ASTM C1815-17
(Practice)Standard Practice for Periodically Measuring and Monitoring Sealant Dimensions to Stability Following a Period of Compression or Tension
Standard Practice for Periodically Measuring and Monitoring Sealant Dimensions to Stability Following a Period of Compression or Tension
SIGNIFICANCE AND USE
5.1 Many sealants have been observed to dimensionally change following a period of compression or tension, such as occurs during exposure in accordance with Practice C1589. It has been shown that for some sealants, increasing exposure to weathering increases the time required for dimensional stability and decreases the magnitude of dimensional change. Dimensional stability and knowledge of the stable sealant dimensions are critical to the accurate measurement of the sealant’s modulus by a test such as Test Method C1735.
5.2 This practice will find application in improving the accuracy of the modulus determined by a standard such as Test Method C1735 by using the accurate dimensions determined by this practice after stability is attained.
SCOPE
1.1 This practice covers a procedure for measuring and monitoring the physical dimensions of an elastomeric joint sealant in a test specimen configuration described in Test Method C719 following a period of compression or tension. These sealant materials are typically highly filled elastic materials. The dimensional change of these sealant materials is determined by measuring the dimensions at specific intervals over a period of time.
1.2 The values stated in SI units are to be regarded as 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, 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.
General Information
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: C1815 − 17
Standard Practice for
Periodically Measuring and Monitoring Sealant Dimensions
1
to Stability Following a Period of Compression or Tension
This standard is issued under the fixed designation C1815; 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 practice, refer to
Terminologies E631 and C717.
1.1 This practice covers a procedure for measuring and
monitoring the physical dimensions of an elastomeric joint
4. Summary of Practice
sealant in a test specimen configuration described in Test
4.1 This practice consists of monitoring the dimensional
Method C719 following a period of compression or tension.
These sealant materials are typically highly filled elastic change of a sealant for a period of time required to establish
dimensional stability.
materials. The dimensional change of these sealant materials is
determined by measuring the dimensions at specific intervals
4.2 The motivation for this practice is to monitor the
over a period of time.
dimensions of a sealant at any time, but especially after a
1.2 The values stated in SI units are to be regarded as period of extended tension or compression to establish the
stable dimensions of that sealant. The latter is used in appli-
standard. The values in parentheses are for information only.
cation of a standard, such as Test Method C1735, by using the
1.3 This standard does not purport to address all of the
accurate dimensions determined by this practice after dimen-
safety concerns, if any, associated with its use. It is the
sional stability is attained.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter- 4.3 This practice will enable determination of the stable
mine the applicability of regulatory limitations prior to use. dimensions of a sealant. It will also allow the reporting of the
1.4 This international standard was developed in accor- time scale over which the sealant dimensions are changing.
dance with internationally recognized principles on standard-
5. Significance and Use
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
5.1 Many sealants have been observed to dimensionally
mendations issued by the World Trade Organization Technical
change following a period of compression or tension, such as
Barriers to Trade (TBT) Committee.
occurs during exposure in accordance with Practice C1589.It
has been shown that for some sealants, increasing exposure to
2. Referenced Documents
weathering increases the time required for dimensional stabil-
2.1 ASTM Standards:
ity and decreases the magnitude of dimensional change.
C717 Terminology of Building Seals and Sealants
Dimensional stability and knowledge of the stable sealant
C719 Test Method for Adhesion and Cohesion of Elasto-
dimensions are critical to the accurate measurement of the
meric Joint Sealants Under Cyclic Movement (Hockman
sealant’s modulus by a test such as Test Method C1735.
Cycle)
5.2 This practice will find application in improving the
C1589 Practice for Outdoor Weathering of Construction
accuracy of the modulus determined by a standard such as Test
Seals and Sealants
Method C1735 by using the accurate dimensions determined
C1735 Test Method for Measuring the Time Dependent
by this practice after stability is attained.
Modulus of Sealants Using Stress Relaxation
E631 Terminology of Building Constructions
6. Apparatus
3. Terminology
6.1 Dimensional Measuring Tool—A micrometer, such as
3.1 Definitions:
digital calipers, capable of measuring the dimensions of
aluminum substrate and sealant to an accuracy of at least
1
This practice is under the jurisdiction of ASTM Committee C24 on Building
60.05 mm (60.002 in.), is required.An accurate measurement
Seals and Sealants and is the direct responsibility of Subcommittee C24.20 on
of the geometry is critical. For example, for a 12.5 mm thick
General Test Methods.
sealant that will experience a 15 % strain when tested in
Current edition approved Nov. 1, 2017. Published November 2017. DOI:
10.1520/C1815-17. accordance with Test Method C1735, the total deflection is
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C1815 − 17
1.875 mm. For measurement accuracy of3%of this value, the metal supports of the sealant when the dimensional
measurement of 60.05 mm is required. measuring tool is vertically aligned with the height
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.