Other information obtained through the tests
10 It should be noted that the size of the mould, i.e., the size of specimen, in Liquefaction Potential Test by Poland was different from one by Japan (c.f. paragraph 4.2 in the annex). It is supposed that the difference between the degrees of saturation after drainage for Sedimentary Galena by Poland and Japan is caused by the differences in condition on drainage and condition on compaction due to the difference in size of specimen. Though the results of Liquefaction Potential Tests by Poland and Japan did not fully agreed, significant data on Liquefaction Potential Test were acquired through the work of the Correspondence Group.
11 The results of the tests also provide some information on liquefaction as follows:
.1 There is no significant difference between Sedimentary Galena, which is empirically judged as not liable to liquefy, and Carol Lake Iron Ore Concentrate in regard to permeability. Furthermore, it is possible to determine the Transportable Moisture Limit for Sedimentary Galena. In view of these, the liquefaction potential of Sedimentary Galena should be deliberated;
.2 Transportable Moisture Limit of each sample determined by Penetration Test was lower than one determined by Proctor/Fagerberg Test; and
.3 The difference between Transportable Moisture Limits for each sample determined by Penetration Tests by Poland and Japan is deemed to be caused by the difference in compaction conditions, i.e., tamping procedures (c.f. Table 5 in the annex). In other words, the effect of the tamping procedure on the Transportable Moisture Limit can be observed based on the results of the tests.
Action requested of the Sub-Committee
12 The Sub-Committee is invited to take note of the work of the Correspondence Group and take action as it deems appropriate.