1、Designation: C639 01 (Reapproved 2011)C639 15Standard Test Method forRheological (Flow) Properties of Elastomeric Sealants1This standard is issued under the fixed designation C639; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, th
2、e 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.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 This test method descr
3、ibes a laboratory procedure for the determination of rheological (flow) properties of single- andmulticomponent chemically curing sealants for use in building construction.1.2 Other suitable flow characteristics may be agreed upon between the seller and purchaser or specifier. Special nonsagproperti
4、es and lower flow characteristics may be required for use in sloping joints where absolute leveling is not desired.NOTE 1The sealants are supplied in various rheological properties ranging from pourable fluids to stiff nonsagging pastes. Multicomponent sealantsare supplied as a base component with a
5、n activator or curing agent separately packaged. After mixing the multiple parts, the sealant is ready forapplication. Single-component sealants are supplied ready for use upon opening of the package and usually depend on the external environment for cure.1.3 This test method describes four types of
6、 joint sealants:1.3.1 Type ISingle-component flowable or self-leveling,1.3.2 Type IISingle-component nonsag,1.3.3 Type IIIMulticomponent flowable or self-leveling, and1.3.4 Type IVMulticomponent nonsag.1.4 The values stated in SI units are to be regarded as the standard. The values given in parenthe
7、ses are for information only.1.5 This standard does not purport to address the safety problems associated with its use. It is the responsibility of the user ofthis standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations priorto use.2. R
8、eferenced Documents2.1 ASTM Standards:2C717 Terminology of Building Seals and Sealants3. Terminology3.1 DefinitionsRefer to Terminology C717, Section 4.1, for definitions of the following terms used in this standard:chemically curing sealants, compound, elastomeric, flow (slump), non-sag sealant (no
9、n-slump), sealant, self-leveling sealant(flowable). (flowable), standard conditions.4. Comparison to Other Standards4.1 ISO 7390:1987 Building Construction-Jointing Products-Determination of Resistance to Flow5. Significance and Use5.1 The results obtained from this test method are simply a measure
10、of the degree of horizontal or vertical flow ofsingle-component or multi-component sealants when applied to a set joint configuration at two pre-determined temperatures. Onlysamples conditioned at the same temperature may be directly compared.1 This test method is under the jurisdiction of ASTM Comm
11、ittee C24 on Building Seals and Sealants and is the direct responsibility of Subcommittee C24.20 on GeneralTest Methods.Current edition approved June 1, 2011June 1, 2015. Published August 2011August 2015. Originally approved in 1969. Last previous edition approved in 20072011 asC639 01 (2007).(2011)
12、. DOI: 10.1520/C0639-01R11.10.1520/C0639-15.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is
13、not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropri
14、ate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States16. Apparatus6.1 Refrigerator, controlled at 4.4 6 2C (40 6 3.6F).
15、6.2 Oven, convention-type, controlled at 50 6 2C (1226 3.6F).6.3 Channel, one, stainless steel (Type 304, No. 2-B finish, No. 16 gage), inside dimensions 19 mm wide, 13 mm deep, 152mm long (34 by 12 by 6 in.), and closed at both ends (see Fig. 1a).6.4 Channels, two, stainless steel (Type 304, No. 2-
16、B finish, No. 16 gage), inside dimensions 19 mm wide, 13 mm deep, 152mm long (34 by 12 by 6 in.) with both ends open and the back surface extended 51 mm (2 in.) (see Fig. 1b).7. Standard Test Conditions7.1 Unless otherwise specified, standard conditions shall be 23 6 2Cdefined in Terminology C717(73
17、.4 6 3.6F) and 50 65 % relative humidity8. Procedures8.1 Test for Type I Sealants:8.1.1 Clean the closed-end channel (Fig. 1a) with methyl ethyl ketone or similar solvent followed by a thorough cleaning witha detergent solution and a final rinse with distilled or deionized water, and then air dry.8.
