ASTM C121-2006 Standard Test Method for Water Absorption of Slate《石板吸水性的标准试验方法》.pdf
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1、Designation: C 121 06Standard Test Method forWater Absorption of Slate1This standard is issued under the fixed designation C 121; 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 parentheses in
2、dicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.INTRODUCTIONIt is often desirable to gain some idea of the porosity of a material in ques
3、tion.Actual determinationsof the pore space require the use of rather elaborate and refined equipment as well as considerableprecision in carrying out the tests. For comparative purposes the absorption test affords a simple andsufficiently accurate means of obtaining the desired information. As appl
4、ied to slate this test requiressomewhat more care and precision than many other materials because of its dense nature and,consequently, the small quantities to be dealt with. Furthermore, the cleavage of slatethat propertywhich permits it to be split into thin sheets of uniform thicknessmust be take
5、n into considerationwhen this test is made. On this account misleading results are often obtained on cubical specimens dueto accidental cleavage cracks in the specimens. The shapes of specimens and larger number ofspecimens recommended in the following procedure are intended to eliminate to a large
6、extent theinconsistent results which may be obtained on this material.1. Scope1.1 This test method covers the determination of the waterabsorption of slate.1.2 This standard does not purport to address the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this s
7、tandard to consult and establish appropriatesafety and health practices and determine the applicability ofregulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:C119 Terminology Relating to Dimension Stone3. Terminology3.1 DefinitionsAll definitions are in accordance with Ter-
8、minology C119.4. Significance and Use4.1 This test method is useful in indicating the differences inwater absorption of slates. This test method also provides oneelement in the comparison of slates.5. Test Specimens5.1 The test specimens shall consist of square or rectangularslabs from316 to516 in.
9、(4.8 to 7.9 mm) in thickness and notless than 4 in. (101.6 mm) on any side.5.2 Not less than six specimens shall be prepared from eachsample of slate, the sample being considered as any number ofpieces selected to represent a definite part or grade of thedeposit.6. Sampling6.1 Select the sample to r
10、epresent a true average of the typeor grade of stone under consideration and of the qualitysupplied to the market under the type designation to be tested.The sample may be selected by the purchaser or his authorizedrepresentative from the quarried stone or taken from the naturalledge and shall be of
11、 adequate size to permit the preparation ofthe desired number of test specimens. When perceptiblevariations occur, the purchaser may select as many samples asare necessary for determining the variations in water absorp-tion of slate.7. Preparation of Specimens7.1 Split the slate to the required thic
12、kness and saw to size.When the specimens are prepared from shingles no saw cutshall be nearer than 1 in. (25.4 mm) to the sheared edge of theshingle.1This test method is under the jurisdiction of ASTM Committee C18 onDimension Stone and is the direct responsibility of Subcommittee C18.01 on TestMeth
13、ods.Current edition approved Feb. 1, 2006. Published February 2006. Originallyapproved in 1925 as C 121 25 T. Last previous edition approved in 1999 asC 121 90(1999).1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.2 Free the specim
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