AASHTO T 343-12（2020）规定了通过测量压实过程中产生的电磁场变化，就地测定HMA路面的总密度和相对压实度。本方法中引用的设备是一种表面接触装置，相对不受HMA摊铺作业中通常遇到的表面水分和表面温度变化的影响。如果需要，应包括测量/补偿材料压实过程中水分和温度变化的电路。

AASHTO T 343-12 (2020) covers the in-place determination of the total density and relative compaction of HMA pavements by measuring changes in the electromagnetic field resulting from the compaction process.The equipment referenced in this method is a surface contact device that is relatively unaffected by the surface moisture and surface variances in temperature typically encountered during HMA paving operations. If needed, it should include circuitry to measure/compensate for moisture and temperature variances during the material compaction process.