Application of resonant acoustic spectroscopy to asphalt concrete beams for determination of the dynamic modulus

Gudmarsson, Anders; Rydén, Nils; Birgisson, Björn

doi:10.1617/s11527-012-9877-3

Cited by 21 publications

(9 citation statements)

References 8 publications

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“…The application of manual contact methods for resonance measurements has been frequently utilized in the field of civil engineering [20][21][22][23]. The generation of signals by these manual contact methods is achieved mostly by using impact hammers or steel balls.…”

Section: Automated Non-contact Resonance Testingmentioning

confidence: 99%

Effect of cyclic low temperature conditioning on stiffness modulus of asphalt concrete based on non-contact resonance testing method

Bekele

Rydén

Gudmarsson³

et al. 2019

Construction and Building Materials

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The stiffness modulus behaviors of three different asphalt concrete specimens that are subjected to cyclic cooling and heating are monitored. In an attempt to identify the sole effect of temperature cycles and to avoid any other biasing effects such as thermal contamination that can possibly corrupt measurements, resonance frequency measurements of the specimens are taken using an automated non-contact resonance method. The resonance frequency measurements are based on the fundamental axially symmetric mode of vibration. A hysteretic effect is observed on the measured resonance frequencies of the specimens with an application of cyclic cooling and heating. Lower stiffness moduli are obtained during the heating phase of a complete cooling and heating cycle. The stiffness moduli are calculated from measured resonance frequencies of the specimens in order to show their relative reductions due to the hysteretic effect. This finding is particularly important since it enables us to observe and understand the effect of the thermal history of asphalt concrete with regards to the reversibility behavior of its stiffness modulus. The damping of the specimens is also calculated from the measured resonance frequencies at the temperatures within the applied cyclic cooling and heating. Their observed behavior is also discussed with respect to a presence of potential micro damage.

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Section: Automated Non-contact Resonance Testingmentioning

confidence: 99%

Effect of cyclic low temperature conditioning on stiffness modulus of asphalt concrete based on non-contact resonance testing method

Bekele

Rydén

Gudmarsson³

et al. 2019

Construction and Building Materials

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“…3,4 Therefore, this type of measurements would be a good alternative to conventional complex modulus tests (cyclic tension-compression, flexion, or others) traditionally used to determine the linear viscoelastic (LVE) characterization of asphalt mixes (AM). Different dynamic tests such as measurement of the flying time, [5][6][7] resonance testing considering only the fundamental resonance frequency, [8][9][10] or resonant acoustic spectroscopy (RAS) [11][12][13][14] have been applied to AM, but the frequency dependency behavior of AM cannot be evaluated properly with these tests. Recently, measurement of FRFs has been performed on LVE materials 15,16 and more specifically on AM.…”

Section: Introductionmentioning

confidence: 99%

Linear viscoelastic behavior of asphalt mixes from dynamic frequency response functions

Carret

Benedetto

Sauzéat

2020

Num Anal Meth Geomechanics

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Summary In the small strain domain, asphalt mixes (AM) have a linear viscoelastic (LVE) behavior that is strongly dependent on frequency and temperature. The maximum ratio of modulus values can be up to 1000, and traditional elastic analyses are not pertinent. The possibility to characterize AM from frequency response functions (FRFs) was studied. A new optimization process using the finite element method (FEM) has been developed to back‐calculate the LVE properties of AM from FRFs. The numerical optimization process was applied to a reference material with averaged LVE properties determined from tension‐compression tests performed on a wide variety of AM types. The LVE properties were modeled considering the 3‐Dim version of the model 2S2P1D (2 Springs, 2 Parabolic elements, and 1 Dashpot). Reference FRFs for the considered reference material were obtained from FEM simulations. Three different configurations that may be of interest for practical tests were studied at five different temperatures. The proposed numerical optimization method consists in performing separate optimizations at each temperature to obtain the LVE properties for the considered temperature. Then values obtained at each temperature are considered to optimize 2S2P1D and Williams Landel Ferry (WLF) Equation constants to simulate the global LVE behavior of the material. The accuracy of the process was assessed regarding both the calculated FRFs and the complex modulus evaluation. Results indicate that the proposed optimization process converges almost perfectly towards the reference FRFs. The simulated complex modulus values are also in very good agreement with the values of the reference material.

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“…The application of impact resonance and modal testing has been proven successful in determining the complex dynamic modulus of asphalt concrete samples [1][2][3][4][5]. The technique is based on excitation of samples and measurement of their corresponding resonant frequencies of different modes of vibration.…”

Section: Introductionmentioning

confidence: 99%

“…Resonant frequency tests performed on cylindrical samples of asphalt concrete using an impact method were successfully used to obtain a low-strain complex modulus at different frequencies and temperatures [7][8][9]. Beam-shaped asphalt concrete samples were also used to construct master curves using resonance acoustic spectroscopy (RAS) [1]. The impact resonance method has been used in an existing standard method, i.e., ASTM C 215, to determine the dynamic moduli of cylindrical concrete specimens.…”

Section: Introductionmentioning

confidence: 99%

Automated Non-contact Resonance Excitation Method to Assess Low Temperature Dynamic Modulus of Asphalt Concrete

Bekele

Rydén

Gudmarsson³

et al. 2019

J Nondestruct Eval

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This paper studies the applicability of an automated non-destructive testing method to monitor the stiffness of asphalt concrete at low temperatures. A loudspeaker is used as a source of non-contact excitation of the axially symmetric fundamental resonant frequencies of a disc-shaped asphalt concrete specimen positioned inside an environmental chamber. Measured resonant frequencies are used to calculate the dynamic moduli of the specimen at different temperatures. The repeatability of the method as well as the effect of loudspeaker height above the sample are studied. Results show that the main advantage of the non-contact excitation method, compared to manually applied impact hammer excitation, is that repeatable automated measurements can be performed while the specimen is placed inside an environmental temperature chamber. This methodology enables to study the effect of only low temperature conditioning on the dynamic modulus of asphalt concrete without interference from mechanical loading.

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Application of resonant acoustic spectroscopy to asphalt concrete beams for determination of the dynamic modulus

Cited by 21 publications

References 8 publications

Effect of cyclic low temperature conditioning on stiffness modulus of asphalt concrete based on non-contact resonance testing method

Effect of cyclic low temperature conditioning on stiffness modulus of asphalt concrete based on non-contact resonance testing method

Linear viscoelastic behavior of asphalt mixes from dynamic frequency response functions

Automated Non-contact Resonance Excitation Method to Assess Low Temperature Dynamic Modulus of Asphalt Concrete

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