Effects of truck traffic on top-down fatigue cracking performance of flexible pavements using a new mechanics-based analysis framework

Dinegdae, Yared; Birgisson, Björn

doi:10.1080/14680629.2016.1251958

Cited by 22 publications

(12 citation statements)

References 14 publications

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“…It is well known that the short-term aging during mix production and laydown directly determines the starting point of the long-term field aging. Incorrect predictions of the effects of short-term aging may lead to the erroneous prediction of both the short and longterm aged binder properties and further affect the prediction of the long-term asphalt mixture properties and pavement performance [22][23][24]. This paper presents a new short-term asphalt aging predictive model for asphalt binders.…”

Section: Motivation and Objectivesmentioning

confidence: 99%

A new short-term aging model for asphalt binders based on rheological activation energy

et al. 2019

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Short-term aging of asphalt binders is an inevitable phenomenon during mix production and laydown that significantly affects the rheological properties of asphalt binders and further contributes to the deterioration of pavement performance. This paper presents a new short-term aging model for asphalt binders. The new model focuses on the binder viscosity as the target property and incorporates the rheological activation energy for the model development. It consists of four model coefficients and two essential binder specific inputs (i.e. viscosity and rheological activation energy of the unaged asphalt binder). The rheological activation energy is calculated from the conventional properties of unaged asphalt binders like penetration, kinematic viscosity, and absolute viscosity measured at various temperatures or from the known Viscosity Temperature Susceptibility parameters (i.e. ''A-VTS'' values) of unaged asphalt binders. The global model coefficients are determined using data extracted from the longterm pavement performance database. The short-term aging is verified to increase the rheological activation energy of the asphalt binder to a certain amount which is linearly proportional to that of the unaged binder. It is also found that the new model delivers more accurate viscosity prediction capabilities over the existing binder aging model. The new model is then validated through data collected from multiple independent data sources. The validation results indicate that the new model provides fairly accurate predictions in both laboratory and field short-term aging. Thus, it can be concluded that the new model is a good candidate for the short-term aging prediction. Keywords Short-term aging Á Viscosity Á Rheological activation energy Á Asphalt binder 1 Introduction Aging is a phenomenon that affects the physical properties, rheological properties as well as the Electronic supplementary material The online version of this article (

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Section: Motivation and Objectivesmentioning

confidence: 99%

A new short-term aging model for asphalt binders based on rheological activation energy

et al. 2019

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“…The contact area between the surface concrete slab layer and the wheel during vehicle movement depends on tyre pressure; as tyre pressure decreases, the contact area increases. In general, the contact area has an irregular shape which consists of a middle rectangular part and two semi-circular side parts, as shown in equation (2).…”

Section: Load Propertiesmentioning

confidence: 99%

“…Temperature variation also causes other distress, such as fatigue cracking, thermal cracking and rutting [1]. Traffic loads and environmental conditions (temperature variations) are the main causes of fatigue cracking [2]. Rigid pavements consist of concrete surface slabs with high strength, connected by tie bars or dowel steel bars.…”

Section: Introductionmentioning

confidence: 99%

Behaviour of Different Pavement Types Under Traffic Loads Using Finite Element Modelling

Khodary¹,

Akram²,

Mashaan³

2020

International Journal of Civil Engineering and Technology (Ijciet)

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Finite Element Modelling (FEM) has become an increasingly popular method to help researchers find solutions to complex problems of structural mechanics in engineering. Pavement is a complex structure which consists of multiple layers of different materials that influence its behaviour under stress. Rutting behaviour can be predicted by 3D model analysis using the ABAQUS program. The modelling process assumes that the performance of all materials is one of linear elastic behaviour. The main inputs in the modelling process are the material elastic modulus, Poisson's ratio and layer thickness. Models consist of surface, base, subbase and subgrade layers. Subgrade layers are assumed to have infinite depth in all pavement models. This study employed a simulation process of rigid, semi-rigid and flexible pavements using a standard axle load of 80 kN, which represents a single two-wheeled axle. FEM analysis showed that instantaneous vertical displacement along the Z-axis reached 0.105 mm, 0.32 mm and 0.66 mm for rigid, semi-rigid and flexible pavements respectively. Increasing the subgrade elastic modulus from 10 MPa to 200 MPa decreased the vertical displacement by seven, six and a half, and three and a half times for rigid, semirigid and flexible pavement respectively. KENLAYER results refer to the maximum vertical displacements as being 0.1, 0.28 and 0.60 mm for rigid, semi-rigid and flexible pavement respectively. The subgrade elastic modulus is key to improving the resistance to failure of all pavement types. Incremental increase to the subgrade elastic modulus is a potential engineering solution to reducing vertical displacement.

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“…The mechanics-based analysis and design framework is used for the performance evaluation of field pavement sections when considering their resistance to fatigue crack initiation. It was developed on the basis of hot mix asphalt fracture mechanics and incorporates mixture morphology influence on key damage and fracture properties ( 25 – 27 ). This framework, unlike the AASHTO MEPDG, appropriately takes into account the effects of aging and healing on accumulated damage and captures the influence of strain rate through energy based damage and resistance parameters.…”

Section: Distress Model and Design Input Characterizationmentioning

confidence: 99%

Towards a Reliability-Based Pavement Design using Response Surface Methods

Dinegdae¹,

Onifade²,

Birgisson

et al. 2018

Transportation Research Record: Journal of the Transportation R

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Reliability has been incorporated in many pavement design procedures to account for the effects of inputs variabilities and uncertainties on predicted performance. The American Association of State Highway and Transportation Officials (AASHTO) mechanistic empirical pavement design guide (MEPDG) computes the reliability of pavement sections with the assumption that the variability of predicted distresses follows normal distribution. This approach does not account for the systematic contribution of each design input variability on the overall output variance. This paper evaluates a two-component reliability analysis methodology for pavement application. The two-component reliability analysis methodology uses a response surface method (RSM) for a surrogate model generation and the first order reliability method (FORM) for reliability computation. Three different response surface methods (central composite, Box–Behnken and Doehlert designs) were implemented and statistically verified for their suitability for surrogate model generation. The two-component reliability analysis methodology was further utilized for the generation of partial safety factors for the development of a load and resistance factor design (LRFD) procedure for pavement applications. Field pavement sections with a wide range in design inputs and target reliabilities were used to evaluate the proposed reliability analysis methodology. The results have shown that the three RSM can be used effectively for pavement reliability problems.

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Effects of truck traffic on top-down fatigue cracking performance of flexible pavements using a new mechanics-based analysis framework

Cited by 22 publications

References 14 publications

A new short-term aging model for asphalt binders based on rheological activation energy

A new short-term aging model for asphalt binders based on rheological activation energy

Behaviour of Different Pavement Types Under Traffic Loads Using Finite Element Modelling

Towards a Reliability-Based Pavement Design using Response Surface Methods

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