Backcalculation of asphalt concrete complex modulus curve

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Backcalculation of asphalt concrete complex modulus curve ...

2021-8-12  Backcalculation of asphalt concrete complex modulus curve by layered viscoelastic solution. View PDF. Downloads . Description ... The AC layer relaxation and complex modulus curves match the actual functions within the ranges of 0.0001 to 0.1 sec, and 10 to 10,000 Hz, respectively. The sensitivity analysis shows that errors in the deflection ...

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Michigan State University

2016-9-14  ABSTRACT BACKCALCULATION OF ASPHALT CONCRETE COMPLEX MODULUS CURVE BY LAYERED VISCOELASTIC SOLUTION By Ligang Lei In-situ evaluation of material properties is very important for e

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Backcalculation of Asphalt Concrete Modulus Master

Backcalculation of Asphalt Concrete Modulus Master Curve from Field-Measured Falling Weight Deflectometer Data using a new Time domain Viscoelastic dynamic Solution and

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Backcalculation of Asphalt Concrete Modulus Master Curve ...

2014-1-1  The new algorithm was capable of backcalculating reliably the master curve of the asphalt concrete layer (four sigmoidal coefficients and two time-temperature shift factors), the elastic moduli for the unbound base or subbase and subgrade materials, and the modulus

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Backcalculation of Asphalt Concrete Modulus Master Curve ...

Backcalculation of Asphalt Concrete Modulus Master Curve from Field-Measured Falling Weight Deflectometer Data: Using a New Time Domain Viscoelastic Dynamic Solution and Genetic Algorithm. A new backcalculation program, DYNABACK-VE, was used

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(PDF) Backcalculation of Asphalt Concrete Modulus Master ...

Backcalculation of Asphalt Concrete Modulus Master Curve from Field-Measured Falling Weight Deflectometer Data: Using a New Time Domain Viscoelastic Dynamic Solution and Genetic Algorithm

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(PDF) Backcalculated Modulus of Asphalt Concrete

Asphalt Concrete (AC) is considered a spatially homogeneous material when analyzing and designing asphalt pavement. However, the modulus of AC along the wheel path and the middle of the wheel path ...

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Development of Asphalt Dynamic Modulus Master Curve

2020-10-13  Asphalt concrete, Dynamic modulus of elasticity, Falling weight deflectometers, Hot mix asphalt, neural networks, Viscoelasticity, FWD, HMA, mater curve, relaxation modulus Disciplines Civil Engineering Comments See also the related 3-page Tech Transfer Summary under the same title.

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Identification of the viscoelastic properties of an ...

2020-10-16  Lei L (2011) Backcalculation of asphalt concrete complex modulus curve by layered viscoelastic solution. Ph.D. thesis, Michigan State University. 27. Gudmarsson A, Ryden N, Di Benedetto H, Sauzeat C (2015) Complex modulus and complex Poisson’s ratio from cyclic and dynamic modal testing of asphalt concrete. Constr Build Mater 88:20–31

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Determination of complex modulus gradients of flexible ...

2020-7-22  The modulus gradient of asphalt concrete (AC) layers is an important feature of flexible pavements. The variation of the modulus with depth results from the synthetical effect of material properties, the service time of pavements, loading and environmental conditions. Since the modulus gradient directly affects critical responses and performance of pavements, the determination of the modulus ...

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Backcalculated Modulus of Asphalt Concrete

2019-10-30  spatial variation of asphalt modulus, decrease in asphalt modulus, correlation laboratory dynamic modulus with backcalculation modulus, etc., were out of scope of the study. Appea found a distinct difference between the laboratory modulus and backcalculated modulus. Shalaby et al. [7] found that laboratory modulus values were

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Backcalculation of Dynamic Modulus from Resilient Modulus ...

2008-1-1  Backcalculation of Dynamic Modulus from Resilient Modulus of Asphalt Concrete with an Artificial Neural Network Lacroix Andrew, Y. Richard Kim, and S. Ranji Ranjithan Transportation Research Record 2008 2057 : 1 , 107-113

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Structural assessment of asphalt pavement condition using ...

2019-6-30  Backcalculation of asphalt concrete modulus master curve form field-measured falling weight reflectometer data: using a new time domain viscoelastic dynamic solution and genetic algorithm Trans. Res. Rec. , 2457 ( 2014 ) , pp. 80 - 92

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Development of Asphalt Dynamic Modulus Master Curve

2020-10-13  Asphalt concrete, Dynamic modulus of elasticity, Falling weight deflectometers, Hot mix asphalt, neural networks, Viscoelasticity, FWD, HMA, mater curve, relaxation modulus Disciplines Civil Engineering Comments See also the related 3-page Tech Transfer Summary under the same title.

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Development of Asphalt Dynamic Modulus Master Curve

The asphalt concrete (AC) dynamic modulus (E*) is a key design parameter in mechanistic-based pavement design methodologies such as the American Association of State Highway and Transportation Officials (AASHTO) MEPDG/Pavement-ME Design. The objective of this feasibility study was to develop frameworks for predicting the AC E* master curve from falling weight deflectometer (FWD) deflection ...

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Determination of complex modulus gradients of flexible ...

