CAN/BNQ 2501-255-M92

1. OBJECT AND SCOPE OF APPLICATIOn The present standard describes the method to determine the relation between the moisture content and the density of soils and soil aggregates when these are compacted in standard moulds using 4,54 kg rammers dropped a height of 457 mm. Four methods are described herein. NOTE 1 - The laboratory compaction tests described in this standard generally provide good measures of optimum moisture contents and maximum densities except for soils and soil aggregates of high permeability. For these materials the given tests often do not provide accurate moisture-density relations, and the maximum masses thus derived are generally lower than those obtained using vibration methods. 1.1 Method a The test is carried out on material passing through the 5 mm sieve in a mould of 101,6 mm in diameter. 1.2 Method b The test is carried out on material passing through the 5 mm sieve in a mould of 152,4 mm in diameter. 1.3 Method c The test is carried out on material passing through the 20 mm sieve in a mould of 152,4 mm in diameter. 1.4 Method d The test is carried out in a mould of 152,4 mm in diameter on material passing through the 20 mm sieve and then corrected by replacing the material retained by the 20 mm diameter sieve. NOTE 2 - The method to be used is usually specified by the requesting party. If no method is specified, the procedure described in chapter 5 shall be followed.