Study of the Visco-Elastic Parameters of Asphalt Concrete

Mandula, Ján; Olexa, Tomáš

doi:10.1016/j.proeng.2017.05.328

Cited by 12 publications

(8 citation statements)

References 3 publications

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“…However, it declines when the fly ash additive was introduced. Such finding agrees with the test results addressed by Mandula and Olexa, (2017).…”

Section: Influence Of Additives On the Phase Anglesupporting

confidence: 93%

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Influence of Additives on the Viscoelastic Behavior of Asphalt Concrete

Sarsam¹

2022

bioex

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Implication of mineral additives into the asphalt concrete mixture can influence the viscoelastic behavior; change the density, gradation, and strength properties. In the present investigation, fly ash and silica fumes were added to the asphalt concrete mixture. Slab samples were compacted with the aid of laboratory roller, and then beam specimens were sawed from the slab samples. The asphalt concrete beam specimens were subjected to repeated flexural stresses through the four-points bending test at 20℃ and under 400 micro-strain level until failure. The influence of the additives was monitored and compared. It was concluded that the phase angle, flexural stiffness, and the fatigue life declines while the cumulative dissipated energy increases after implication of the additives. However, the silica fumes additives exhibit a significant impact on the viscoelastic properties as compared with the control or the fly ash treated mixtures.

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“…However, it declines when the fly ash additive was introduced. Such finding agrees with the test results addressed by Mandula and Olexa, (2017).…”

Section: Influence Of Additives On the Phase Anglesupporting

confidence: 93%

“…The test result revealed that adding silica fumes can improve both stability and strength. Mandula and Olexa, (2017) assessed the asphalt mixture problems which are caused by its inner properties and the behavior of material under dynamical loading. The phase angle was also studied as an indicator of viscoelastic behavior.…”

Section: Introductionmentioning

confidence: 99%

Influence of Additives on the Viscoelastic Behavior of Asphalt Concrete

Sarsam¹

2022

bioex

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“…According to the test results, the phase angle value declines up to the possible failure point after one third of the test duration, the sharp increase in the phase angle started slightly before the final failure point. Similar findings were reported by Mandula and Olexa, (2017)[1].…”

supporting

confidence: 92%

“…It also exhibits time-dependent strain. Mandula and Olexa, (2017) [1] revealed that the elasticity of asphalt concrete mixture is the result of bond stretching along crystallographic planes in an ordered solid, while the viscosity is the result of the diffusion of molecules inside an amorphous material. When the asphalt concrete mixture is subjected to sinusoidal varying stress, the resulting strain will also be sinusoidal, having the same angular frequency but retarded by a phase angle.…”

Section: Introductionmentioning

confidence: 99%

Influence of Micro-Crack Healing on Viscoelastic Properties of Moisture Damaged Asphalt Concrete

Sarsam¹

2022

CEBEL

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One of major asphalt pavement distresses is the moisture damage which influences the degradation of the viscoelastic properties of the mixture. The present work assesses the impact of practicing micro-crack healing on the viscoelastic properties of moisture damaged asphalt concrete. Roller compacted slab samples of asphalt concrete were prepared at optimum binder content. Beam specimens were obtained from the slab samples and subjected to moisture damage. Part of the asphalt concrete beam specimens were then tested under dynamic flexural stresses, while another part of the asphalt concrete beams was subjected to micro-cracks healing process using external heating at 60° C for 120 minutes, then tested under the dynamic flexural stresses. The viscoelastic properties of asphalt concrete in terms of permanent deformation, flexural stiffness, phase angle, and cumulative dissipated energy were monitored and compared among both testing conditions. It was observed that a significant increase in the flexural stiffness could be observed after healing. The increase in the phase angle after healing is significant at the early stages of loading. Higher cumulative dissipated energy could be observed for mixture which had practiced micro-crack healing. It was concluded that healing process does not exhibit positive influence on permanent deformation of moisture damaged asphalt concrete. A significant increase of 41.6 % in the flexural stiffness could be observed after healing after the first load repetition as compared with the mixture before healing. The permanent deformation after healing is higher by 22 % at failure as compared with that of mixture before healing.

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“…Asphalt mixtures are viscoelastic materials by nature, which implies that they possess both viscous and elastic properties [31][32][33]. In a viscoelastic state, the pavement has the ability to dissipate stresses through deformation.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Fatigue Resistance in Asphalt Mixtures with a Novel Additive Derived from Recycled Polymeric Fibers from End-of-Life Tyres (ELTs)

Valdes-Vidal,

Calabi-Floody,

Mignolet-Garrido

et al. 2024

Polymers

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Waste-tire textile fibers (WTTF) represent a challenge for the recycling industry since there are currently very few alternatives for their use. In this study, an evaluation of the effect of a new additive developed in two granular formats from WTTF on the fatigue behavior of asphalt mixtures was performed. For the first format of the WTTF-based additive, its effect was evaluated on hot-mix asphalt (HMA), while for the second format of the additive, the effects were evaluated on stone mastic asphalt (SMA). This second format represents an alternative that allows for the total replacement of the cellulose stabilizing additive used in the reference mix. The evaluation of fatigue damage in the mixes was performed using the four-point bending beam (4PB) test specified in European standard EN 12697-24. The test results show that the asphalt mixtures manufactured with WTTF-based additives exhibited a higher capacity to resist load cycles before failure compared to the reference mixtures. Likewise, once the asphalt mixtures were evaluated in a pavement structure by means of an empirical mechanistic analysis, the pavement structures composed of asphalt mixtures with WTTF-based additives showed significant improvements in their durability for the different load axes evaluated. For an average thickness of 15 cm of asphalt mix of a pavement-type structure, the use of the WTTF additive increases the durability of the structures by up to 129% and 112% compared to the HMA and SMA reference mixtures, respectively. These results show that both formats of the WTTF-based admixture improve the fatigue damage resistance of the HMA and SMA asphalt mixtures.

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Study of the Visco-Elastic Parameters of Asphalt Concrete

Cited by 12 publications

References 3 publications

Influence of Additives on the Viscoelastic Behavior of Asphalt Concrete

Influence of Additives on the Viscoelastic Behavior of Asphalt Concrete

Influence of Micro-Crack Healing on Viscoelastic Properties of Moisture Damaged Asphalt Concrete

Enhancing Fatigue Resistance in Asphalt Mixtures with a Novel Additive Derived from Recycled Polymeric Fibers from End-of-Life Tyres (ELTs)

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