1、Designation: C 1016 02 (Reapproved 2008)Standard Test Method forDetermination of Water Absorption of Sealant Backing(Joint Filler) Material1This standard is issued under the fixed designation C 1016; the number immediately following the designation indicates the year oforiginal adoption or, in the c
2、ase of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers a laboratory procedure fordetermining the water absorption charac
3、teristics of sealantbacking and joint filler materials, hereinafter referred to asbacking.1.2 The values stated in SI units are to be regarded as thestandard. The inch-pound units in parentheses are for informa-tion only.1.3 The committee with jurisdiction over this standard is notaware of any compa
4、rable standards published by other ASTMcommittees or other organizations.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine
5、the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C 717 Terminology of Building Seals and Sealants3. Terminology3.1 DefinitionsRefer to Terminology C 717 for the fol-lowing terms used in this test method: joint filler, sealant, andsealant backing.4.
6、 Summary of Test Method4.1 The mass of three measured specimens of backing isdetermined. The specimens are then placed in room tempera-ture water for 24 h after which the specimens are removed fromthe water and their mass measured. The change in mass iscalculated, and the result is expressed as a ch
7、ange in mass perunit of volume.4.2 Procedure A measures the maximum amount of waterthat can enter the backing. Procedure B measures the amountof water that can enter the backing with the backing cut endssealed.5. Significance and Use5.1 This test method determines the amount of water ab-sorbed by a
8、backing material. Water absorption by the backingmay affect sealant performance.5.2 This test method is also useful when designating properstorage of back up material and in determining appropriateprecautions when using backing materials.5.3 The specifier, using this test method, can exercisejudgmen
9、t in the selection of backing materials based on waterabsorption characteristics.6. Apparatus6.1 Balance, sensitive to 0.1 g (0.004 oz).6.2 Rule, steel, graduated to 1.0 mm (;116 in.).6.3 Shallow Pan for Water, at least 50 mm (2 in.) deep and350 mm (14 in.) long.6.4 Paraffn Wax.7. Sampling7.1 Take s
10、amples from manufactured product. The numberof samples for each lot shall be agreed upon between thepurchaser and the seller. A sample shall consist of three testspecimens.1This test method is under jurisdiction of ASTM Committee C24 on BuildingSeals and Sealants and is the direct responsibility of
11、Subcommittee C24.20 onGeneral Test Methods.Current edition approved May 1, 2008. Published June 2008. Originallyapproved in 1984. Last previous edition approved in 2002 as C 1016 02.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.o
12、rg. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.2 Sample selection is important, therefore, the sampleshould b
13、e representative of typical backing production. Careshould be exercised in choosing samples that have not beendamaged by inappropriate storage or handling.7.3 Samples should be of uniform shape for their length toenable accurate calculation of volume.8. Test Specimens8.1 A test specimen is a piece o
14、f backing 300 6 5mm(126 0.25 in.) in length. Ideally the cross-sectional backing areashould be from 2 to 3 cm2(0.3 to 0.5 in.2). Cut three testspecimens from each sample.9. Conditioning9.1 Condition the test specimens at 23 6 2C (73 6 3F)and 50 6 5 % relative humidity for a minimum of 24 h priorto t
15、esting, provided the specimens feel and appear dry. Speci-mens that appear damp should be dried in accordance with themanufacturers recommendations before the 24 h conditioningperiod starts.10. Procedure10.1 Procedure A:10.1.1 Measure the mass of each conditioned specimen tothe nearest 0.1 g (0.004
16、oz) and record.10.1.2 Measure and record the length of each specimen tothe nearest 1 mm (116 in.).10.1.3 Measure and record the appropriate end dimensionsof each specimen to the nearest 1 mm (116 in.), to permit across-sectional area calculation.10.1.3.1 The procedures in 10.1.2 and 10.1.3 are criti
17、cal tothe precision and bias of the test. Care is required to obtainaccurate measurements.10.1.4 Submerge the entire specimen in water in a shallowpan. Secure the specimen so the top side in the long dimension,is approximately 25 mm (1 in.) below surface.10.1.5 After immersion for 24 h, remove the s
18、pecimen bypicking it up 3 in. (75 mm) from the ends and place itimmediately on the weighing platform. Do not press or squeezethe specimen. Within the next 1 min, record the mass of thespecimen. Within the next 1 min, record the mass of thespecimen to the nearest 0.1 g (0.004 oz).10.1.5.1 The weighin
