1、Designation: D2453 15Standard Test Method forShrinkage and Tenacity of Oil- and Resin-Base CaulkingCompounds1This standard is issued under the fixed designation D2453; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of las
2、t 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 a laboratory procedure fordetermining the shrinkage of oil- and resin-base (Note) caulk-ing co
3、mpounds, 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 values
4、 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 app
5、ro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C717 Terminology of Building Seals and Sealants3. Terminology3.1 DefinitionsDefinitions of the following terms arefound in Terminology C717: caulki
6、ng, caulking compound,compound, cure, joint, standard conditions.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 de
7、termined, this samespecimen 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
8、of a joint when 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
9、 Cabinet or Room, capable of maintaining standardconditions for extended 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 in 0.1 mL.6.5 Brass Ring, metal
10、, 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 to312 in.) in diameter.6.7 Limestone Block, standard 89 mm (312 in.) square by 16to 19 mm (58 to34 in.) thick.6.8 S
11、teel 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 Distilled Water.1This method is un
12、der the jurisdiction of ASTM Committee C24 on BuildingSeals and Sealants and is the direct responsibility of Subcommittee C24.20 onGeneral Test Methods.Current edition approved June 1, 2015. Published July 2015. Originally approvedin 1966. Last previous edition approved in 2009 as D2453 03(2009). DO
13、I:10.1520/D2453-15.2For 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.Copyright ASTM International, 100 Barr Har
14、bor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States17. Sampling7.1 The compound to be tested shall be taken from apreviously unopened container. Remove the compound fromthe container and work with a putty knife to a homogeneousconsistency on a nonporous surface.8. Conditioning8.1
15、 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 least5hatstandard conditions.9. Procedure for Shrinkage Determination9.1 Place the brass ring on one of the ground-glass pl
16、ates.Determine the volume of the ring by filling it with distilledwater at standard conditions from a titrating buret. Pour thewater slowly from the buret into the ring so that there are no airbubbles visible when the glass cover plate is centered on top ofthe ring. Record the amount of water requir
17、ed to fill the ring tothe 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 contact with ring and stone (Fig. 1). The levelingtool should fit firmly against the inside surface of the ring whilet
18、he 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). Recordthe quantity of water needed to fill the ring (reading the buretto an accuracy of 0.03 mL) and designate the amo
19、unt 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 end of thisexposure period and after the specimen has cooled for 2 h atroom temperature, repeat the filling of the ring u
20、sing 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!# 3100 (1)where:Vr= volume of ring, mL,Vf= volume of water required to fill ring after 120 hexposure, andVi= volume of water required to fi
21、ll 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 the ringand lift the ring from the compound and the block. With theFIG. 1 Tool for Leveling Caulking Compound in the
22、 Shrinkage Test SpecimenFIG. 2 Stages in the Shrinkage Test ProcedureD2453 152stiff putty knife, loosen one half of the caulking pat from theblock. Place the putty knife under the loosened portion of thecompound and fold over 180 onto the remaining part of thecompound, return to the original positio
23、n, 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.12. Report12.1 ShrinkageReport the percent of volume shrinkage.12.2 TenacityReport as pass or fail; passage requires
24、 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 the amount of shrinkage,expressed in percent, by volume, was found to be 1.10. Basedon this value of the standard d
25、eviation, 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 ReproducibilityTwo results obtained by operatorsin different laboratories should be considered suspect if theydiffer by more than
26、 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 the participant laboratorieson the two samples tested.13.2.2 RepeatabilityNo data at the present time.14. Keywords14
27、.1 caulking compound; flexibility; shrinkageASTM 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 any such patent rights, and
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