Comparison of the Pavement Layers Thickness Measured by Georadar and Conventional Methods – Examples From Croatia

Marko Ožbolt, Tatjana Rukavina, Josipa Domitrović


Thickness of the pavement structure layers represents an important data for the implementation into the database of roads already constructed, during the pavement strengthening design, particularly if the appraisal of the bearing capacity of the pavement structure is done by means of the Falling Weight Deflectometer, during reconstruction of pavements or during control of the newly constructed roads. If reconstruction is carried out by procedures of recycling of the existing pavement the details about the thickness of asphalt layers are important not only when determining the depth of the intervention but also when designing asphalt mixture. During quality control of the newly constructed road sections the Ground Penetrating Radar (GPR, georadar) can be used as the instrument for fast and efficient determination of the thickness of layers. Measuring is done at speeds that approx correspond to the speeds of traffic flow, so that disturbance of traffic is minimum, whereby the safety of participants in traffic and measuring personnel is increased. The paper presents several examples of determining the thickness of layers of road pavement structures by the non-destructive GPR method. The obtained results were compared to conventional methods of determining thicknesses that are used in Croatia, i.e. coring or data obtained by surveying methods during construction of the pavement structural layers. Measurements were done on completely new and existing roads of different age having the asphalt pavement.


pavement; thickness; strengthening; georadar; GPR; ground penetrating radar

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Al-Qadi, I. L.; Lahouar, S. 2005. Measuring Layer Thicknesses with GPR – Theory to Practice, Construction and Building Materials 19(10): 763–772.

Angi, C.; Manacorda, G.; Pinelli, G.; Benedetto, A. 2003. GPR Automatic Inspection of Road Pavement Layer Thickness [CD-ROM], in Proc. of the Conference “Maintenance and Rehabilitation of Pavements and Technological Control”. July 7–10, 2003. University of Minho, Guimaraes, Portugal.

Cao, Y.; Labuz, J.; Guzina, B. 2011. Evaluation of Pavement System Based on Ground-Penetrating Radar Full-Waveform Simulation. Transportation Research Board 90th Annual Meeting. January 23–27, 2011. Washington, D.C., USA.

Chen, D.; Xie, J.; Scullion, T. 2011. Using GPR and FWD to Assist in Selecting the Optimal Pavement Rehabilitation Strategy [CD-ROM], in Proc. of the GeoHunan International Conference “Pavements and Materials: Recent Advances in Design, Testing, and Construction (GPS 212)”. June 9–11, 2011. Hunan, China.

Čygas, D.; Laurinavičius, A.; Vaitkus, A.; Perveneckas, Z.; Motiejūnas, A. 2008. Research of Asphalt Pavement Structures on Lithuanian Roads (I), The Baltic Journal of Road and Bridge Engineering 3(2): 77–83.–83

Fontul, S. 2004. Structural Evaluation of Flexible Pavements Using Non-Destructive Tests. PhD thesis. LNEC, Lisabon, Portugal.

Harris, D. A. 2006. Pavement Thickness Evaluation Using Ground Penetrating Radar. PhD thesis. Purdue University, West Lafayette, Indiana, USA.

Leng, Z. 2011. Prediction of In-Situ Asphalt Mixture Density Using Ground Penetrating Radar: Theoretical Development and Field Verification. PhD thesis. University of Illinois at Urbana-Champaign, Urbana, Illinois, USA.

Loizos, A.; Plati, C. 2007. Accuracy of Pavement Thicknesses Estimation Using Different Ground Penetrating Radar Analysis Approaches, NDT&E International 40(2): 141–157.

Maser, R. K. 1994. Ground Penetrating Radar Surveys to Characterize Pavement Layer Thickness Variations at GPS Sites. Strategic Highway Research Program, Report No. SHRP-P-397. Washington DC, USA.

Ožbolt, M.; Rukavina, T.; Stančerić, I. 2009. Mogućnost Uređaja GPR pri Snimanju Kolničkih Konstrukcija, Građevinar 61(3): 251–259.

Saarenketo, T. 2006. Electrical Properties of Road Materials and Subgrade Soils and the Use of Ground Penetrating Radar in Traffic Infrastructure Surveys. PhD thesis. University of Oulu, Finland.

Yi, J. H.; Kim, Y. S.; Mun, S. Ho.; Kim, J. M. 2010. Evaluation of Structural Integrity of Asphalt Pavement System from FWD Test Data Considering Modeling Errors, The Baltic Journal of Road and Bridge Engineering 5(1): 10–18.

DOI: 10.3846/bjrbe.2012.04


1. Spatial Representation of GPR Data—Accuracy of Asphalt Layers Thickness Mapping
Šime Bezina, Ivica Stančerić, Josipa Domitrović, Tatjana Rukavina
Remote Sensing  vol: 13  issue: 5  first page: 864  year: 2021  
doi: 10.3390/rs13050864


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