ASTM_C_711_-_14.pdf

Designation:C71114Standard Test Method forLow-Temperature Flexibility and Tenacity of One-Part,Elastomeric,Solvent-Release Type Sealants1This standard is issued under the fixed designation C711;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 covers determination of the low-temperature flexibility and tenacity of one-part,elastomeric,solvent-release type sealants after cyclic high-and low-temperature aging.1.2 The subcommittee with jurisdiction is not aware of anysimilar ISO standard.1.3 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered 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 DefinitionsRefer to Terminology C717 for definitionsof the following terms used in this Test Method:elastomer,elastomeric,joint,sealant,solvent-release sealant,standardconditions.4.Significance and Use4.1 This test method is not intended to simulate an actualuse condition but it will give some indication of the elastomericproperties or flexibility of a building joint sealant at lowtemperature.It can serve to differentiate between elastomer-based sealants and sealants based on nonelastic binders that canharden or embrittle on aging and crack or lose adhesion whenflexed at low temperature.In addition,it can aid in identifyingsealants that have poor flexibility because they are overex-tended and contain a very low level of elastomeric binder aswell as those sealants having binders that will embrittle at lowtemperature.5.Apparatus5.1 Aluminum Panels,3,thin,approximately 3 in.(76 mm)wide by 5 in.(127 mm)long by 0.012 in.(0.30 mm)thick.5.2 Spatula,steel,with thin knife edge.5.3 Template,rectangular,of steel or brass,18in.(3.2 mm)high,1 by 334in.(25 by 95 mm)inside and approximately 2by 434in.(51 by 121 mm)outside.5.4 Oven,forced-draft type,having a temperature controlledat 158 6 3.6F(70 6 2C).5.5 Freezer Chest or Cold Box,having a controlled tem-perature of 10 6 5F(23 6 3C).5.6 Mandrel or Rod,with a diameter of14in.(6.4 mm),with a suitable holder or rack to support it.5.7 Methyl Ethyl Ketone,or similar solvent.6.Sampling6.1 Take the test specimen from a previously unopenedcontainer as received from the sealant manufacturer.7.Test Specimens7.1 Prepare three test specimens as follows:7.1.1 Condition the sealant sample in the original closedcontainer for at least 24 h at standard conditions.7.1.2 Thoroughly clean template and aluminum panels withsolvent.7.1.3 Center the template on the aluminum panel andcarefully fill it with compound,avoiding air pockets.Strike offthe surface of the compound flat to a uniform18-in.(3.2-mm)thickness.7.1.4 With the thin knife edge of the spatula,cut all aroundthe outside edge of the compound and lift the template straightup and off leaving the formed sealant on the plate.1This test method is under the jurisdiction ofASTM Committee C24 on BuildingSeals and Sealantsand is the direct responsibility of Subcommittee C24.20 onGeneral Test Methods.Current edition approved July 1,2014.Published August 2014.Originallyapproved in 1972.Last previous edition approved in 2009 as C711 03(2009).DOI:10.1520/C0711-14.2For 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 8.Conditioning8.1 Condition the specimens for at least 24 h at standardconditions.9.Procedure9.1 Expose the conditioned specimens three times to thefollowing temperature cycle:16 h at 15863.6F7062C!(1)8 h at2 1065F22363C!9.2 At the end of the third cycle,while it is in the freezerat 10F(23C)bend the panel through 180 over the14-in.(6.4-mm)diameter mandrel with the sealant side uppermost.Perform the bend in not less than 1 s and not more than 1.5 s.(a)Complete Cracking and Adhesive Failure(b)Severe Cracking(c)No Cracking or Adhesive FailureFIG.1 Low-Temperature Flexibility(Tenacity)C711 142 Immediately after bending examine the sealant for cracking,separation,delamination,and adhesive failure.Minor surfacecrazing or hairline cracks and minor edge cracking may beignored.10.Report10.1 Report any deep cracking,separat