本标准规定了用于根据AS 1289.5.8.4校准核表面水分密度计的a类或C类标准密度块的密度测定方法。a类或C型标准密度块定义见AS 1289.5.8.4。通过直接测量或通过排水分别获得砌块的质量和砌块的体积来确定密度。AS 1289.5.8.4给出了一组标准密度砌块所需砌块数量的指南。

This Standard sets out the method for determination of the density of a Type A or Type C standard density block to be used in the calibration of nuclear surface moisture-density gauges in accordance with AS 1289.5.8.4. The Type A or Type C standard density blocks are defined in AS 1289.5.8.4. The density is determined by obtaining separately the mass of the block and the volume of the block either by direct measurement or by displacement of water. Guidance on the number of blocks required for a set of standard density blocks is given in AS 1289.5.8.4.