Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 140, Issue -, Pages 552-561Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2017.02.063
Keywords
Adhesive; Bridge construction; Cold-curing; Cross-link; Density; Epoxy; Physical aging
Categories
Funding
- Swiss Federal Roads Office (FEDRO) [AGB 2012/012]
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The effect of physical aging and continuation of curing on the physical and mechanical properties of a commercial cold-curing structural epoxy adhesive used in bridge construction has been investigated during the first year. Since adhesive bridge joints are sealed, only dry conditions were taken into account. Predominant physical aging in the earlier age and predominant curing in the later age affected the physical and mechanical properties. The E-modulus exhibited a maximum in the earlier age due to a maximum mass density caused by physical aging. In the later age, when curing became predominant, mass density and thus the E-modulus decreased while the cross-link density increased. After the first week, the E-modulus development became independent of the curing conditions. Tensile strength and failure strain depended mainly on the cross-link density and their development was thus influenced by the curing conditions but delayed in the earlier age due to physical aging. (C) 2017 Elsevier Ltd. All rights reserved.
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