Evaluation of Low Temperature Properties of Rubberized Asphalt Mixtures

Pszczoła, Marek; Jaczewski, Mariusz; Szydłowski, Cezary; Judycki, Józef; Dołżycki, Bohdan

doi:10.1016/j.proeng.2017.02.098

Cited by 35 publications

(20 citation statements)

References 9 publications

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“…The process of mixing described above is used for the specific additive only during laboratory phase because during full scale production it is added directly to the mixing chamber of the asphalt plant and mixed with dry aggregate for 8-10 seconds, before liquid bitumen is added. Any kind of rubber modification improves asphalt mixture properties, especially in the field of low-temperature cracking [4, 13,15,16,18,23].…”

Section: Additives To Asphalt Mixturementioning

confidence: 99%

Influence of bitumen type on cracking resistance of asphalt mixtures used in pavement overlays

Jaskuła

Szydłowski

Stienss

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Section: Additives To Asphalt Mixturementioning

confidence: 99%

Influence of bitumen type on cracking resistance of asphalt mixtures used in pavement overlays

Jaskuła

Szydłowski

Stienss

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Section: R -Rubber Modificationmentioning

confidence: 99%

“…This can be achieved by various means: by selecting a certain type of the binder and its amount, type and gradation size of the aggregate mixture and also by incorporating different additives into the binder or asphalt mixture as a whole, e.g. polymers, recycled rubber, fibres or natural bitumen [3, 10,11,15,17,27].…”

Section: Introductionmentioning

confidence: 99%

Influence of bitumen type on cracking resistance of asphalt mixtures used in pavement overlays

Jaskuła

Szydłowski

Stienss

2018

TO - PK

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Cracking is one of the predominant distresses occurring in flexible pavements, especially in old pavements that were rehabilitated with an asphalt overlay. In such cases asphalt mixtures should be designed to ensure high resistance to reflective cracking because new asphalt layers are exposed to existing cracks of the old pavement. The nature of these cracks can be various (transverse, longitudinal as well as crazy cracking). One factor that minimizes this type of distress is the proper mix design process, which should involve selection of specific bitumen binder and mineral mix gradation. However, still there is no universally adopted laboratory test method that would allow to clearly assess resistance of asphalt mixtures to reflective cracking. This paper describes the usage of one of the devices developed to test asphalt mixtures in terms of such distress -Texas Overlay Tester. For this test, samples prepared in laboratory conditions (i.e. compacted with the use of Superpave Gyratory Compactor) as well as obtained in the field (by core drilling) can be used. The results are obtained not only quickly and easily, but also with sufficient repeatability. The described method characterizes both crack initiation and crack propagation properties of asphalt mixtures. In this work one type of mineral mixture was tested with 4 different types of bitumen (one neat bitumen, two ordinary polymer-modified and one polymer-modified with high polymer content). For selected cases extra additives (rubber and loose fibres) were also tested. In total, six asphalt mixtures were tested. A ranking of the used binders was created on the basis of the results in order to conclude which bitumen would ensure the best performance characteristics in terms of reflective cracking. The results have clearly shown that deliberate choice of the binder used in the asphalt mixture for the overlay will significantly improve its reflective cracking resistance or even fatigue resistance.

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“…is performance is attributed to several factors such as decrease in stiffness of rubber asphalt at low temperature due to improvement in aging susceptibility of the asphalt binder; low sensitivity of rubber to low temperature; and good elasticity properties [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Silicone Oil on Dispersion and Low-Temperature Fracture Performance of Crumb Rubber Asphalt

Lushinga

Cao

Zhang

2019

Advances in Materials Science and Engineering

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Low-temperature cracking is one of the major pavement distresses in cold regions. To reduce the prevalence of such cracks, crumb rubber modified asphalt (CRMA) has been applied for a long time. However, CRMA experiences compatibility and segregation problems with asphalt. Silicone oil has long been seen to improve compatibility and segregation problems of polymers in asphalt, but its benefits on low temperature performance of crumb rubber asphalt have not been explored. Furthermore, silicone oil can be obtained as virgin or recycled from industrial transformers; however, the recycled silicone oil’s influence on low-temperature crack performance of asphalt has also not been explored. Therefore, the purpose of this study was to investigate the effect of recycled silicone oil (SO) on dispersion and low-temperature fracture performance of crumb rubber asphalt. The fracture mechanics-based single-edge notch beam (SENB) test was performed at temperatures of −12°C, −18°C, and −24°C. In addition, fluorescence microscopy (FM), atomic force microscopy (AFM), and Fourier-transform infrared (FTIR) experiments were also conducted. Results show that the addition of SO to CRMA increases displacement, fracture energy, and fracture toughness at low temperature while it decreases stiffness which reduces cracking. In addition, AFM results show that surface roughness increases with the addition of SO which indicates that bonding of asphalt and rubber particles had also improved. FM also confirmed that dispersion of rubber particles had improved with addition of silicone oil. FTIR results revealed that asphalt samples with SO treatment were hydrophobic which potentially repels water ingress and delays the freezing of asphalt. Lastly, statistical analysis revealed that the influence of silicone oil on low-temperature performance of rubber asphalt was significant. Therefore, the study concluded that fracture cracking resistance is improved by addition of silicone oil to crumb rubber asphalt.

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Evaluation of Low Temperature Properties of Rubberized Asphalt Mixtures

Cited by 35 publications

References 9 publications

Influence of bitumen type on cracking resistance of asphalt mixtures used in pavement overlays

Influence of bitumen type on cracking resistance of asphalt mixtures used in pavement overlays

Influence of bitumen type on cracking resistance of asphalt mixtures used in pavement overlays

Effect of Silicone Oil on Dispersion and Low-Temperature Fracture Performance of Crumb Rubber Asphalt

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