ASTM C1735-17

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

SIGNIFICANCE AND USE
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.
SCOPE
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 the standard. The values in parentheses are for information only.  
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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Dec-2016
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: C24 - Building Seals and Sealants
• Drafting Committee: C24.20 - General Test Methods

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C1735 − 17
Standard Test Method for
Measuring the Time Dependent Modulus of Sealants Using
1
Stress Relaxation
This standard is issued under the fixed designation C1735; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.1 For definitions of terms used in this test method, refer
to Terminologies E631 and C717.
1.1 This test method covers a procedure for measuring the
time dependence of modulus in elastomeric joint sealants in a
4. Summary of Test Method
test specimen configuration described in Test Method C719.
These sealant materials are typified by highly filled rubber
4.1 This test method consists of two loading cycles where
materials. Any Mullins effect is first assessed and mitigated in
strain is increased froma0%toa user-defined maximum
two loading-unloading cycles. Time dependence of modulus in
strain and one stress relaxation procedure at a strain no greater
2
materials is then determined using a stress relaxation proce-
than ⁄3 of the user-defined maximum strain. A schematic
dure.
diagram of this test strain history is shown in Fig. 1.
1.2 The values stated in SI units are to be regarded as the
4.2 The motivation for the two loading-unloading cycles is
standard. The values in parentheses are for information only.
to assess if any Mullins effect is present and to mitigate any of
this effect in the subsequent stress relaxation test. As long as
1.3 This standard does not purport to address all of the
the maximum strain achieved during the first deformation is
safety concerns, if any, associated with its use. It is the
not exceeded, however, all subsequent loadings follow the
responsibility of the user of this standard to establish appro-
same stress-strain curve.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
4.3 Stress relaxation procedure is based on a sudden impo-
sition of either a tensile or compressive strain on the test
2. Referenced Documents
2
specimen at a value of no more than ⁄3 of the maximum strain
2
2.1 ASTM Standards:
and the measurement of the load required to maintain this
C717 Terminology of Building Seals and Sealants
tensile or compressive strain as a function of time.
C719 Test Method for Adhesion and Cohesion of Elasto-
4.4 The conversion of load relaxation values to apparent
meric Joint Sealants Under Cyclic Movement (Hockman
modulus and fractional change in apparent modulus is accom-
Cycle)
plished by inputting information about the specimen geometry
E4 Practices for Force Verification of Testing Machines
andtheamountofdeformationintoanequationthatisbasedon
E177 Practice for Use of the Terms Precision and Bias in
the statistical theory of rubber-like elasticity.
ASTM Test Methods
E631 Terminology of Building Constructions
5. Significance and Use
E691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method 5.1 The intent of this test method is to determine the time
dependence of modulus in building joint sealants using two
3. Terminology
loading-unloading cycles to identify and mitigate any Mullins
effect, and followed by a stress relaxation procedure to
3.1 Definitions:
determine the time dependent modulus.
5.2 This test method has found applications in screening the
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
performance of building joint sealants since the modulus is one
Seals and Sealants and is the direct responsibility of Subcommittee C24.20 on
General Test Methods.
indicator of the ability of elastomeric building sealant to
Current edition approved Jan. 1, 2017. Published February 2017. Originally
withstand environmental induced movements.
approved in 2011 as C1735-11. Last previous edition C1735-11. DOI: 10.1520/
C1735-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 6. Apparatus
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
6.1 Testing Machine—Any testing machine in compliance
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. with Practices E4, capable of producing a constant crosshead
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1735 − 17
The value of t is 20 s and t is typically 2000 s.
0 1
FIG. 1 Strain History Used for Two Loading-Unloading Cycles and a Stress Relaxation Measurement
displacement rate in displacement control and equipped with 7.3 Where use of primer is recommended by the seala
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C1735 − 11 C1735 − 17
Standard Test Method for
Measuring the Time Dependent Modulus of Sealants Using
1
Stress Relaxation
This standard is issued under the fixed designation C1735; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
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 the standard. The values in parentheses are for information only.
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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
C717 Terminology of Building Seals and Sealants
C719 Test Method for Adhesion and Cohesion of Elastomeric Joint Sealants Under Cyclic Movement (Hockman Cycle)
E4 Practices for Force Verification of Testing Machines
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E631 Terminology of Building Constructions
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this test method, refer to Terminologies E631 and C717.
4. Summary of Test Method
4.1 This test method consists of two loading cycles where strain is increased from a 0 % to a user-defined maximum strain and
2
one stress relaxation procedure at a strain no greater than ⁄3 of the user-defined maximum strain. A schematic diagram of this test
strain history is shown in Fig. 1.
4.2 The motivation for the two loading-unloading cycles is to assess if any Mullins effect is present and to mitigate any of this
effect in the subsequent stress relaxation test. As long as the maximum strain achieved during the first deformation is not exceeded,
however, all subsequent loadings follow the same stress-strain curve.
4.3 Stress relaxation procedure is based on a sudden imposition of either a tensile or compressive strain on the test specimen
2
at a value of no more than ⁄3 of the maximum strain and the measurement of the load required to maintain this tensile or
compressive strain as a function of time.
4.4 The conversion of load relaxation values to apparent modulus and fractional change in apparent modulus is accomplished
by inputting information about the specimen geometry and the amount of deformation into an equation that is based on the
statistical theory of rubber-like elasticity.
1
This test method is under the jurisdiction of ASTM Committee C24 on Building Seals and Sealants and is the direct responsibility of Subcommittee C24.20 on General
Test Methods.
Current edition approved Aug. 15, 2011Jan. 1, 2017. Published October 2011February 2017. DOI: 10.1520/C1735-11.Originally approved in 2011 as C1735-11. Last
previous edition C1735-11. DOI: 10.1520/C1735-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1735 − 17
The value of t is 20 s and t is typically 2000 s.
0 1
FIG. 1 Strain History Used for Two Loading-Unloading Cycles and a Stress Relaxation Measurement
5. Significance and Use
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 modul
...