Research on the technology of detecting the compaction degree of asphalt pavement based on radar reflection wave method

Abstract In the construction of asphalt pavement, the compaction quality directly determines the pavement’s performance in use. Insufficient compaction is prone to cause early damage, while excessive rolling may lead to problems such as stone fragmentation and asphalt seepage. To break through the bottleneck of the existing detection technology, promote the application of ground penetrating radar in the field of compaction degree detection, and achieve a more scientific assessment of compaction quality, this paper deeply explores the detection technology based on the radar reflection wave amplitude method. This article systematically analyzes the principle, system composition and data processing flow of this detection technology. Combined with actual engineering cases, it analyzes the reliability of ground penetrating radar in detecting the compaction degree of asphalt pavement under different working conditions. The research finds that there is a significant correlation between the dielectric constant of the pavement structural layer and the void ratio. Based on the reflection wave method, the dielectric constant can be accurately determined, and then the void ratio and compactness of the structural layer can be calculated. At the same time, it is clear that this test method is applicable to dry asphalt pavement.