Construction of triaxial dynamic modulus master curve for asphalt mixtures

Zhao, Yanqing; Tang, Jimin; Liu, Hui

doi:10.1016/j.conbuildmat.2012.06.067

Cited by 41 publications

(12 citation statements)

References 9 publications

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“…According to the time-temperature superposition principle, dynamic modulus and phase angle under different temperatures and frequencies can be translated to an integrated curve, called master curve [27]. Therefore, to obtain a dynamic modulus master curve, the curves under different temperatures are required to be horizontally shifted to one curve at a given temperature [28].…”

Section: Experimental Data Processingmentioning

confidence: 99%

Comparison of Relaxation Modulus Converted from Frequency- and Time-Dependent Viscoelastic Functions through Numerical Methods

Zhang

Cui

et al. 2018

Applied Sciences

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Due to the difficulty of obtaining relaxation modulus directly from experiments, many interconversion methods from other viscoelastic functions to relaxation modulus were developed in previous years. The objectives of this paper were to analyze the difference of relaxation modulus converted from dynamic modulus and creep compliance and explore its potential causes. The selected methods were the numerical interconversions based on Prony series representation. For the dynamic to relaxation conversion, the time spectrum was determined by the collocation method. Meanwhile, for the creep to relaxation conversion, both the collocation method and least squares method were adopted to perform the Laplace transform. The results show that these two methods do not present a significant difference in estimating relaxation modulus. Their difference mostly exists in the transient reduced time region. Calculating the average of two methods is suggested to avoid great deviation of single experiment. To predict viscoelastic responses from creep compliance, the collocation method yields comparable results to the least squares method. Thus, simply-calculated collocation method may be preferable in practice. Further, the master curve pattern is sensitive to the Prony series coefficients. The difference in transient reduced time region may be attributed to the indeterminate Prony series coefficients.

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Section: Experimental Data Processingmentioning

confidence: 99%

Comparison of Relaxation Modulus Converted from Frequency- and Time-Dependent Viscoelastic Functions through Numerical Methods

Zhang

Cui

et al. 2018

Applied Sciences

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“…The novel mechanistic-empirical pavement design guide (MEPDG), developed under the National Cooperative Highway Research Program (NCHRP) Project 1-37A, represents a major step in this direction [ 4 ]. In these mechanistic-empirical (ME) design procedures, characterization of the mechanical properties of paving materials is essential for determining pavement structures’ responses [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Pavement Properties and Predictive Durability Analysis of Asphalt Mixtures

Zhang

Ping

et al. 2022

Polymers

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The actual lifetimes of many highways are lower than that expected based on the initial pavement design, which brings increasingly prohibitive costs of pavement maintenance and repair. Although many works have been done, the real service lifetimes are still disappointing, and the researchers are also trying their best to increase the projects' life span. In this study, to comprehensively predict the durability and lifetime of newly designed asphalt mixture structures, an asphalt pavement project consisting of three hot mix asphalt (HMA) mixtures were evaluated. The mixtures were constructed in the pavement project of the Weiwu expressway in Gansu Province. Pavement properties of the asphalt mixtures, rutting and temperature fatigue factors of the dynamic modulus are discussed. The fatigue resistance is supposed to improve on increasing the vehicles’ speed below the freezing point, which may be more suitable for applications in expressways. Meanwhile, the lifetime is measured according to the number of fatigue axle loads calculated, which were corrected between the specimens in the lab and the field core samples. Durability analysis prediction can be obtained based on the fatigue lifetime predictive model accordingly, which can provide more information about the fatigue lifetime and the rehabilitation planning of existing pavements in the future accordingly.

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“…As mentioned above, on one hand, the shear failure of asphalt pavement materials usually occurs under the effect of overload and heavy load during the hot summer season [20]. On the other hand, the triaxial test has many advantages such as to simulate the complex stress state of the pavement structure, and to solve the friction angle and cohesion strength for asphalt pavement materials and structure design [21][22][23]. However, the use of the linear Mohr-Coulomb theory affects the accuracy of materials and structure design for asphalt pavement.…”

Section: Introductionmentioning

confidence: 99%

Shear Properties of Asphalt Mixtures under Triaxial Compression

Huang

Liu

et al. 2019

Applied Sciences

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In order to study the influences of confining pressure and temperature on the shear properties of asphalt mixtures, triaxial tests were conducted at 40 °C, 50 °C, and 60 °C, with the confining pressure ranges from 0 to 1 MPa for the widely used continuous-graded AC (Asphalt Concrete)-13, open-graded OGFC (Open-Graded Friction Course)-13, and gap-graded SMA (Stone Mastic Asphalt)-13 asphalt mixtures in China. A nonlinear regression/prediction model of triaxial strength for asphalt mixtures was proposed. The results show that confining pressure and temperature had a significant effect on the shear resistance of asphalt mixtures. With increasing temperature, the shear strength of the asphalt mixture gradually decreased due to the decreasing of cohesion strength; the shear strength of the asphalt mixture increased with the increase of confining pressure. Meanwhile, the cohesion strength increased and the friction angle decreased gradually with the increase of confining pressure. When the confining pressure was close to 0.6 MPa, the Mohr–Coulomb failure envelope bended down, so the linear Mohr–Coulomb criterion is not suitable to describe the failure behavior of asphalt mixtures. Therefore, a power function failure envelope was put forward to characterize the nonlinear shear properties of asphalt mixtures. The nonlinear evolutional laws of shear parameters, which includes cohesion strength and friction angle, were also proposed for asphalt pavement material and structure design. Among these asphalt mixtures, the gap-graded SMA-13 asphalt mixture exhibited better performance on the resistance to shear failure, and it was recommended as the upper layer material to improve the shear performance of asphalt pavement.

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Construction of triaxial dynamic modulus master curve for asphalt mixtures

Cited by 41 publications

References 9 publications

Comparison of Relaxation Modulus Converted from Frequency- and Time-Dependent Viscoelastic Functions through Numerical Methods

Comparison of Relaxation Modulus Converted from Frequency- and Time-Dependent Viscoelastic Functions through Numerical Methods

Pavement Properties and Predictive Durability Analysis of Asphalt Mixtures

Shear Properties of Asphalt Mixtures under Triaxial Compression

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