NF P98-241-1:1993
路面试验 现场材料明显特殊重量的测定 第1部分:在一直接发射点用γ密度仪测量平均值
Test relating to pavements. Determination of the apparent specific gravity of the materials in situ. Part 1 : measurement of the mean value using a gammadensimeter in one point with direct transmission.