18、1.2 Before preparing the test assembly, condition at least 100 g of the compound under test in the unopened container for atleast 16 h at standard conditions. Then condition the compound for 16 to 24 h and the channel for 2 h in a refrigerator held at 4.46 2C (40 6 3.6F). At the end of the condition
19、ing periods, pour the compound into the conditioned channel held horizontallyat the latter temperature and maintain the test specimen at this temperature for 4 h.At the end of this period, examine the compoundfor flow properties.8.2 Tests for Type II Sealants:8.2.1 Vertical SlumpBefore preparing the
20、 test assemblies, condition the compound at standard conditions as described in 8.1.2.Expose the two channels with open ends (Fig. 1b), cleaned as indicated in 8.1.1, for 2 h, one at 4.4 6 2C (40 6 3.6F) and theother at 506 2C (122 6 3.6F). At the end of this conditioning period, remove the channels
21、 from the respective chambers andfill them with compound within 10 min.The channels may be filled with the aid of a spatula and shall be trimmed so that the sealantis flush with the face and ends of the channels. Return the filled channels to their respective chambers, placing them in a verticalposi
22、tion, with the 51-mm (2-in.) extension at the bottom for 4 h. At the end of this period remove the channels from the chambersand measure, to the nearest 1.5 mm (116 in.), the distance that the bottom edge of sealant moves downward along the 51-mmextended back surface. This distance is the sag of the
23、 compound.8.2.2 Horizontal SlumpRepeat the procedure described in 8.2.1 with the following change: after filling the channels, returnthem to their respective chambers, placing them in a horizontal position resting on the 13-mm (12-in.) side. At the end of theexposure period, remove the channels from
24、 the chambers and note any change in the configuration of the compound in thechannels.FIG. 1 Channels Used for Determining Rheological Properties; (a) for Self-Leveling or Flow-Type Compound; (b) for Nonsag-Type Com-poundC639 1528.3 Test for Type III SealantsThe test procedure shall be the same as t
25、hat described in 8.1 with the following exception: Afterconditioning the base and curing agent separately for 16 to 24 h and the channel for 2 h in the refrigerator, remove and hand mixthem for at least 5 min. Return the mixed compound to the cold box for an additional 30 min. Then pour the compound
26、 into thehorizontal channel and proceed as described in 8.1.2. Examine the compound for flow properties.8.4 Tests for Type IV Sealants:8.4.1 Vertical SlumpTest as in 8.2.1 with the following exception: Immediately before removing the conditioned channelsfrom the refrigerator and oven, hand mix at le
27、ast 200 g of the base compound and the appropriate amount of curing agent for 5min. Fill the channels within 10 min (or longer if specified by the manufacturer) and proceed as in 8.2. At the end of the test,measure the sag to the nearest 1.5 mm (116 in.).8.4.2 Horizontal SlumpFollow the procedure de
28、scribed in 8.4.1 with the change indicated in 8.2.2.9. Report9.1 Report the following information:9.1.1 Name or other identification of the sealant.9.1.2 Flow Test:9.1.2.1 Whether Type I or III sealant was used,9.1.2.2 Whether the compound self-leveled in channel, and9.1.2.3 Any other surface condit
29、ions such as bubbling.9.1.3 Sag Test:9.1.3.1 Whether Type II or Type IV sealant was used,9.1.3.2 Amount of sag of the compound when placed in the vertical position, to the nearest 1.5 mm (116 in.), and9.1.3.3 Any change in the configuration of the compound when placed in the horizontal position.9.1.
30、4 Variations in Test MethodAny variation from the specified test procedure.NOTE 2Unusual application conditions or use of heat applied sealants may require variation in testing time or temperature. There also may benecessary variations in positioning of channels other than strictly horizontal or ver
31、tical. These may be determined by agreement and reported accordinglyunder 9.1.4.10. Precision and Bias310.1 The statistics for this test method are based on four materials tested once in two laboratories. This does not make rigorousstatistical treatment possible, but approximations can be made. The
32、conclusions is that at 95 % confidence, a variation of no morethan 6.35 mm (0.25 in.) should occur.11. Keywords11.1 flow; rheology; sagASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this stand
33、ard 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 years andi
34、f 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 committee, whi
35、ch 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,U
36、nited 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). 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:/ Supporting data are available from ASTM Headquarters. Request RR: C24 1011.C639 153
