Evaluation ability ground penetration radar in recognition potential decreasing the durability of the applied asphaltlayer (Case study of Kerman province)

One of the influencing factors in failure asphalt layer perecentage empty space. For that reason validate benchmark for assessing and evaluating the quality of asphalt in road projects. Coring is the usuall method for measuring quality of asphalt layer in the implemented road projects. But the mentioned method is costly and time-consuming and also show the quality of asphalt layer in a specific point . In the present article determin percentage empty space and also detection potential failure of the implemented asphalt layer with using the device GPR ( Ground Penetrating Radar ) reviewed. In the research firstly a part of Tehran network roads selected as a sample for study then evaluated mechanized with the help device GPR done . In the following taken core samples from locations rand omly and then experiments determine percentage empty space and density done on them.In comparison results destructive experiments with mechanized scrolling transpire by increase percentage empty space in the asphalt layer decreases dielectric. So that by decreasing the percentage of empty space less and equal to 9%, an increase in dielectric constant value of 5 due to non-destructive evaluation observed. .so the using output results radar can be obtained continuous profile from status percentage empty spase the project study that this profiles obtained make useful in diagnosis potential groove failure implemented asphalt layer.