Thermoviscoelastic Analysis and Creep Testing of Ambient Temperature Cure Epoxies Used in Adhesive Anchor Applications

Thermoviscoelastic properties and creep response of two commercial ambient temperature cure epoxy structural adhesives were analyzed and compared. The adhesives were formulated by the same manufacturer and appeared to be chemically similar; however, one system contained accelerators to shorten its c...

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Bibliographic Details
Published in:Journal of materials in civil engineering 2010-10, Vol.22 (10), p.1039-1046
Main Authors: Chin, Joannie, Forster, Aaron, Ocel, Justin, Hartmann, Joseph, Fuchs, Paul, Hunston, Donald
Format: Article
Language:English
Subjects:
Adhesives
Applied sciences
Buildings. Public works
Exact sciences and technology
Materials
Plastics
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Summary:Thermoviscoelastic properties and creep response of two commercial ambient temperature cure epoxy structural adhesives were analyzed and compared. The adhesives were formulated by the same manufacturer and appeared to be chemically similar; however, one system contained accelerators to shorten its cure time. In the laboratory, dynamic mechanical temperature/frequency sweeps were performed on both systems to generate dynamic mechanical and creep compliance master curves using time-temperature superposition principles. Differences were observed in the dynamic mechanical properties of the two adhesive systems as well as in their calculated creep compliance, which have been attributed to differences in their curing agent(s) and accelerator(s). Full-scale creep tests were carried out on anchors installed in concrete slabs and subjected to sustained loads for 82 days. These results were in good agreement with the creep compliance estimated using time-temperature superposition, suggesting that dynamic mechanical testing can be a useful metrology for characterizing trends in creep behavior.
ISSN:0899-1561
1943-5533
DOI:10.1061/(ASCE)MT.1943-5533.0000108