1、Designation: C 1016 02Standard 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 case of revision, t
2、he year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers a laboratory procedure fordetermining the water absorption characteristics of seal
3、antbacking 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 comparable standards p
4、ublished 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 the applica-bilit
5、y of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:C 717 Terminology of Building Seals and Sealants2E 691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method33. Terminology3.1 DefinitionsRefer to Terminology C 717 for the fol-lo
6、wing terms used in this test method: joint filler, sealant, andsealant backing.4. 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 ma
7、ss measured. The change in mass iscalculated, and the result is expressed as a change 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. Signif
8、icance and Use5.1 This test method determines the amount of water ab-sorbed by a 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
9、 backing materials.5.3 The specifier, using this test method, can exercisejudgment 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
10、 50 mm (2 in.) deep and350 mm (14 in.) long.6.4 Paraffn Wax.47. Sampling7.1 Take samples 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.7.2 Sample selection is important, therefore,
11、the sampleshould be 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.1This test method is under juri
12、sdiction of ASTM Committee C24 on BuildingSeals and Sealants and is the direct responsibility of Subcommittee C24.20 onGeneral Test Methods.Current edition approved Jan. 10, 2002. Published March 2002. Originallypublished as C 1016 84. Last previous edition C 1016 94a.2Annual Book of ASTM Standards,
13、 Vol 04.07.3Annual Book of ASTM Standards, Vol 14.02.4Paraffin wax, manufactured by Thomas Scientific, 99 High Hills Rd., Swedes-boro, NJ 08085, or equal, has been found suitable for this purpose.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, Uni
14、ted States.8. Test Specimens8.1 A test specimen is a piece of 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)an
15、d 50 6 5 % relative humidity for a minimum of 24 h priorto testing, 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 m
16、ass of each conditioned specimen tothe nearest 0.1 g (0.004 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 calcul
17、ation.10.1.3.1 The procedures in 10.1.2 and 10.1.3 are critical 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.)
18、 below surface.10.1.5 After immersion for 24 h, remove the specimen 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 thes
19、pecimen to the nearest 0.1 g (0.004 oz).10.1.5.1 The weighing 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 specim
20、en tothe nearest 1 mm (116 in.).10.2.2 Measure and record the 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 accuratem
21、easurements is required.10.2.3 Dip the cut ends of the specimen 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 c
22、ools, measure the mass of eachconditioned specimen to the nearest 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, re
23、move the specimen 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 to the nearest 0.1 g (0.004 oz).10.2.6.1 The weighing platform should be large enough tosupport t
24、he entire specimen and serve as a tray to catch anywater that 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,
25、(V0), as follows:V05 103 A0where:V0= original dry volume, cm3(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
26、),m0= final mass, g (oz), andV0= initial dry volume, cm3(in.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 W33wher
27、e:Wa= average water absorption, g/cm3(oz/in.3),W1= Specimen 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 materia
28、l,12.1.2 Date of receipt of the backing material,12.1.3 Procedure A or B, and12.1.4 Individual specimen and sample average water ab-sorption values.13. Precision and Bias513.1 These data were developed using 1.59 cm (58 in.)diameter closed cell, open cell, and soft-type backing material,therefore re
29、sults may vary with different diameter backingmaterials.5Supporting data is available from ASTM Headquarters. Request RR:C24-1014.C101602213.1.1 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).
30、In future use of this test method, thedifference between two test results obtained in the samelaboratory on the same material 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 b
31、y four laboratories is 0.387g/cm3(0.222 oz/in.3). In future use of this test method, thedifference between test results obtained 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 repeatabili
32、ty (within a given laboratory) inter-val for three materials tested by four laboratories is 0.024g/cm3(0.014 oz/in.3). In the 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
33、) only about 5 % of the time.13.1.2.2 The reproducibility (between given laboratories)interval for three materials tested by 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 materia
34、l 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; 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
35、 standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of 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 year
36、s andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committ
37、ee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to 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).C1016023
