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 performing dimensional measurements at specific times over a period of time until the sealant dimensions are determined to be no longer changing. 1.2 Units--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.
Dimensional stability and knowledge of the dimensions of a sealant is critical to accurate measurement of its modulus by a test method such as ASTM C1735-11. Many sealants have been observed to change dimensionally after being subjected to a period of compression or tension. It is only after they stop changing dimension that test methods such as ASTM C1735 can be preformed.
Keywordssealant; compression; tension; recovery; dimensional stability
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top