This research investigates the possibilities of using Ground Penetrating Radar (GPR) as crack investigation tool for asphalt pavements. The investigation includes crack detection and crack analysis. The crack investigation comprises crack depth and width measurement. Although GPR is being used as a pavement characterisation tool, its use as a crack detection tool has not been verified and systematically documented. In this regard, some parameters affecting GPR use were selected from literature and were verified. These parameters include GPR system attributes, material properties, crack characteristics and data processing techniques. To investigate the GPR hardware related characteristics, six up to date systems were used in laboratory and in field. The selected systems included 250 MHz to 3 GHz frequency antennas with impulse and continuous electromagnetic wave generation techniques. Artificial as well as natural cracks were investigated by the GPR systems to bring forward the optimum system requirements for crack analysis. To investigate the asphalt and crack filling material characteristics, different asphalt mix specimens were prepared from various laboratories in Germany. A range of different width and depth cracks were designed in the asphalt specimens to be tested for crack analysis. Air, sand, bitumen and water were used as crack filling materials to investigate their influence on GPR outcomes. The effect of temperature on material properties was also investigated. Moreover, the relation between crack and electromagnetic wave propagation path was investigated regarding crack detection survey. The selected software related parameters were based on known techniques used for data processing such as wave processing and image processing. This also included investigations on 2-D and 3-D data processing techniques and f-k filtering and electromagnetic wave velocity analysis. The outcomes of this study were verified in laboratory and on pavements. The pavement survey results were verified by taking core samples. ...


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    Titel :

    Crack detection in asphalt pavements by means of Ground Penetrating Radar (GPR) ; Erkennung von Rissen in Asphaltstraßen mit Hilfe von Bodenradar (GPR)


    Beteiligte:

    Erscheinungsdatum :

    2017-12-08



    Medientyp :

    Hochschulschrift


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Klassifikation :

    DDC:    6 / 62 / 625 / 690




    Crack detection in asphalt pavements by means of Ground Penetrating Radar (GPR)

    Ahmad, Noor / Technische Universität Braunschweig | TIBKAT | 2016



    Crack detection in asphalt pavements by means of Ground Penetrating Radar (GPR)

    Ahmad, Noor / Technische Universität Braunschweig | TIBKAT | 2017

    Freier Zugriff

    Crack detection in asphalt pavements by means of Ground Penetrating Radar (GPR)

    Ahmad, Noor / Technische Universität Braunschweig | GWLB - Gottfried Wilhelm Leibniz Bibliothek | 2016