Christopher C. White, Kar T. Tan, Donald L. Hunston
Predicting the service life of building joint sealants exposed to service environments in less than real times has been a need of the sealant community for many decades. Despite extensive research efforts have been made to design laboratory accelerated tests aimed to duplicate failure modes occurring in field exposures, little success have been achieved to date. Such durability information, however, is critical in differentiating products in the marketplace. In response to this urgent need, we have designed a laboratory based test methodology which used a systematic approach to study both independent and synergistic effects of various major aging factors on the durability of building joint sealants. Changes in modulus, stiffness and stress relaxation behaviors were assessed over time. Field exposure was also conducted in Gaithersburg, MD, using thermally-driven device with capabilities of monitoring changes in load and displacement experienced by sealants. The results obtained from both field and laboratory exposures are presented and discussed in this chapter.
Durability of Building Joint Sealants
Book Chapter Book Chapter in Federated Coatings Society Publication,
, Tan, K.
and Hunston, D.
Durability of Building Joint Sealants, Book Chapter Book Chapter in Federated Coatings Society Publication, , [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=860731
(Accessed June 6, 2023)