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Influence of confinement pressure and air voids on the repeated creep and recovery of asphalt concrete mixtures
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In this article, a laboratory investigation was conducted to capture the influence of confinement pressure and specimen air voids on the creep and recovery response of asphalt concrete (AC) mixtures.Abstract:
A laboratory investigation was conducted to capture the influence of confinement pressure and specimen air voids on the creep and recovery response of asphalt concrete (AC) mixtures. AC specimens were fabricated at 2% and 7% air voids and tested at three temperatures (20, 40 and 55°C) and at unconfined and confined conditions (100 and 200 kPa). A total of 20,000 repetitions of a repeated trapezoidal loading and recovery cycle were applied. The resulting creep curves showed four distinct patterns of the three-stage creep curve depending on the loading condition and specimen density. To quantify the mechanical response during the secondary stage where the response was found to be linear, linear viscoelastic modelling was carried out. Using creep time, energy stored and energy dissipated, which were determined from model parameters; the influence of air voids and confinement pressure was quantified.read more
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Evaluation of wheel tracking and field rutting susceptibility of dense bituminous mixes
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Evaluation of rutting potential of asphalts using resilient modulus test parameters
TL;DR: In this article, the rutting potential of asphalts can be evaluated in the laboratory by different tests and any visco-elastic parameter of the mix evaluated at a high pavement temperature can be considered to be a possib...
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Synergistic influence of aging and moisture on performance of warm mix asphalt
TL;DR: In this paper, the influence of aging and moisture on the two different mechanical behaviors of warm mix asphalt was studied and the cracking and permanent deformation resistance were assessed in terms of tensile strength and flow number computed using a three stage model respectively.
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Influence of warm mix additive and loading rate on rutting of warm mix asphalt pavement
TL;DR: Two major types of warm mix asphalt (WMA) technologies exist and they are wax-based and chemical-based as mentioned in this paper, and the waxbased additive melt completely in the binder at the mixing and compaction temperatur...
Journal ArticleDOI
Influence of Confinement Pressure on the Development of Three Stage Curve for Bituminous Mixtures
TL;DR: In this paper, a trapezoidal waveform was used instead of the haversine load waveform for the flow number test, and different combinations of confinement and deviatoric loading were applied and the final choice was made based on the resulting three stage creep curve.
References
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Book
Mechanical Response of Polymers: An Introduction
TL;DR: In this paper, the authors discuss the linear response of a viscoelastic material to one-dimensional linear response, including axial load, bending, and torsion, and the boundary value problems for linear isotropic VMs.
Journal ArticleDOI
Verification and modeling of three-stage permanent deformation behavior of asphalt mixes
TL;DR: In this article, a new three-stage model is proposed to describe all three stages of asphalt mixtures and an algorithm is established to determine the model parameters from typical laboratory data.