1、Designation: D 2452 03Standard 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 year of last revi
2、sion. 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 describes the laboratory procedure fordetermining the rate of extrusion of oil- and resin-base caulk-ing comp
3、ounds.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 thesafety concerns,
4、 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:C 717 Terminology of Building Seals and Seala
5、nts2D 1475 Test Method for Liquid Coatings, Inks, and RelatedProducts33. 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 may becorrelated with the
6、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 Spatula (Steel).5.7 Weight-per-
7、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 rheometer withsolvent, condition t
8、he 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, avoiding air pockets.Strike off th
9、e 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 whileextrusion is in progress. Close
10、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 nearest 0.01 g the amount of
11、 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 theweight-per-gallon cup and Test
12、 Method D 1475.1This test method is under the jurisdiction of ASTM Committee C24 on BuildingSeals and Sealants, and is the direct responsibility of Subcommittee C24.20 onGeneral Sealant Standards.Current edition approved May 10, 2003. Published June 2003. Originallyapproved in 1966. Last previous ed
13、ition approved in 1999 as D 2452 94 (1999)e1.2Annual Book of ASTM Standards, Vol 04.07.3Annual Book of ASTM Standards, Vol 06.01.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.FIG. 1 Press-Flow Extrusion RheometerD2452032NOTE 1Since
14、 different compounds have different specific gravities,and the extrusion rate in terms of volume normally is of greater interestthan 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
15、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 and 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 t
16、he sample in grams, divided by 10, isthe weight per gallon in pounds.11. Calculation11.1 Calculate the extrudability, E, in 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, i
17、n seconds per millilitre.13. Precision and Bias13.1 On the basis of a round-robin in which six laboratoriestested six samples 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, thefol
18、lowing criteria should be used for judging the acceptabilityof results at the 95 % confidence level:13.1.1 RepeatabilityNo data 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 mea
19、n value.14. Keywords14.1 caulking compounds; extrudability; gunnabilityASTM 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 expressly advised that determination of the validity of
20、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 revised, either reapproved or withdrawn. Your comments are
21、 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 attend. If you feel that your comments have not rece
22、ived 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).D2452033
