1、Designation: D 2453 03Standard Test Method forShrinkage and Tenacity of Oil- and Resin-Base CaulkingCompounds1This standard is issued under the fixed designation D 2453; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of l
2、ast revision. 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 a laboratory procedure fordetermining the shrinkage of oil- and resin-base (Note) caulk-ing
3、 compounds, as well as the evaluation of the tenacityproperty of such compounds. This test method is applicable toboth gun (Type I) and knife (Type II) grades.NOTE 1This is not a suitable test method for water-base products.1.2 The values stated in SI units are to be regarded as thestandard. The val
4、ues given in parentheses are for informationonly.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, if any, associated with its use. It is theresponsibility of the user of this standard to establish
5、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 Sealants23. Terminology3.1 DefinitionsDefinitions of the following terms arefound in Terminology C 717: c
6、aulking, caulking compound,compound, cure, joint.4. Summary of Test Method4.1 A14-in. layer of caulking compound is aged 120 h at 656 2C (149 6 3.6F) and its shrinkage is determined bycomparing its initial volume to the volume after the agingperiod.4.2 After the shrinkage has been determined, this s
7、amespecimen is also used to test tenacity by folding the agedmaterial 180 six times.5. Significance5.1 Shrinkage is a measure of the nonvolatile solids of anoil- or resin-base compound. A compound that exhibits exces-sive shrinkage may have a tendency to crack or shink from thesides of a joint when
8、in service.5.2 Tenacity is the measure of the flexibility of an oil- orresin-base caulking compound. Oil- or resin-base caulkingcompounds that cure excessively hard and do not remainflexible may fail prematurely because of the inability to absorbmovement.6. Apparatus and Materials6.1 Cabinet or Room
9、, capable of maintaining a temperatureof 23 6 2C (73.4 6 3.6F) at 50 6 5 % relative humidity forextended periods of time.6.2 Oven (convection-type), controlled at 65 6 2C (149 63.6F).6.3 Oven (convection- or blower-type), controlled at 104 62C (220 6 3.6F).6.4 Titrating Buret, 50-mL capacity, marked
10、 in 0.1 mL.6.5 Brass Ring, metal, 0.8 to 3.2 mm (132 to18 in.) thick;inside diameter, 66.7 mm (258 in.); and 12.7 mm (12 in.) wide,with ends of the ring ground flat.6.6 Cover Plates, ground glass, two, 76 to 89 mm (3 to312in.) in diameter.6.7 Limestone Block, standard 89 mm (312 in.) square by 16to
11、19 mm (58 to34 in.) thick.6.8 Steel Spatula or Putty Knife about 102 mm (4 in.) longand about 19 mm (34 in.) wide.6.9 Leveling Tool for spreading compound (Fig. 1).6.10 Knife, thin-pointed blade.6.11 Putty Knife, steel, stiff, about 102 mm (4 in.) long andabout 51 mm (2 in.) wide at the end.6.12 Dis
12、tilled Water.1This method is under the jurisdiction of ASTM Committee C24 on BuildingSeals and Sealants, and is the direct responsibility of Subcommittee C24.20 onGeneral Sealent Standards.Current edition approved May 10, 2003. Published June 2003. Originallyapproved in 1966. Last previous edition a
13、pproved in 1999 as D 2453 99.2Annual book of ASTM Standards, Vol 04.07.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7. Sampling7.1 The compound to be tested shall be taken from apreviously unopened container. Remove the compound f
14、romthe container and work with a putty knife to a homogeneousconsistency on a nonporous surface.8. Conditioning8.1 Condition limestone blocks in an oven at 104 6 2C(220 6 3.6F) for 24 h and then cool to room temperature.8.2 Condition the unopened cartridge or can of caulkingcompound for at least5hat
15、236 2C (73.4 6 3.6F).9. Procedure for Shrinkage Determination9.1 Place the brass ring on one of the ground-glass plates.Determine the volume of the ring by filling it with distilledwater at 23 6 2C (73.4 6 3.6F), from a titrating buret. Pourthe water slowly from the buret into the ring so that there
16、 areno air bubbles visible when the glass cover plate is centered ontop of the ring. Record the amount of water required to fill thering to the nearest 0.03 mL, as Vr.9.2 Center the ring on the limestone block. Spread a 6-mm(14-in.) layer of compound in the ring, using the leveling toolto form good
17、contact with ring and stone (Fig. 1). The levelingtool should fit firmly against the inside surface of the ring whilethe tool is rotated. Pour distilled water from the buret into thering until it is exactly filled (without air bubbles), as deter-mined by covering with a ground-glass plate (Fig. 2).
18、Recordthe quantity of water needed to fill the ring (reading the buretto an accuracy of 0.03 mL) and designate the amount as Vi.9.3 Pour out the water from the ring and place the specimen,at the same level as the temperature measuring device, in anoven set at 656 2C (149 6 3.6F) for 120 h. At the en
19、d of thisexposure period and after the specimen has cooled for2hatroom temperature, repeat the filling of the ring using the buretand record the volume of water used as Vf.10. Calculation10.1 Calculate the shrinkage, in volume percent, as follows:Shrinkage, % 5 Vf2 Vi!/Vr2 Vi!# 3 100 (1)where:Vr= vo
20、lume of ring, mL,Vf= volume of water required to fill ring after 120 hexposure, andVi= volume of water required to fill ring before ovenexposure.11. Procedure for Tenacity Determination11.1 After the shrinkage determination has been completed,run the point of the knife blade along the inside edge of
21、 the ringand lift the ring from the compound and the block. With thestiff putty knife, loosen one half of the caulking pat from theFIG. 1 Tool for Leveling Caulking Compound in the Shrinkage Test SpecimenFIG. 2 Stages in the Shrinkage Test ProcedureD2453032block. Place the putty knife under the loos
22、ened portion of thecompound and fold over 180 onto the remaining part of thecompound, return to the original position, and repeat theoperation until six folds have been made along the same line.Embrittlement or lack of tenacity is indicated by breaking orcracking of the caulking layer at the crease.
23、12. Report12.1 ShrinkageReport the percent of volume shrinkage.12.2 TenacityReport as pass or fail; passage requires aminimum of six folds.13. Precision and Bias13.1 ShrinkageOn the basis of a round robin in whicheight laboratories tested two samples, the “between-laboratories” standard deviation of
24、 the amount of shrinkage,expressed in percent, by volume, was found to be 1.10. Basedon this value of the standard deviation, the following criteriashould be used for judging the acceptability of results at the95 % confidence level:13.1.1 RepeatabilityNo data at the present time.13.1.2 Reproducibili
25、tyTwo results obtained by operatorsin different laboratories should be considered suspect if theydiffer by more than 3.8 percentage points.13.2 Tenacity:13.2.1 On the basis of a round robin in which eightlaboratories tested two samples in a “pass-fail” test, there wasa unanimous agreement among all
26、the participant laboratorieson the two samples tested.13.2.2 RepeatabilityNo data at the present time.14. Keywords14.1 caulking compound; flexibility; shrinkageASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this stan
27、dard. 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 be revie
28、wed 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 theresponsibl
29、e 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, 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).D2453033
