ASTM_D_2453_-_15.pdf

Designation:D245315Standard 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 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 a laboratory procedure fordetermining the shrinkage of oil-and resin-base(Note)caulk-ing 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.NOTE1This 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 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 appro-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:caulking,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 determined,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 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 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,0.8 to 3.2 mm(132to18in.)thick;inside diameter,66.7 mm(258in.);and 12.7 mm(12in.)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(312in.)square by 16to 19 mm(58to34in.)thick.6.8 Steel Spatula or Putty Knife about 102 mm(4 in.)longand about 19 mm(34in.)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 under 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).DOI: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 Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 7.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 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 least 5 h at standard conditions.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 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 required 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 whilethe tool is rotated.P