The effectiveness of the test procedure was evaluated by the international collaboration program as a work of the Correspondence Group established under DSC Sub-Committee. It is our great pleasure that this test procedure will contribute to safe and efficient transportation of solid bulk materials.

　

7　Acknowledgement

The Nippon Foundation financially supported the research project. In the work of the Correspondence Group, Poland carried out the experiments. Poland and Canada sent the samples to us. Australia also cooperated with the work of the Correspondence Group. Japan Mining Industry Association sent the samples to us. We highly appreciate contribution of all those people and other people related to this research.

　

References

(1)　The International Convention for the Safety of Life at Sea, 1974

(2)　Code of Safe Practice for Solid Bulk Cargoes (BC Code), 1998 Edition

(3)　DSC 2/12/1, "New procedure for evaluating liquefaction potential of solid bulk materials", by Japan, 1997

(4)　DSC 3/11/2. "Use of the Japanese Penetration Method for the determination of the FMP in coarse grained galena concentrates", by Poland, 1998

(5)　DSC 3/INF.6, "Amendments to the BC Code including evaluation of properties of solid bulk cargoes", by Poland, 1998

(6)　DSC 3/11/5, "Comments on the proposed new test procedures for evaluating liquefaction potential of solid bulk materials (DSC 2/12/1)", by Canada, 1998

(7)　DSC 4/5/4, "Additional investigations into Japanese liquefaction potential test for solid bulk materials", by Poland, 1999

(8)　DSC 4/5/5 "New procedure for evaluating liquefaction potential of solid bulk materials", by Japan, 1999

(9)　DSC 5/5/8, "Progress report of the Correspondence Group on Evaluation of the Liquefaction Potential of Solid Bulk Cargoes", by Japan, 2000

(10)　DSC 6/5/3, "Report of the Correspondence Group on Evaluation of the Liquefaction Potential of Solid Bulk Cargoes", by Japan, 2001.

　

Appendix 1: Definition of technical terms

　

Solid bulk materials consist of solid part, water (moisture) and air, in general. The following terms and nomenclatures are used in this paper. Weight of air is neglected.

W_S: Weight of solid (dry weight);

W_W: Weight of water;

W_T: Total weight, W_T=W_S+W_W;

γ_S: Specific weight of solid;

V_S: Volume of solid, V_S=W_S/γ_S;

V_W: Volume of water;

V_A: Volume of air;

V_V: Volume of void, V_V=V_W+V_A;

M_C: Moisture content;

e : Void ratio, e = V_V/V_S; and

S_γ: Degree of saturation, S_γ=V_W/V_V.

Unless expressly described otherwise, moisture content of the sample is represented by the gross moisture content by weight, as follows:

M_C=W_W/W_T,

　

Appendix 2: Formulae for Liquefaction Potential Test

　

Equations for calculating various values in the Liquefaction Potential Test are presented in this appendix. Following parameters are measured in the test. Here, each number in brackets corresponds to the step in the test procedure mentioned in paragraph 4 of this p ap er.

(1)　Specific weight of solids, γ_S, is determined;

(2)　Volume of the specimen, V_T, is measured and the empty weight of the mould, W_E, is measured;

(9)　Total weight of the mould before drainage, W'_M, is measured;

(11)　Total weight of the mould after drainage, W_M, is measured;

(12)　Moisture content of the specimen after drainage. M_C, is measured.

The total weight of specimen after drainage, W_T, dry weight, W_S, weight of water after drainage, W_Wp, volume of solids, V_S, volume of void, V_V, volume of water after drainage, V_W and degree of saturation after drainage, S_γ, can be calculated with the following formulae:

W_T=W_M-W_E

W_S=W_T×(1-M_C)

W_W=W_T×M_C

V_S=W_S/γ_S

V_V=V_T-V_S

V_W=W_W/γ_W

S_γ=V_W/V_V

Here, specific weight of water is assumed to be 1. Weight of water before drainage, W'_W, volume of water before drainage, V'_W and degree of saturation before drainage, S'_γ, can be calculated with the following formulae:

W'_W=W_W+W'_M-W_M

V'_W=W'_W/γ_W

S'γ=V'_W/V_V

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