backcalculation of asphalt concrete complex modulus curve

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Backcalculation of asphalt concrete complex modulus curve ...

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 time-histories are the most significant factor affecting the backcalculated AC relaxation and complex modulus curves.

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Michigan State University

ABSTRACT BACKCALCULATION OF ASPHALT CONCRETE COMPLEX MODULUS CURVE BY LAYERED VISCOELASTIC SOLUTION By Ligang Lei In-situ evaluation of

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Backcalculation of Asphalt Concrete Modulus Master Curve ...

modulus (complex modulus), a critical feature in backcalculating the E * master curve; the ViscoWave time domain dynamic analysis pro- gram can handle time-dependent HMA modulus (relaxation modulus),

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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

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TR-659, Development of Asphalt Dynamic Modulus Master ...

backcalculation issues that are only related to the modulus master curve of the AC layer. For the proof-of-concept demonstration, a comprehensive full-depth hot-mix asphalt (HMA) analysis was carried out through 10,000 batch simulations using a viscoelastic (VE) forward analysis program.

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Structural assessment of asphalt pavement condition using ...

Jun 30, 2019  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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Backcalculation of Asphalt Concrete Modulus Master Curve ...

Jan 01, 2014  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 of stiff layer and the depth to stiff layer, if present.

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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

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Backcalculation of Asphalt Pavement Properties Michigan ...

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 ...

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

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TR-659, Development of Asphalt Dynamic Modulus Master ...

backcalculation issues that are only related to the modulus master curve of the AC layer. For the proof-of-concept demonstration, a comprehensive full-depth hot-mix asphalt (HMA) analysis was carried out through 10,000 batch simulations using a viscoelastic (VE) forward analysis program.

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Asphalt concrete master curve using dynamic backcalculation

Download Citation Asphalt concrete master curve using dynamic backcalculation The dynamic backcalculation of pavement layer properties, and more specifically the ability to determine the ...

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Backcalculation of Dynamic Modulus Mastercurve from ...

Backcalculation of Dynamic Modulus Mastercurve from Falling Weight Deflectometer Surface Deflections. The need to characterize the structural condition of existing pavements accurately has increased with the recent development, release, and ongoing implementation of the new "Mechanistic–Empirical Pavement Design Guide" (MEPDG).

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Structural assessment of asphalt pavement condition using ...

Jun 30, 2019  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

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 Tech transfer summary of full report under same title.

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Determination of complex modulus gradients of flexible ...

Jul 22, 2020  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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Identification of the viscoelastic properties of an ...

Lei L (2011) Backcalculation of asphalt concrete complex modulus curve by layered viscoelastic solution. Ph.D. thesis, Michigan State University Constructing the stiffness master curves for ...

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Development of asphalt dynamic modulus master curve using ...

Development of asphalt dynamic modulus master curve using falling weight deflectometer measurements. ... 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 ...

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Development of Asphalt Dynamic Modulus Master Curve Using ...

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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Applications of EME2 Asphalt - UK Essays

The dynamic modulus of an asphalt mix is dependent of the temperature and the frequency at which the stress is applied. The dynamic modulus is the absolute value of the complex modulus E* which is expressed in the equation below (Kasthurirangan Gopalakrishnan 2014): E

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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 to

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Backcalculation of Dynamic Modulus from Falling Weight ...

Backcalculation of Dynamic Modulus from Falling Weight Deflectometer Data ... applied various means to investigate efficient ways to characterize the dynamic modulus of existing asphalt concrete (AC) pavements. North Carolina (NC) 96 was selected for this study ... Because the shape of the curve is linked to viscoelasticity and the damaged

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Backcalculated Modulus of Asphalt Concrete

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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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

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Backcalculation of Dynamic Modulus from Resilient Modulus ...

Jan 01, 2008  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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Development of asphalt dynamic modulus master curve using ...

Development of asphalt dynamic modulus master curve using falling weight deflectometer measurements. ... 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 ...

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Development of Asphalt Dynamic Modulus Master Curve Using ...

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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Development of Asphalt Dynamic Modulus Master Curve

master curves based on time-temperature superposition principles to characterize the viscoelastoplastic properties of asphalt concrete (AC) materials. The MEPDG recommends the use of AC dynamic modulus, E*, as the design parameter. The standard laboratory procedure for AC dynamic modulus testing requires time and considerable resources.

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Backcalculation of Dynamic Modulus Mastercurve from ...

Jan 01, 2011  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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Field and laboratory stress-wave measurements of asphalt ...

Nov 15, 2016  1. Introduction. Material stiffness is one of the most important parameters in pavement design. The dynamic modulus is directly linked to structural capacity and it strongly affects the pavement’s lifespan and deterioration. The modulus for asphalt concrete (AC) is highly dependent on both frequency and temperature; the stiffness of AC decreases with increasing temperatures and/or

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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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Applications of EME2 Asphalt - UK Essays

The dynamic modulus of an asphalt mix is dependent of the temperature and the frequency at which the stress is applied. The dynamic modulus is the absolute value of the complex modulus E* which is expressed in the equation below (Kasthurirangan Gopalakrishnan 2014): E

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Ligang Lei, Ph.D, PE - Structural Engineer - Saber Power ...

Dissertation title: Backcalculation of Asphalt Concrete Complex Modulus Curve by Layered Viscoelastic Solution Michigan State University Master Civil Engineering 3.97

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Figure 211 from Enhanced Analysis of Falling Weight ...

Figure 211. Graph. Average error in the backcalculated AC layer master curve for all runs in LM method. - "Enhanced Analysis of Falling Weight Deflectometer Data for ...

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