Comparison of the 3-dim linear viscoelastic behavior of asphalt mixes determined with tension-compression and dynamic tests

Carret, Jean‐Claude; Pedraza, A.; Benedetto, Hervé Di; Sauzéat, Cédric

doi:10.1016/j.conbuildmat.2018.04.156

Cited by 25 publications

(14 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The impact hammer was automated to improve the repeatability of the test and to allow measurements directly inside the thermal chamber. The order of magnitude of the maximum strain induced in the specimen by the impact is about 0.1 μm/m [8][9][10]. The response of the material was recorded with an accelerometer (PCB model 353B15) glued in the middle of the opposite short side of the specimen (see Fig.…”

Section: Experimental Measurement Of the Frequency Response Functionsmentioning

confidence: 99%

“…Recently, measurement of frequency response functions (FRFs) have been performed on AM [6][7][8][9][10][11]. Gudmarsson et al [7,8] and Carret et al [9,10] showed that using FRFs measurements to obtain the LVE properties of AM is a very promising approach. In this paper, the possibility of using a simple approach using finite element calculations to obtain the complex modulus of the material at each temperature from FRFs measurements is studied.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic testing of asphalt mixes

2019

Self Cite

View full text Add to dashboard Cite

In the presented research, conventional cyclic tension–compression complex modulus tests and dynamic tests were performed on an asphalt mix (AM) specimen. For the tension–compression tests, the complex modulus was calculated from the measurements of the axial strain and axial stress. For the dynamic tests, an automated impact hammer equipped with a load cell and an accelerometer were used to determine the frequency response functions (FRFs) at five different temperatures. A back-analysis using finite element method (FEM) calculations and a very simple modelling of the material behaviour was proposed to determine the complex modulus of the specimen at each tested temperature. Complex modulus results from dynamic and cyclic tests were compared and are in good agreement. The norm of the complex modulus obtained from dynamic test is slightly higher and no significant difference is seen for the phase angle. Part of the differences observed may be explained by the nonlinearity of AM (strain amplitude is about 500 times smaller for dynamic tests).

show abstract

Section: Experimental Measurement Of the Frequency Response Functionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic testing of asphalt mixes

2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…An impact hammer equipped with a load cell (PCB model 086E80) was used as an external source of excitation. The order of magnitude of the maximum strain induced in the specimen by the impact is of about 0.1 µm/m [18,21]. The impact hammer was automated with a solenoid piston programmed with a microcontroller (Arduino Uno R3) to improve the repeatability of the test and to allow measurements directly inside a thermal chamber.…”

Section: Measurement Of the Frequency Response Functions (Frfs)mentioning

confidence: 99%

“…Resonance testing considering only the fundamental resonance frequency [9][10][11] or resonant acoustic spectroscopy (RAS) [12][13][14][15] have also been applied to AM but it is not possible to describe accurately the frequency dependency behaviour of AM with these different tests. Recently, measurement of frequency response functions (FRFs) have been performed on LVE materials [16,17] and more specifically on AM [18][19][20][21]. Gudmarsson et al [19,20] and Carret et al [21] showed that using FRFs measurements to derive the LVE properties of AM is a very promising approach.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, measurement of frequency response functions (FRFs) have been performed on LVE materials [16,17] and more specifically on AM [18][19][20][21]. Gudmarsson et al [19,20] and Carret et al [21] showed that using FRFs measurements to derive the LVE properties of AM is a very promising approach. However, characterizing accurately the LVE behaviour of AM from FRFs is not possible through a simplified analysis [22] and it requires an elaborate approach.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Characterization of Asphalt Mixes Behaviour from Dynamic Tests and Comparison with Conventional Cyclic Tension–Compression Tests

2018

Self Cite

View full text Add to dashboard Cite

In the presented research, conventional cyclic tension–compression tests and dynamic tests were performed on two types of asphalt mixes (AM). For the tension–compression tests, the complex modulus was obtained from the measurements of the axial stress and axial strain. For the dynamic tests, an automated impact hammer equipped with a load cell and an accelerometer were used to obtain the frequency response functions (FRFs) of the specimens at different temperatures. Two methods were proposed to back-calculate the complex modulus from the FRFs at each temperature: one using the 2S2P1D (two springs, two parabolic elements and one dashpot) model and the other considering a constant complex modulus. Then, a 2S2P1D linear viscoelastic model was calibrated to simulate the global linear viscoelastic behaviour back calculated from each of the proposed methods of analysis for the dynamic tests, and obtained from the tension–compression test results. The two methods of analysis of dynamic tests gave similar results. Calibrations from the tension–compression and dynamic tests also show an overall good agreement. However, the dynamic tests back analysis gave a slightly higher value of the norm of the complex modulus and a lower value of the phase angle compared to the tension–compression test data. This result may be explained by the nonlinearity of AM (strain amplitude is at least 100 times smaller for dynamic tests) and/or by ageing of the materials during the period between the tension–compression and the dynamic tests.

show abstract

Linear viscoelastic behavior of asphalt mixes from dynamic frequency response functions

Carret

Benedetto

Sauzéat

2020

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

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.

show abstract

Comparison of the 3-dim linear viscoelastic behavior of asphalt mixes determined with tension-compression and dynamic tests

Cited by 25 publications

References 27 publications

Dynamic testing of asphalt mixes

Dynamic testing of asphalt mixes

Characterization of Asphalt Mixes Behaviour from Dynamic Tests and Comparison with Conventional Cyclic Tension–Compression Tests

Linear viscoelastic behavior of asphalt mixes from dynamic frequency response functions

Contact Info

Product

Resources

About