1、Designation: D 2452 03 (Reapproved 2009)Standard Test Method forExtrudability of Oil- and Resin-Base Caulking Compounds1This standard is issued under the fixed designation D 2452; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the
2、 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 describes the laboratory procedure fordetermining the rate of extrusion of oil- and resin-ba
3、se caulk-ing compounds.1.2 The values stated in metric (SI) units are to be regardedas the standard. The values given in parentheses are providedfor information only.1.3 The subcommittee with jurisdiction is not aware of anysimilar ISO standard.1.4 This standard does not purport to address all of th
4、esafety 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. Referenced Documents2.1 ASTM Standards:2C 717 Terminology of Buildi
5、ng Seals and SealantsD 1475 Test Method For Density of Liquid Coatings, Inks,and Related Products3. Terminology3.1 DefinitionsDefinitions of the following terms arefound in Terminology C 717: caulking compound, compound,sealant.4. Significance and Use4.1 The rate of extrusion determined by this test
6、 may becorrelated with the rate of gunning of the compound.5. Apparatus5.1 Press-Flow Extrusion Rheometer constructed in accor-dance with Fig. 1.5.2 Air Supply and Pressure Gage, accurate to 6.9 kPa (1psi).5.3 Clamps and Stand to hold rheometer.5.4 Balance, accurate to 0.01 g.5.5 Stop Watch.5.6 Spat
7、ula (Steel).5.7 Weight-per-gallon Cup, capacity 83.2 cm3.6. Reagent6.1 Solvent, such as methyl ethyl ketone.7. Sampling7.1 The compound to be tested shall be taken from apreviously unopened container and thoroughly mixed beforeusing.8. Conditioning8.1 After thoroughly cleaning the press-flow rheomet
8、er withsolvent, condition the compound and the rheometer in thelaboratory for at least5hat236 2C (73.4 6 3.6F).9. Procedure9.1 Remove the orifice holder from the rheometer cylinderand hold the open end up, making sure that the follower plateremains inside.9.2 Fill the cylinder with compound, avoidin
9、g air pockets.Strike off the filled cylinder with a spatula and replace thebottom orifice cap. Connect the tube to an air supply and fix itto a support stand above the balance.9.3 Adjust the air pressure to 207 kPa (30 psi) and open theair valve. If the pressure drops, readjust to 207 kPa whileextru
10、sion is in progress. Close the air valve and discard thisextruded compound. The apparatus is now ready for testing.9.4 Open the air valve and start the stop watch simulta-neously. After extruding approximately 50 g of compound,close the air valve and stop the stop watch simultaneously.Weigh to the n
11、earest 0.01 g the amount of compound extruded.9.5 Calculate the seconds per gram by dividing the numberof seconds elapsed by the number of grams extruded, anddesignate this as value S.9.6 Convert the value S to seconds per millilitre afterdetermining the specific gravity of the compound using thewei
12、ght-per-gallon cup and Test Method D 1475.1This test method is under the jurisdiction ofASTM Committee C24 on BuildingSeals and Sealants and is the direct responsibility of Subcommittee C24.20 onGeneral Test Methods.Current edition approved Jan. 1, 2009. Published March 2009. Originallyapproved in 1
13、966. Last previous edition approved in 2003 as D 2452 03.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Cop
14、yright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.FIG. 1 Press-Flow Extrusion RheometerD 2452 03 (2009)2NOTE 1Since different compounds have different specific gravities,and the extrusion rate in terms of volume normally is of greater inte
15、restthan in terms of weight, the results shall be converted to terms of secondsper millilitre.10. Specific Gravity10.1 Weigh the weight-per-gallon cup accurately to 0.1 g.10.2 Remove the cover and fill to within 2.5 mm (0.1 in.) ofthe brim with compound.10.3 Carefully replace the cover so that air a
16、nd excessmaterial are expelled through the vent. Wipe the cover toremove surplus and reweigh.10.4 By subtraction, determine the weight (grams) of con-tents. The net weight of the sample in grams, divided by 10, isthe weight per gallon in pounds.11. Calculation11.1 Calculate the extrudability, E, in
17、seconds per millilitre,as follows:E 5 S 3 D (1)where:S = seconds per gram, andD = specific gravity = weight/gallon (in pounds) 3 0.12.12. Report12.1 Report the extrudability, in seconds per millilitre.13. Precision and Bias13.1 On the basis of a round-robin in which six laboratoriestested six sample
18、s covering a range of extrudability values, the“between-laboratories coefficient of variation was found to be16.7 %. Based on this value of the coefficient of variation, thefollowing criteria should be used for judging the acceptabilityof results at the 95 % confidence level:13.1.1 RepeatabilityNo d
19、ata at the present time.13.1.2 ReproducibilityTwo results obtained by operatorsin different laboratories should be considered suspect if theydiffer by more than 60 % of the mean value.14. Keywords14.1 caulking compounds; extrudability; gunnabilityASTM International takes no position respecting the v
20、alidity 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 such rights, are entirely their own responsibility.This standard is s
21、ubject 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 additional standardsand should be addressed to ASTM International Headq
22、uarters. 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 the ASTM Committee on Standards, at the address shown below.This stan
23、dard 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).D 2452 03 (2009)3
