ASTM C1266-17 Standard Test Method for Flow Characteristics of Preformed Tape Sealants.pdf

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1、Designation: C1266 17Standard Test Method forFlow Characteristics of Preformed Tape Sealants1This standard is issued under the fixed designation C1266; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A nu

2、mber 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 describes a laboratory procedure fordetermining the flow characteristics of preformed tape sealantsafter a specified tim

3、e, temperature, and load.1.2 The values stated in SI units are to be regarded as thestandard. The inch-pound units given in parentheses areprovided for information purposes only.1.3 The committee with jurisdiction of this specification isnot aware of any similar specification within ISO or any other

4、organization.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-bility of regulatory limitations prior to use.2.

5、 Referenced Documents2.1 ASTM Standards:2C717 Terminology of Building Seals and Sealants3. Terminology3.1 DefinitionsThe definitions of the following terms usedin this test method are found in Terminology C717: compound,seal, sealant, standard conditions, substrate and tape sealant.4. Summary of Tes

6、t Method4.1 The tape sealant to be tested is rolled into spherical ballsof equal weight. Four spherical balls are placed between twoaluminum plates, which are then compressed. A standardweight is placed on the test assembly for1hatroomtemperature. The height of the test assembly is measured todeterm

7、ine the rebound of the sample. The test assembly is thenplaced in an 88C (190F) oven with the standard weight on it.After 24 h the height of the test assembly is measured again todetermine the flow of the sample.5. Significance and Use5.1 Tape sealants are tacky, deformable solids, which areused und

8、er compression between two or more surfaces ofsimilar or dissimilar substrates in a variety of sealing applica-tions. These tapes are normally supplied in a roll form with arelease paper interlever and are hand pressed against a fixedsubstrate. This procedure is designed to give an indication ofthe

9、flow characteristics of a tape sealant under controlledtemperature and aging conditions with a specified load.6. Apparatus6.1 Aluminum Plates, four, each 6.35 by 76.2 by 101.6 mm(0.25 by 3.00 by 4.00 in.).6.2 Lead Weights, two, each 3.63 kg (8.0 lb) with dimen-sions large enough to cover the entire

10、assembly, but notoverhanging the assembly.6.3 Mechanical Convection Oven, capable of maintaining atemperature of 88 6 1C (190 6 2F).6.4 Steel Spacers, six, each 76.2 by 5.08 by 5.08 6 0.05 mm(3.00 by 0.20 by 0.20 6 0.002 in.).6.5 Thickness Gage, having a total capacity of at least 76.2mm (3.00 in.)

11、graduated in 0.025 mm (0.001 in.) divisions. Thegage shall be equipped to provide a 57 g (2 oz) load over aminimum contact area of 6.35 mm (0.25 in.).6.6 Laboratory Press, at room temperature, to compress thepreformed sealant tape to the proper material thickness.6.7 Stop Watch, to measure the timed

12、 intervals specified inthe laboratory procedure.6.8 Laboratory Precision Balance (capable of weighing to0.1 mg) to measure the weight of the individual spherical ballsof tape.7. Sampling7.1 Samples to be tested shall be taken from a fresh roll oftape sealant taken directly from a randomly selected c

13、ommer-cial container as supplied by the manufacturer, after firstremoving and discarding approximately the first 0.61 (2 ft) ofthe roll.1This test method is under the jurisdiction ofASTM Committee C24 on BuildingSeals and Sealants and is the direct responsibility of Subcommittee C24.20 onGeneral Tes

14、t Methods.Current edition approved Jan. 1, 2017. Published February 2017. Originallyapproved in 1995. Last previous edition approved in 2011 as C126602(2011). DOI:10.1520/C1266-17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org

15、. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with interna

16、tionally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.18. Test Assembly Preparation8.1 A total of two ass

17、emblies per tape are to be prepared.8.1.1 Prepare a test assembly as follows:8.1.1.1 Clean two aluminum plates with isopropyl alcohol(IPA) or other suitable solvent.8.1.1.2 Using a marking pen, draw intersecting diagonals onone side of both metal plates. On each plate mark four points32 mm (1.25 in.

