%

Section: Long-term Aging Protocolmentioning

confidence: 99%

Section: Long-term Aging Protocolmentioning

confidence: 99%

See 2 more Smart Citations

State of the Art Study on Aging of Asphalt Mixtures and Use of Antioxidant Additives

Şirin

Paul

Kassem

2018

Advances in Civil Engineering

143

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“…Under the rapid variation in temperature, the thin layers of the asphalt pavement will face a high thermal stress, and suffer from fatigue cracking induced by temperature. To evaluate the flexural-tensile performance of asphalt mixture in China's cold regions, it is necessary to build a flexural-tensile strength prediction model for asphalt in such regions under cyclic thermal stress [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

A Backpropagation Neural Network-based Flexural-tensile Strength Prediction Model for Asphalt Mixture in Cold Regions under Cyclic Thermal Stress

Qin¹,

Zheng²

2019

MMEP

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This paper attempts to disclose how the varying cold season temperature affects the performance of asphalt mixture i=n cold regions, and create a model to predict the flexuraltensile strength under cyclic thermal stress. For this purpose, the author investigated the influencing factors of asphalt mixture performance in cold regions, such as temperature level and variation in temperature difference, and employed the backpropagation neural network (BPNN) to learn, train and verify 120 samples of SBS AC-13 database. On this basis, a BPNN-based prediction model was established for the flexural-tensile strength of asphalt mixture under cyclic thermal stress. Next, the predicted results were compared with the actual results through regression analysis. The comparison shows that our model output a correlation coefficient (R) of 0.9706, an evidence for good prediction accuracy. This means our model can effectively predict the flexural-tensile strengths of asphalt mixture under cyclic thermal stress in cold regions. The research findings provide a good reference for similar studies on asphalt mixture.

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Evaluation of Viscoelastic Properties and Cracking Behaviour of Asphalt Mixtures with Laboratory Aging

2018

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Evaluation of asphalt mixture laboratory long-term ageing methods for performance testing and prediction

Cited by 88 publications

References 16 publications

State of the Art Study on Aging of Asphalt Mixtures and Use of Antioxidant Additives

State of the Art Study on Aging of Asphalt Mixtures and Use of Antioxidant Additives

A Backpropagation Neural Network-based Flexural-tensile Strength Prediction Model for Asphalt Mixture in Cold Regions under Cyclic Thermal Stress

Evaluation of Viscoelastic Properties and Cracking Behaviour of Asphalt Mixtures with Laboratory Aging

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