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Title: A Test Method for Monitoring Modulus Changes during Durability Tests on Building Joint Sealants

Source: Journal of ASTM International, Volume 9, Number 2; 2012

Author(s)White, Christopher C.; Hunston, Donald L.; Tan, Kar Tean; Schueneman, Gregory T.

Publication Year: 2012  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4707-1A

Abstract: The durability of building joint sealants is generally assessed using a descriptive methodology involving visual inspection of exposed specimens for defects. It is widely known that this methodology has inherent limitations, including that the results are qualitative. A new test method is proposed that provides more fundamental and quantitative information about changes occurring in a sealant during durability testing. This test method utilizes a stress relaxation experiment to evaluate the non-linear viscoelastic behavior of sealants. In particular, changes in the time dependence of the apparent modulus can be observed and related to molecular changes in the sealant. Such changes often precede the formation of cracks and the ultimate failure of the sealant. This paper compares results obtained from the new test method and the currently used descriptive methodology.

Keywords: Sealant; durability; ASTM C719; ASTM C1519; Stress relaxation; modulus

Publication Review Process: Formally Refereed

File size: 1,313 kb(s)

Date posted: 09/18/2012

This publication is also viewable on Treesearch:  view
RITS Product ID: 61450
Current FPL Scientist associated with this product
Schueneman, Gregory
Supervisory Research Materials Engineer

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