18、) from the intersection of the diagonals asshown in Fig. 1. These become the top surfaces.8.1.1.3 Stack the plates, and using the thickness gage,measure the combined height of two aluminum plates at theintersection of the diagonals. Record as aluminum thickness(A).8.1.1.4 Using a laboratory precisio

19、n balance, weigh out fourlengths of tape sealant to 4.00 6 0.05 g each. Each 4 g sampleshould be tightly rolled into a spherical ball without workingthe material excessively avoid entrapping air. Condition thefour balls of tape for 1 h according at standard conditionsbefore proceeding to 8.1.1.5.8.1

20、.1.5 Place each of the four4 g spherical balls of tapesealant at quarter points (31.75 mm (1.25 in.) from theintersection of the diagonals) of the diagonals on one of themetal plates.8.1.1.6 Place three steel spacers on the aluminum plate, oneinboard between the spherical balls of tape and one space

21、routboard of the balls of tape as shown in Fig. 2. The spacer barsshould not contact the compound.8.1.1.7 Position the other aluminum plate evenly over thespherical balls of tape sealant with the face marked withdiagonals away from the tape sealant (Fig. 2).8.1.1.8 Center the assembly on the base pl

22、ate of the labpress at room temperature and compress firmly to the spacerbars, until the spacer bars cannot be moved by hand. Maintainthis compression mode for 1 min. At the end of 1 min raise thepress and remove the assembly taking care not to disturb it.Carefully remove the spacer bars (see Fig. 3

23、).9. Conditioning9.1 Condition the test assemblies at standard conditions for1h.10. Procedure10.1 After1hatstandard conditions, using the thicknessgage, measure the thickness of each test assembly at theintersection of the diagonals to 0.025 mm (0.001 in.). Recordthis value as (B). For each assembly

24、 calculate the reboundheight of the tape sealant as follows:R 5 B 2 A (1)where:R = rebound height, mm (in.),B = combined aluminum and tape sealant thickness aftertime specified, mm (in.), andA = combined aluminum thickness as determined in 8.1.1.3,mm (in.).10.2 Place both test assemblies in a mechan

25、ical convectionoven maintained at 88 6 1C (190 6 2F). Position a 3.63 kg(8.0 lb) weight on top of each test assembly. Center the weighton each test assembly, avoiding sliding of the weight during thetest. Expose the test specimens at 88 6 1C (190 6 2F) for 24h.10.3 After 24 h, remove the test assemb

26、lies from the oven,remove the weight and allow the test assemblies to cool atstandard conditions for 15 min.10.4 Measure the thickness of each test assembly as de-scribed in 10.1 and record as value (C).11. Calculation11.1 For each assembly calculate the flow of the tape asfollows:F 5 B 2 C (2)where

27、:F = flow, mm (in.),B = combined aluminum and tape sealant thickness aftertime specified (see 10.1), mm (in.), andC = combined aluminum and tape sealant thickness afterexposure (see 10.4), mm (in.).11.2 For each assembly calculate the residual height of thetape as follows:H 5 R 2 F (3)where:H = resi

28、dual height after exposure, mm (in.),R = rebound height (see 10.1), mm (in.), andF = flow (see 11.1), mm (in.).11.3 For each assembly calculate the percent loss of heightof the tape as follows:height loss,%FR3100 (4)where:F = flow, mm (in.), andR = rebound height (see 10.1), mm (in.).FIG. 1 Intersec

29、ting Diagonals on Metal PlateC1266 17212. Report12.1 Report the following information:12.1.1 Flow of each specimen,12.1.2 Rebound height of each specimen, and12.1.3 The percent loss of height after exposure of eachassembly.FIG. 2 Steel SpacersFIG. 3 Test Assembly After CompressionC1266 17313. Precis

30、ion and Bias13.1 Precision:13.1.1 The precision calculations for this test method arebased on the results of four laboratories testing eight materialsusing two specimens per test.13.1.1.1 FlowAt 95 % confidence level a variation of asmuch as 0.40 mm (0.016 in.) can be expected within a lab and0.89 m

31、m (0.035 in.) between laboratories.13.1.1.2 ReboundAt 95 % confidence level a variation ofas much as 0.08 mm (0.003 in.) can be expected within alaboratory and 0.30 mm (0.011 in.) between laboratories.13.1.1.3 Percent Height LossAt 95 % confidence level avariation of as much as 6.6 % can be expected

32、 within alaboratory and 17.8 % between laboratories.14. Keywords14.1 flow; preformed tape sealant; rebound; tape; tape flowASTM 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 expr

33、essly 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 years andif not revise

34、d, 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 committee, which you may

35、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 State

36、s. 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). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 174