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ASTM C1735-17(2021)

Current Reaffirmation

Standard Test Method for Measuring the Time Dependent Modulus of Sealants Using Stress Relaxation

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1.1 This test method covers a procedure for measuring the time dependence of modulus in elastomeric joint sealants in a test specimen configuration described in Test Method C719. These sealant materials are typified by highly filled rubber materials. Any Mullins effect is first assessed and mitigated in two loading-unloading cycles. Time dependence of modulus in materials is then determined using a stress relaxation procedure.

1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


5.1 The intent of this test method is to determine the time dependence of modulus in building joint sealants using two loading-unloading cycles to identify and mitigate any Mullins effect, and followed by a stress relaxation procedure to determine the time dependent modulus.

5.2 This test method has found applications in screening the performance of building joint sealants since the modulus is one indicator of the ability of elastomeric building sealant to withstand environmental induced movements.

SDO ASTM: ASTM International
Document Number C1735
Publication Date May 1, 2021
Language en - English
Page Count 4
Revision Level 17(2021)
Supercedes
Committee C24.20
Publish Date Document Id Type View
Jan. 1, 2017 C1735-17 Revision
Aug. 15, 2011 C1735-11 Revision
May 1, 2021 C1735-17R21 Reaffirmation