19、g platform on the balance should belarge enough to support the entire specimen and serve as a trayto catch any water that may leave the specimen during massdetermination.10.2 . Procedure B:10.2.1 Measure and record the length of each specimen tothe nearest 1 mm (116 in.).10.2.2 Measure and record th
20、e appropriate end dimensionsof each specimen to the nearest 1 mm (116 in.), to permit across-sectional area calculation.10.2.2.1 The procedures in 10.2.1 and 10.2.2 are critical tothe precision and bias of the test. Care to obtain accuratemeasurements is required.10.2.3 Dip the cut ends of the speci
21、men to a depth of 3.0mm (18 in.) in melted paraffin wax at 65 6 5C, remove and letcool. Repeat the dipping three times until the ends arecompletely sealed by approximately 1 mm (116 in.) of paraffinwax on each cut end.10.2.4 After the wax cools, measure the mass of eachconditioned specimen to the ne
22、arest 0.1 g (0.004 oz) andrecord.10.2.5 Submerge the entire specimen in water in a shallowpan. Secure the specimen so the top side, in the long dimen-sion, is approximately 25 mm (1 in.) below the surface.10.2.6 After immersion for 24 h, remove the specimen bypicking it up 3 in. (75 mm) from the end
23、s and place itimmediately on the weighing platform. Do not press or squeezethe specimen. Within the next 1 min, record the mass of thespecimen to the nearest 0.1 g (0.004 oz).10.2.6.1 The weighing platform should be large enough tosupport the entire specimen and serve as a tray to catch anywater tha
24、t may leave the specimen during mass determination.11. Calculation11.1 Calculate each specimens dry cross-sectional area (A0)using the appropriate formula for the geometry of the cross-section shape.11.2 Calculate the dry, original volume, (V0), as follows:V05 103 A0where:V0= original dry volume, cm
25、3(in.3),A0= cross-sectional area cm2(in.2), and10= original length, cm (in.).11.3 Calculate water absorption as a mass per unit volumefor each specimen as follows:W 5m02 m1V0where:W = water absorption, g/cm3(oz/in.3),m1= initial mass, g (oz),m0= final mass, g (oz), andV0= initial dry volume, cm3(in.
26、3)11.4 For purposes of calculation it is assumed that, at 23 62C (73 6 3F) and atmospheric pressure, 1 g (0.035 oz) ofwater occupies 1 cm3(0.061 in.3) in volume.11.5 Calculate the sample average water absorption asfollows:Wa5W11 W21 W33where:Wa= average water absorption, g/cm3(oz/in.3),W1= Specimen
27、1 water absorption, g/cm3(oz/in.3),W2= Specimen 2 water absorption, g/cm3(oz/in.3), andW3= Specimen 3 water absorption, g/cm3(oz/in.3).12. Report12.1 Report the following information:12.1.1 Name and description of the tested backing material,12.1.2 Date of receipt of the backing material,12.1.3 Proc
28、edure A or B, and12.1.4 Individual specimen and sample average water ab-sorption values.C 1016 02 (2008)213. Precision and Bias313.1 These data were developed using 1.59 cm (58 in.)diameter closed cell, open cell, and soft-type backing material,therefore results may vary with different diameter back
29、ingmaterials.13.1.1 Procedure A:13.1.1.1 The repeatability (within a given laboratory) inter-val for three materials tested by four laboratories is 0.044g/cm3(0.025 oz/in.3). In future use of this test method, thedifference between two test results obtained in the samelaboratory on the same material
30、 will be expected to exceed0.044 g/cm3(0.025 oz/in.3) only about 5 % of the time.13.1.1.2 The reproducibility (between given laboratories)interval for three materials tested by four laboratories is 0.387g/cm3(0.222 oz/in.3). In future use of this test method, thedifference between test results obtai
31、ned in a different labora-tory on the same material will be expected to exceed 0.387g/cm3(0.222 oz/in.3) only about 5 % of the time.13.1.2 Procedure B:13.1.2.1 The repeatability (within a given laboratory) inter-val for three materials tested by four laboratories is 0.024g/cm3(0.014 oz/in.3). In the
32、 future use of this test method, thedifference between two test results obtained in the samelaboratory on the same material will be expected to exceed0.024 g/cm3(0.014 oz/in.3) only about 5 % of the time.13.1.2.2 The reproducibility (between given laboratories)interval for three materials tested by
33、four laboratories is 0.387g/cm3(0.217 oz/in.3). In future use of this test method, thedifference between two test results obtained in a differentlaboratory on the same material will be expected to exceed0.387 g/cm3(0.217 oz/in.3) only about 5 % of the time.14. Keywords14.1 sealant; sealant backing;
34、water absorptionASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of
35、such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for ad
36、ditional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to
37、the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).3Supporting data is available from ASTM Headquarters. Request RR:C24-1014.C 1016 02 (2008)3
