ASTM C639-2001(2007) Standard Test Method for Rheological (Flow) Properties of Elastomeric Sealants《弹性密封料流变(流动)特性的标准试验方法》.pdf

1、Designation: C 639 01 (Reapproved 2007)Standard Test Method forRheological (Flow) Properties of Elastomeric Sealants1This standard is issued under the fixed designation C 639; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the yea

2、r 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This test method describes a la

3、boratory procedure forthe determination of rheological (flow) properties of single-and multicomponent chemically curing sealants for use inbuilding construction.1.2 Other suitable flow characteristics may be agreed uponbetween the seller and purchaser or specifier. Special nonsagproperties and lower

4、 flow characteristics may be required foruse in sloping joints where absolute leveling is not desired.NOTE 1The sealants are supplied in various rheological propertiesranging from pourable fluids to stiff nonsagging pastes. Multicomponentsealants are supplied as a base component with an activator or

5、 curingagent separately packaged. After mixing the multiple parts, the sealant isready for application. Single-component sealants are supplied ready foruse upon opening of the package and usually depend on the externalenvironment for cure.1.3 This test method describes four types of joint sealants:1

6、.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 thestandard. The values given in parentheses are for informa

7、tiononly.1.5 This standard does not purport to address the safetyproblems associated with its use. It is the responsibility of theuser of this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2

8、.1 ASTM Standards:2C 717 Terminology of Building Seals and Sealants3. Terminology3.1 DefinitionsRefer to Terminology C 717, Section 4.1,for definitions of the following terms used in this standard:chemically curing sealants, compound, elastomeric, flow(slump), non-sag sealant (non-slump), sealant, s

9、elf-levelingsealant (flowable).4. Comparison to Other Standards4.1 ISO 7390:1987 Building Construction-JointingProducts-Determination of Resistance to Flow5. Significance and Use5.1 The results obtained from this test method are simply ameasure of the degree of horizontal or vertical flow ofsingle-c

10、omponent or multi-component sealants when appliedto a set joint configuration at two pre-determined temperatures.Only samples conditioned at the same temperature may bedirectly compared.6. Apparatus6.1 Refrigerator, controlled at 4.4 6 2C (40 6 3.6F).6.2 Oven, convention-type, controlled at 50 6 2C

11、(12263.6F).6.3 Channel, one, stainless steel (Type 304, No. 2-B finish,No. 16 gage), inside dimensions 19 mm wide, 13 mm deep,152 mm long (34 by12 by 6 in.), and closed at both ends (seeFig. 1a).6.4 Channels, two, stainless steel (Type 304, No. 2-B finish,No. 16 gage), inside dimensions 19 mm wide,

12、13 mm deep,152 mm long (34 by12 by 6 in.) with both ends open and theback surface extended 51 mm (2 in.) (see Fig. 1b).7. Standard Test Conditions7.1 Unless otherwise specified, standard conditions shall be23 6 2C (73.4 6 3.6F) and 50 6 5 % relative humidity.8. Procedures8.1 Test for Type I Sealants

13、:8.1.1 Clean the closed-end channel (Fig. 1a) with methylethyl ketone or similar solvent followed by a thorough cleaningwith a detergent solution and a final rinse with distilled ordeionized water, and then air dry.1This test method is under the jurisdiction ofASTM Committee C24 on BuildingSeals and

14、 Sealants and is the direct responsibility of Subcommittee C24.20 onGeneral Test Methods.Current edition approved June 1, 2007. Published July 2007. Originally approvedin 1969. Last previous edition approved in 2001 as C 639 01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or

15、contact ASTM Customer Service at serviceastm.org. 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.8.1.2 Before prepa

16、ring the test assembly, condition at least100 g of the compound under test in the unopened container forat least 16 h at standard conditions. Then condition thecompound for 16 to 24 h and the channel for2hinarefrigerator held at 4.4 6 2C (40 6 3.6F). At the end of theconditioning periods, pour the c

17、ompound into the conditionedchannel held horizontally at the latter temperature and maintainthe test specimen at this temperature for 4 h. At the end of thisperiod, examine the compound for flow properties.8.2 Tests for Type II Sealants:8.2.1 Vertical SlumpBefore preparing the test assemblies,condit

18、ion the compound at standard conditions as described in8.1.2. 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 63.6F) and the other at 506 2C (122 6 3.6F). At the end ofthis conditioning period, remove the channels from the respec-tive cham

19、bers and fill them with compound within 10 min. Thechannels may be filled with the aid of a spatula and shall betrimmed so that the sealant is flush with the face and ends ofthe channels. Return the filled channels to their respectivechambers, placing them in a vertical position, with the 51-mm(2-in

20、.) extension at the bottom for 4 h. At the end of this periodremove the channels from the chambers and measure, to thenearest 1.5 mm (116 in.), the distance that the bottom edge ofsealant moves downward along the 51-mm extended backsurface. This distance is the sag of the compound.8.2.2 Horizontal S

21、lumpRepeat the procedure described in8.2.1 with the following change: after filling the channels,return them to their respective chambers, placing them in ahorizontal position resting on the 13-mm (12-in.) side. At theend of the exposure period, remove the channels from thechambers and note any chan

22、ge in the configuration of thecompound in the channels.8.3 Test for Type III SealantsThe test procedure shall bethe same as that described in 8.1 with the following exception:After conditioning the base and curing agent separately for 16to 24 h and the channel for2hintherefrigerator, remove andhand

23、mix them for at least 5 min. Return the mixed compoundto the cold box for an additional 30 min. Then pour thecompound into the horizontal channel and proceed as describedin 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 fo

24、llowingexception: Immediately before removing the conditioned chan-nels from the refrigerator and oven, hand mix at least 200 g ofthe base compound and the appropriate amount of curing agentfor 5 min. Fill the channels within 10 min (or longer ifspecified by the manufacturer) and proceed as in 8.2.A

25、t the endof the test, measure the sag to the nearest 1.5 mm (116 in.).8.4.2 Horizontal SlumpFollow the procedure described in8.4.1 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

26、 or III sealant was used,9.1.2.2 Whether the compound self-leveled in channel, and9.1.2.3 Any other surface conditions 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 thevertical position, to the nearest 1.5 mm

27、(116 in.), and9.1.3.3 Any change in the configuration of the compoundwhen placed in the horizontal position.9.1.4 Variations in Test MethodAny variation from thespecified test procedure.NOTE 2Unusual application conditions or use of heat applied sealantsmay require variation in testing time or tempe

28、rature. There also may benecessary variations in positioning of channels other than strictly hori-zontal or vertical. These may be determined by agreement and reportedaccordingly under 9.1.4.10. Precision and Bias310.1 The statistics for this test method are based on fourmaterials tested once in two

29、 laboratories. This does not makerigorous statistical treatment possible, but approximations canbe made. The conclusions is that at 95 % confidence, avariation of no more than 6.35 mm (0.25 in.) should occur.11. Keywords11.1 flow; rheology; sag3Supporting data are available from ASTM Headquarters. R

30、equest RR:C 24 1011.FIG. 1 Channels Used for Determining Rheological Properties; (a)for Self-Leveling or Flow-Type Compound; (b) for Nonsag-TypeCompoundC 639 01 (2007)2ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin t

31、his standard. Users of this 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

32、be reviewed every five years 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 there

33、sponsible technical committee, 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,

34、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).C 639 01 (2007)3