Pavement Design and Materials

Papagiannakis, A. T.; Masad, Eyad

doi:10.1002/9780470259924

Cited by 96 publications

(96 citation statements)

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“…Mechanical properties of an asphalt concrete are highly dependent on temperature and time of loading [1][2][3]. Therefore, the determination of the mechanical behavior of an asphalt concrete, taking into account the variation of the above-mentioned factors, has important practical value.…”

Section: Introductionmentioning

confidence: 99%

Steady-State Creep of Asphalt Concrete

Iskakbayev

Teltayev²,

Rossi

2017

Applied Sciences

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This paper reports the experimental investigation of the steady-state creep process for fine-grained asphalt concrete at a temperature of 20 ± 2 • C and under stress from 0.055 to 0.311 MPa under direct tension and was found to occur at a constant rate. The experimental results also determined the start, the end point, and the duration of the steady-state creep process. The dependence of these factors, in addition to the steady-state creep rate and viscosity of the asphalt concrete on stress is satisfactorily described by a power function. Furthermore, it showed that stress has a great impact on the specific characteristics of asphalt concrete: stress variation by one order causes their variation by 3-4.5 orders. The described relations are formulated for the steady-state of asphalt concrete in a complex stressed condition. The dependence is determined between stress intensity and strain rate intensity.

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Section: Introductionmentioning

confidence: 99%

Steady-State Creep of Asphalt Concrete

Iskakbayev

Teltayev²,

Rossi

2017

Applied Sciences

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“…The execution of probing is mandatory when there is no information available about the structure, construction history and degradation over the years (Brown, 1997;Bernucci et al, 2006;Papagiannakis and Massad, 2008). These probings require equipment and specialized personnel, making the procedures expensive, and interfering with the level of traffic and road serviceability.…”

Section: Identification Of Pavement Layers Using a Thermal Probementioning

confidence: 99%

Identification of pavement layers using a thermal probe

Parolin

Borges

Specht

2015

Rem: Rev. Esc. Minas

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To obtain information about pavement structure, nowadays, destructive prospecting is carried out, interfering significantly with traffic. Proposed here in is a less destructive and invasive technique, whereby a thermal probe with temperature sensors is installed in the pavement. This process identifies the sources of heat to obtain the temperature distribution as a function of time and space at different depths; to solve the heat transfer problem in two dimensions and to estimate the thickness and thermal materials properties of each layer through the Inverse Problem. The Direct Problem has been modeled by a heat conduction equation and solved by Central Finite Differences, using the explicit method of time advancements. The Genetic and Memetic Algorithms have been efficient in estimating the thickness of the layers and they have presented little difference between the estimated values at each application. The proposed technique has been efficient in estimating the thickness in the tests with experimental pavements and it brings a new perspective for structural evaluation, with reduced pavement intervention and traffic interference. Keywords

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“…However, this parameter is considered as main input in the Mechanistic Empirical Pavement Design approach, which is used to determine three different values, which are the horizontal strain (fatigue) at the bottom of the surface layer, vertical strain (rutting) on the top of the subgrade and the appropriate thickness of the pavement. These measurements are considered on the inputs such as loads, temperature, and resilient modulus of the material [26]. This test was conducted in accordance with ASTM D7369 [27], using servo hydraulic testing machine (UTM-5P).…”

Section: Resilient Modulusmentioning

confidence: 99%

Mechanistic Approach for Reducing the Thickness of Asphalt Layer Incorporating Steel Slag Aggregate

Alnadish

Aman

2018

CivileJournal

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This study aimed to evaluate the possibility of reducing the thickness of asphalt layer as a novel solution for the high density of asphalt layer incorporated with steel slag aggregate, which increase the cost of transportation. MechanisticEmpirical Pavement Design (MEPDG) approach was employed to evaluate the benefits of introducing polyvinyl alcohol fiber in terms of reducing the thickness of asphalt layer as well as the extension service life of asphalt layer. On the other hand, the correlation between creep strain slope (CSS) and secant creep stiffness modulus (SCSM) were assessed to provide a better evaluation and understanding concerning of the outputs of the dynamic creep test. The findings of this study showed that introducing polyvinyl alcohol fiber into the mixtures at the optimum content (0.5 kg/ton) have reduced the thickness of asphalt layer by approximately 10%. Additionally, polyvinyl alcohol fiber has increased the performance of the asphalt mixtures concerning of resilient modulus and dynamic creep. Furthermore, the correlation between CSS and SCSM was strong, which indicates that evaluation of permanent deformation using CSS and SCSM parameters provides better actual assessment than accumulation strain.

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Pavement Design and Materials

Cited by 96 publications

References 0 publications

Steady-State Creep of Asphalt Concrete

Steady-State Creep of Asphalt Concrete

Identification of pavement layers using a thermal probe

Mechanistic Approach for Reducing the Thickness of Asphalt Layer Incorporating Steel Slag Aggregate

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