The fracture process zone in asphalt mixture at low temperature

Li, Xinjun; Marasteanu, Mihai

doi:10.1016/j.engfracmech.2010.02.018

Cited by 143 publications

(41 citation statements)

References 14 publications

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“…These are: (i) single-edge notched beam, SE(B), specimen [2,15,16]; (ii) disc-shaped compact tension, DC(T), specimen [17][18][19]; (iii) semi-circular bending, SCB, specimen [11,[20][21][22][23]; and (iv) double-edged notched tension, DENT, specimen [12]. Among the various options, SCB testing was selected in this study because it has several benefits compared to other fracture test methods.…”

Section: Scb Tests For Fracture Propertiesmentioning

confidence: 99%

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Rate- and Temperature-Dependent Fracture Characteristics of Asphaltic Paving Mixtures

Kim

Ban

2013

Journal of Testing and Evaluation

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Cracking in asphaltic pavement layers causes primary failure of the roadway structure, and the fracture resistance and characteristics of asphalt mixtures significantly influence the service life of asphaltic roadways. A better understanding of the fracture process is considered a necessary step to the proper development of design-analysis procedures for asphaltic mixtures and pavement structures. However, such effort involves many challenges because of the complex nature of asphaltic materials. In this study, experiments were conducted using uniaxial compressive specimens to characterize the linear viscoelastic properties and semi-circular bending (SCB) specimens to characterize fracture behavior of a typical dense-graded asphalt paving mixture subjected to various loading rates and at different temperatures. The SCB fracture test was also incorporated with a digital image correlation (DIC) system and finite-element model simulations including material viscoelasticity and cohesive-zone fracture to effectively capture local fracture processes and resulting fracture properties. The test results and model simulations clearly demonstrate that: (1) the rate-and temperature-dependent fracture characteristics need to be identified at the local fracture process zone, and (2) the rate-and temperature-dependent fracture properties are necessary in the structural design of asphaltic pavements with which a wide range of strain rates and service temperatures is usually associated.

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Section: Scb Tests For Fracture Propertiesmentioning

confidence: 99%

“…However, such careful efforts to characterize the FPZ in asphalt concrete mixtures have not yet sufficiently been made. To the authors' best knowledge, only limited attempts [10][11][12][13] have been carried out because of many experimental-analytical complexities.…”

Section: Introductionmentioning

confidence: 99%

Rate- and Temperature-Dependent Fracture Characteristics of Asphaltic Paving Mixtures

Kim

Ban

2013

Journal of Testing and Evaluation

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“…However, the Superpave tests were not developed for (1) the characterization of highly modified binders, (2) the characterization of asphalt pavements containing recycled materials such as Reclaimed Asphalt Pavement (RAP) or Reclaimed Asphalt Shingles (RAS), and (3) the characterization of warm-mix materials. In addition to Superpave performance tests [8][9][10][11][12], studies conducted by several researchers [7,[13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] also provide valuable and significant insight into the estimation of asphalt materials low-temperature performance.…”

Section: Thermal Cracksmentioning

confidence: 99%

“…They concluded that the Styrene-ButadieneStyrene (SBS)-modified mixes produced less AE activity than unmodified mixes. Li et al [24][25][26][27][28] used AE techniques to characterize fracture in semi-circular bend asphalt specimens at low temperatures A great deal of research efforts has been directed towards the characterization and prevention of thermal cracks in pavement. The Superpave tests developed under the Strategic Highway Research Program (SHRP) in the 1990s have significantly improved the performance tests to assess the behavior of asphalt pavements by providing fundamental material tests over a broad range of production and service temperatures.…”

Section: Thermal Cracksmentioning

confidence: 99%

“…They concluded that the Styrene-Butadiene-Styrene (SBS)-modified mixes produced less AE activity than unmodified mixes. Li et al [24][25][26][27][28] used AE techniques to characterize fracture in semi-circular bend asphalt specimens at low temperatures (−20 • C). They also concluded that large amounts of accumulated AE events occur at 70% of material strength, that the maximum intensity of AE peaks correlates with the development of macro-cracks, and that the location of AE events suggests that a several centimeter-sized process zone forms before the peak load.…”

Section: Thermal Cracksmentioning

confidence: 99%

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Evaluation of Low-Temperature Cracking Performance of Asphalt Pavements Using Acoustic Emission: A Review

2018

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Low-temperature cracking is a major form of distress that can compromise the structural integrity of asphalt pavements located in cold regions. A review of an Acoustic Emission (AE)-based approach is presented that is capable of assessing the low-temperature cracking performance of asphalt binders and asphalt pavement materials through determining their embrittlement temperatures. A review of the background and fundamental aspects of the AE-based approach with a brief overview of its application to estimate low-temperature performance of unaged, short-term, and long-term aged binders, as well as asphalt materials, is presented. The application of asphalt pavements containing recycled asphalt pavement (RAP) and recycled asphalt shingles (RAS) materials to thermal cracking assessment is also presented and discussed. Using the Felicity effect, the approach is capable of evaluating the self-healing characteristics of asphalt pavements and the effect of cooling cycles upon their fracture behavior. Using an iterative AE source location technique, the approach is also used to evaluate the efficiency of rejuvenators, which can restore aged asphalt pavements to their original crack-resistant state. Results indicate that AE allows for relatively rapid and inexpensive characterization of pavement materials and can be used towards enhancing pavement sustainability and resiliency to thermal loading.

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Blending the Effectiveness of Anionic Polymerization with the Versatility of RAFT by Use of the Atom Transfer Radical Addition–Fragmentation Technique

Forrester

Bradley

Lin

et al. 2019

Macro Chemistry & Physics

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The efficient conversion of a living anionic polymer chain end to a macrochain transfer agent suitable for reversible addition–fragmentation chain transfer (RAFT) polymerization is reported. Conversion to the macrochain transfer agent efficiency reached as high as 97% by capping the polyanion with alcohol, coupling with α‐bromoisobutryl bromide, followed by atom‐transfer radical addition–fragmentation with bis(thiobenzyl)disulfide to add the chain transfer agent functionality. To our knowledge, this is the most efficient marriage of anionic and reversible addition–fragmentation transfer polymerization reported to date, and can be carried out under common industrial processing conditions. The combination of these polymerization methods broadens the scope of commercially accessible block copolymers by exploiting the advantages of both RAFT and anionic polymerization chemistries.

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The fracture process zone in asphalt mixture at low temperature

Cited by 143 publications

References 14 publications

Rate- and Temperature-Dependent Fracture Characteristics of Asphaltic Paving Mixtures

Rate- and Temperature-Dependent Fracture Characteristics of Asphaltic Paving Mixtures

Evaluation of Low-Temperature Cracking Performance of Asphalt Pavements Using Acoustic Emission: A Review

Blending the Effectiveness of Anionic Polymerization with the Versatility of RAFT by Use of the Atom Transfer Radical Addition–Fragmentation Technique

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