MSC 85/26/Add.2 ANNEX 3 RESOLUTION MSC.268(85) - US Coast ...
MSC 85/26/Add.2 ANNEX 3 RESOLUTION MSC.268(85) - US Coast ... MSC 85/26/Add.2 ANNEX 3 RESOLUTION MSC.268(85) - US Coast ...
MSC 85/26/Add.2ANNEX 3Page 3401.2.3 Procedure1.2.3.1 Preparation of the test sample and the vibrating table:.1 The quantity of the sample required is approximately six times or more thecapacity of the selected cylindrical vessel. The amount of representative testsample with which each container is filled should be as follows:approximately 1,700 cm 3 for the small container, and 4,700 cm 3 for the largecontainer..2 Mix the sample well and divide into three approximately equal sub-samples,namely (A), (B) and (C). The sub-sample (A) should be immediately weighedand placed in the drying oven to determine the moisture content of the sample“as received”.The sub-samples (B) and (C) are used for the preliminary test and the main test,respectively..3 The vibration level of the vibrating table should be calibrated, using anacceleration meter, prior to carrying out testing. The acceleration of the tableshould be adjusted to 2g rms + 10% with a container filled with a sample mountedon the table.1.2.3.2 Preliminary flow moisture testThis test is intended to measure quickly the approximate flow moisture point, usingsub-sample (B). Water is added in increments after every penetration test. When a flow state hasbeen reached, the moisture content of the sample just above the flow state is measured.The moisture content of the sample just below the flow state can be calculated by deducting theincrement of water last added from the gross mass of the sample..1 Fill the appropriate cylindrical vessel with sub-sample (B) in four distinct stagesand tamp after the addition of each layer using a specified tamper. Tamp toa pressure denoted in 1.1.4.1 for mineral concentrates or to 40 kPa for coals, andapply the pressure evenly over the whole surface area of the material untila uniformly flat surface is obtained..2 Place the penetration bit on the surface of the material through the holder..3 Operate the vibrator at a frequency of 50 Hz or 60 Hz with an accelerationof 2g rms + 10% for 6 minutes. If necessary, the acceleration level should bechecked by referring to the output of the acceleration meter attached to thevibrating table..4 After 6 minutes of vibration, read the depth of penetration.I:\MSC\85\26-Add-2.doc
MSC 85/26/Add.2ANNEX 3Page 341.5 When the depth of penetration is less than 50 mm, it is judged that liquefaction didnot take place. Then:.1 Remove the material from the cylindrical vessel and replace in the mixingbowl with the remainder of the sample..2 Mix well and weigh the contents of the mixing bowl..3 Sprinkle an increment of water of not more than 1% of the mass of thematerial in the bowl and mix well..4 Repeat the procedure described in 1.2.3.2.1 to 1.2.3.2.5..6 When the depth of penetration is greater than 50 mm, it is judged that liquefactiontook place. Then:.1 Remove the material from the cylindrical vessel and replace in themixing bowl..2 Measure the moisture content in accordance with the procedure describedin 1.1.4.4..3 Calculate the moisture content of the sample just below the flow moisturepoint on the basis of the amount of water added..7 If the penetration depth in the first attempt exceeds 50 mm, i.e. the sample asreceived liquefied, mix sub-samples (B) and (C) and dry at room temperature toreduce the moisture. Then, divide the material into two sub-samples (B) and (C),and repeat the preliminary test.1.2.3.3 The main flow moisture test.1 On the basis of the preliminary test, the main test should be carried out todetermine the flow moisture point more accurately..2 Adjust the moisture content of the sub-sample (C) to the last value, which did notcause flow in the preliminary flow moisture test..3 The first test of the main flow moisture test is carried out on this adjusted samplein the same manner as described in 1.2.3.2. In this case, however, the addition ofwater in increments should not be more than 0.5% of the mass of the test material..4 When the approximate value of the flow moisture point is known in advance, themoisture content of the sub-sample (C) is adjusted to approximately 90% ofthis value..5 When a flow state has been reached, the flow moisture point is determined asdescribed in 1.1.4.3.I:\MSC\85\26-Add-2.doc
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<strong>MSC</strong> <strong>85</strong>/<strong>26</strong>/<strong>Add.2</strong><strong>ANNEX</strong> 3Page 341.5 When the depth of penetration is less than 50 mm, it is judged that liquefaction didnot take place. Then:.1 Remove the material from the cylindrical vessel and replace in the mixingbowl with the remainder of the sample..2 Mix well and weigh the contents of the mixing bowl..3 Sprinkle an increment of water of not more than 1% of the mass of thematerial in the bowl and mix well..4 Repeat the procedure described in 1.2.3.2.1 to 1.2.3.2.5..6 When the depth of penetration is greater than 50 mm, it is judged that liquefactiontook place. Then:.1 Remove the material from the cylindrical vessel and replace in themixing bowl..2 Measure the moisture content in accordance with the procedure describedin 1.1.4.4..3 Calculate the moisture content of the sample just below the flow moisturepoint on the basis of the amount of water added..7 If the penetration depth in the first attempt exceeds 50 mm, i.e. the sample asreceived liquefied, mix sub-samples (B) and (C) and dry at room temperature toreduce the moisture. Then, divide the material into two sub-samples (B) and (C),and repeat the preliminary test.1.2.3.3 The main flow moisture test.1 On the basis of the preliminary test, the main test should be carried out todetermine the flow moisture point more accurately..2 Adjust the moisture content of the sub-sample (C) to the last value, which did notcause flow in the preliminary flow moisture test..3 The first test of the main flow moisture test is carried out on this adjusted samplein the same manner as described in 1.2.3.2. In this case, however, the addition ofwater in increments should not be more than 0.5% of the mass of the test material..4 When the approximate value of the flow moisture point is known in advance, themoisture content of the sub-sample (C) is adjusted to approximately 90% ofthis value..5 When a flow state has been reached, the flow moisture point is determined asdescribed in 1.1.4.3.I:\<strong>MSC</strong>\<strong>85</strong>\<strong>26</strong>-Add-2.doc
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