ASTM C322-2009 Standard Practice for Sampling Ceramic Whiteware Clays《卫生陶瓷粘土的取样标准试验方法》.pdf
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1、Designation: C 322 09Standard Practice forSampling Ceramic Whiteware Clays1This standard is issued under the fixed designation C 322; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parenthese
2、s indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This practice covers procedures for sampling bulk andbagged shipments of ceramic whiteware clays.1.2 The values stated in inch-pound units are to be regar
3、dedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user
4、of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Significance and Use2.1 Since many tests are performed using very smallamounts of powder, it is most important that the test portionsbe obtained in a stan
5、dardized manner. The practices describedhere take into account the possibility of segregation andvariability of the ceramic powder in containers of the varioussizes and numbers, both in dry and slurry forms.3. Sampling3.1 Where a bulk shipment consists of lumps, a number ofsamples shall be taken fro
6、m different parts of the rail car ortruck during unloading, so that the final sample will representan average of all parts of the shipment from top to bottom. Fora 30-ton (27-Mg) unit, no less than 20 samples of approxi-mately 10 lb (4.5 kg) each shall be taken from different parts ofthe rail car or
7、 truck. This may be done by removal duringloading or unloading, at spaced intervals. The lumps shall thenbe broken to pieces no larger than 4 in. (102 mm), in the largestdimension, and the several samples shall be made into acomposite lot, by turning with a shovel on a clean floor. Thecomposite shal
8、l then be quartered or riffled to provide a 10-lblaboratory sample.3.2 Sampling of hopper car or hopper truck shipments is tobe done during unloading of the car or truck.3.3 Where a bulk shipment consists of shredded or coarselyground clay, sampling shall be done at 20 points for a 30-ton(27-Mg) uni
9、t; the samples may be taken with a shovel, or witha grain sampler, if the form of the clay permits. The samples sotaken shall then be mixed thoroughly, and quartered or riffledto form a 10-lb (4.5kg) (or proportionately larger) laboratorysample.3.4 For bagged lots of ground or air-floated clay, the
10、numberof samples taken shall depend on the number of units in ashipment. A grain-sampler or similar sampling instrument shallbe used to take samples which then shall be combined, mixed,and quartered or riffled to obtain a 10-lb (4.5-kg) laboratorysample. Where a shipment consists of 100 bags or less
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