2020-7-22  The modulus gradient of asphalt concrete (AC) layers is an important feature of flexible pavements. The variation of the modulus with depth results from the synthetical effect of material properties, the service time of pavements, loading and environmental conditions. Since the modulus gradient directly affects critical responses and performance of pavements, the determination of the modulus ...

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Data Requirements from Falling Weight Deflectometer Tests ...

Dynamic modulus (E*) master curve is a fundamental material property for an asphalt pavement. It is also a key input to DARWin-METM, a pavement design and analysis software that can predict progression of distresses.

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[PDF] Development of Asphalt Dynamic Modulus Master Curve ...

The asphalt concrete (AC) dynamic modulus (E*) is a key design parameter in mechanistic-based pavement design methodologies such as the American Association of State Highway and Transportation Officials (AASHTO) Mechanistic Empirical Pavement Design Guide (MEPDG)/Pavement-ME Design. The objective of this feasibility study was to develop frameworks for predicting the AC E* master curve

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Characterizing the Complex Modulus of Asphalt Concrete ...

Asphalt mixtures are the most common types of pavement material used in the world. Characterizing the mechanical behavior of these complex materials is essential in durable, cost-effective, and sustainable pavement design. One of the important properties of asphalt mixtures is the complex modulus of elasticity. This parameter can be determined using different standardized methods, which are ...

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E* - DYNAMIC MODULUS

2003-4-1  Master Curve Development – In the proposed “2002 Guide for the Design of Pavement Systems”, currently under development in NCHRP Project 1-37A, the modulus of the asphalt concrete -at all analysis levels of temperature and time rate of load- is determined from a master curve constructed at a reference temperature, generally 70F.

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Backcalculated Modulus of Asphalt Concrete

2019-10-30  spatial variation of asphalt modulus, decrease in asphalt modulus, correlation laboratory dynamic modulus with backcalculation modulus, etc., were out of scope of the study. Appea found a distinct difference between the laboratory modulus and backcalculated modulus. Shalaby et al. [7] found that laboratory modulus values were

Get price

Backcalculation of Asphalt Pavement Properties Michigan ...

2019-9-26  Backcalculation of in-situ Moduli of Asphalt Pavement Layers using Nondestructive Testing ... and cannot be used to backcalculate fundamental pavement material properties such as the dynamic modulus (E*) master curve and nonlinear properties of unbound layers. ... mastercurve of the asphalt concrete and the nonlinear properties of the unbound ...

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Backcalculation of Dynamic Modulus Mastercurve from ...

2011-1-1  The method uses a layered viscoelastic forward algorithm in an iterative backcalculation procedure for linear viscoelastic characteristics of asphalt pavements. With deflection time histories from a typical FWD test, it was possible to backcalculate the relaxation modulus curve, E(t), up to about t ∼ 10 −1 s and the complex modulus curve ...

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Effectiveness of static and dynamic backcalculation ...

Asphalt concrete (AC) was treated as a viscoelastic material and the complex modulus was obtained using the dynamic approach. The dynamic modulus at a fixed frequency was computed for comparison purposes. ... The results show that the layer property from the dynamic backcalculation approach for different stations were more consistent and showed ...

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Development of Asphalt Dynamic Modulus Master Curve

2014-10-14  to predict asphalt concrete relaxation or dynamic modulus master curve coefficients from falling weight deflectometer deflection-time history data. tech transfer summary June 2014 RESEARCH PROJECT TITLE Development of Asphalt Dynamic Modulus Master Curve Using Falling Weight Deflectometer Measurements SPONSOR Iowa Department of Transportation

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"Development of Asphalt Dynamic Modulus Master Curve

The asphalt concrete (AC) dynamic modulus (E*) is a key design parameter in mechanistic-based pavement design methodologies such as the American Association of State Highway and Transportation Officials (AASHTO) MEPDG/Pavement-ME Design. The objective of this feasibility study was to develop frameworks for predicting the AC E* master curve from falling weight deflectometer (FWD) deflection ...

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COMPLEX MODULUS PREDICTION OF ASPHALT

2021-5-13  Complex modulus is one of the key parameters in the Mechanistic-Empirical Pavement Design Guide (MEPDG). The purpose of this study is to implement an accurate and high-efficiency mechanical method to measure and calculate the complex modulus gradient of asphalt concrete cores in different field locations. Because field

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刚性基层沥青路面参数动态反演 - chd.cn

2017-11-5  The dynamic modulus master curve and phase angle master curve of asphalt layers as well as the elastic moduli of other layers can be backcalculated from the dynamic method. The dynamic modulus master curve and phase angle master curve compose the complete viscoelastic parameters, which can completely represent the relationship between the viscoelastic property of the asphalt concrete

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Modulus of Asphalt Mixtures­ An Unresolved Dilemma

the complex modulus of asphaltic materials. If this is true, and not an artifact of the test procedure, these data should be incorporated into elastodynamic analyses of pavements. Figure 3 shows the apparatus used to determine the complex and dynamic moduli of asphalt concrete; it is essentially an elec­

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Field and laboratory stress-wave measurements of asphalt ...

2016-11-15  Complex modulus and complex Poisson’s ratio from cyclic and dynamic modal testing of asphalt concrete Constr. Build. Mater. , 88 ( 2015 ) , pp. 20 - 31 , 10.1007/s10921-014-0253-9

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