Determination of the compaction of hot mix asphalt using high-frequency electromagnetic methods

Fauchard, Cyrille; Ли, Бо; Laguerre, Laurent; Heritier, B; Benjelloun, Nabil; Kadi, Moncef

doi:10.1016/j.ndteint.2013.07.004

Cited by 25 publications

(15 citation statements)

References 28 publications

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“…If

α = 0.5

, equation () is the so‐called Complex Refractive Index (CRI) model (Sihvola ). This model has been studied in (Fauchard et al ) to estimate the compaction of various HMA slabs whose nature of aggregates was known and the aggregates’ permittivity values were perfectly characterized in cylindrical cavities. The alpha parameter was adjusted in order to best‐fit the compaction estimated by the SFR method in comparison with the compaction provided by the standard nuclear tests.…”

Section: Basic Theoretical Background For Compaction Assessment With mentioning

confidence: 99%

“…For this purpose, the dielectric characterization of rocks used in road construction has been undertaken first, in the last years, in the Normandy region, and second, will be considered in the whole country in further studies. First results on dielectric characterization of rocks are presented in (Fauchard et al ). The main idea of this approach is to provide an on‐site tool for the compaction evaluation that required just the usual data provided by the road builders and a new data, the measured permittivity of the rock aggregates.…”

Section: Basic Theoretical Background For Compaction Assessment With mentioning

confidence: 99%

See 1 more Smart Citation

Non‐destructive assessment of hot mix asphalt compaction/density with a step‐frequency radar: case study on a newly paved road

Fauchard

Beaucamp

Laguerre

2014

Near Surface Geophysics

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A Step Frequency Radar (SFR) is used for assessing the compaction of Hot Mix Asphalt (HMA) layers. The system is composed of a network analyser and an Ultra Wide Band (UWB) antenna placed above the road surface. The measurements are carried out on a new-paved road in Cagny (Normandie, France). The SFR system provides the permittivity of the first overlay. The data is corrected from vehicle vibrations and calibrated at fixed locations. Then, the HMA compaction is deduced with a Lichteneker-Rother (LR) model. The results are compared with standard tests (gamma bench testing on cores and in-place nuclear gauge). We show that the SFR system allows the nondestructive assessment of HMA overlay with a high density of points, and with an accuracy close to the compaction provided by standard tests

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“…If

α = 0.5

Section: Basic Theoretical Background For Compaction Assessment With mentioning

confidence: 99%

Section: Basic Theoretical Background For Compaction Assessment With mentioning

confidence: 99%

Non‐destructive assessment of hot mix asphalt compaction/density with a step‐frequency radar: case study on a newly paved road

Fauchard

Beaucamp

Laguerre

2014

Near Surface Geophysics

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“…The attenuation constant of oil sand was estimated based on the perturbation theory. We have calculated microwave power dissipation in sand and bitumen for various electrical properties of bitumen . Table illustrates the microwave power dissipation into oil sands at 2.45 GHz.…”

Section: Resultsmentioning

confidence: 99%

Thermal kinetics analysis in microwave‐assisted oil sands separation

2016

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This computational study addresses oil sands separation under microwave irradiation. Electric field distribution and microwave energy dissipation were analyzed at the level of sand particles and bitumen. The simplified model does not include water or gas present in the oil sands. The microwave power dissipated in bitumen was found to be about 32 times that of the sand particles. In order to investigate the feasibility of heating the bitumen phase preferentially and sustaining a thermal gradient between the bitumen phase and the solid phase, thereby reducing the thermal losses to the solid phase, time scales were estimated using several different scenarios. The small size of the particles in the solid phase caused the time needed to reach thermal equilibrium between phases to be extremely short, in the order of 10 to 100 ms. To achieve separation times shorter than these, pressures up to 100 GPa would have to be sustained across the oil sands layer. Alternatively, buoyancy‐driven separation by settling would require accelerations in the order of 100 000 m/s2 (105 g). Therefore, the heating and separation of bitumen within the thermal conduction time scales seem to be theoretically possible but associated with high technological challenges in their implementation.

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“…() for three‐phase mixture and by Fauchard et al . (, ) for four‐phase mixture. Here, we provide a brief reminder of these basic principles.…”

Section: Theoretical Approach and Application Of Modelsmentioning

confidence: 99%

Rock permittivity characterization and application of electromagnetic mixing models for density/compactness assessment of HMA by means of step‐frequency radar

Araujo

Delbreilh

Laguerre³

et al. 2016

Near Surface Geophysics

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This work aims to determine the compactness/density of hot mix asphalt by measuring its permittivity by means of step-frequency radar. As hot mix asphalt (HMA) is mainly made of rocks; their dielectric properties are measured in the frequency range of 0.5 -4 Ghz with step-frequency radar, using cylindrical cavities. The results show that the rocks can be considered as low-loss dielectric. As electromagnetic mixing models are required to translate measured permittivity to the compactness, power law models and unified mixing rules are needed for laboratory experimental data. The slab permittivity of various compactness is determined with the help of the step-frequency radar system. This study shows that: (i) the selection of the electromagnetic mixing model has a critical impact on the accuracy of the calculated compactness; (ii) the choice of the host matrix for a family of unified mixing rules has huge consequences; and (iii) the best assessment of compactness/density is given by the complex refractive index model and Rayleigh and Böttcher models with an aggregate matrix.

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Determination of the compaction of hot mix asphalt using high-frequency electromagnetic methods

Cited by 25 publications

References 28 publications

Non‐destructive assessment of hot mix asphalt compaction/density with a step‐frequency radar: case study on a newly paved road

Non‐destructive assessment of hot mix asphalt compaction/density with a step‐frequency radar: case study on a newly paved road

Thermal kinetics analysis in microwave‐assisted oil sands separation

Rock permittivity characterization and application of electromagnetic mixing models for density/compactness assessment of HMA by means of step‐frequency radar

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