GPR Indicators of Identifying the Boundaries of Asphalt Concrete and Cement Concrete Layers

摘要

In order to realize the reinforcement of the existing road pavement it is essential to know its internal structure. One of the important tasks is the localization of concrete slabs under asphalt concrete pavement. The GPR method is used successfully in solving these problems [1,2]. The paper reviews the results of GPR surveying for determining old cement concrete slabs location under asphalt concrete pavement on section of the Highway M-2 "Crimea" in the Moscow Region of the Russian Federation. For survey the GPR technical equipment was used ("Logis" Ltd, Ramenskoe), that is the antenna assembly with the central frequency radiation of 1700 MHz and the maximum sounding depth up to 0,8 m. The works were held in October 2012 on wet road surface under damp weather conditions.