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