In recent years, the non-destructive testing wre widely used on the road, and in the meanwhile, the detection of PQI at asphalt pavement were applied in quantity. This paper focuses on the credibility of the test results when the PQI detect diffient size of asphalt mixtures. For the low credibility of the coarse asphalt mixes, the author devised a new test method that can graetly improve the credibility of the results.%近年来无损检测在道路上的应用越来越广泛,而PQI对沥青路面的检测也应用得越来越多.讨论了PQI对各种不同粒径沥青混合料进行检测时,其检测结果的可信度.同时对于可信度不高的粗粒式沥青混合料,对其检测方法进行了改进,改进后检测结果可信度大大提高.
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