NDLI: Residual Strength of Organic Anchorage Adhesive for Post-installed Rebar at Elevated Temperatures and After Heating

Content Provider	Springer Nature Link
Author	Zhang, Yu Lou, Guo biao Chen, Ke peng Li, Guo qiang
Copyright Year	2015
Abstract	A series of pull-out tests for anchorage adhesives were carried out at elevated temperatures of 25°C, 60°C, 100°C, 160°C, 260°C and after heating. The heating process followed a fixed curve. Three commonly used anchorage adhesives were adopted and five specimens were tested at each temperature condition. The residual strengths of the connection in and after heating were analyzed and compared. The force-slip relationships of the adhesives at elevated temperatures and after heating indicated that the bond strength decreased remarkably with the increase of temperature but recovered slightly after heating. The bond properties and failure mechanism between the adhesive bar and the outside tube are discussed. A three-stage and four-stage models for force-slip relationship were obtained by curve-fitting. The bond strength variations with the increasing of the deformation at the elevated temperature and after heating were contrasted. The results shown that bond strength of anchorage adhesive is strongly dependent on temperature and it decreases rapidly with rising temperature, the residual bearing capacity of anchorage adhesives is around or lowers to 10% when the temperature exceeds 260°C and the vinylester adhesive is more sensitive than epoxy adhesive to temperature effects. The result also shown that the glass transition temperature was a useful metrology for behaviors of adhesive after heating and it can also be used to determine the upper limit temperature for continuous application.
Starting Page	877
Ending Page	895
Page Count	19
File Format	PDF
ISSN	00152684
Journal	Fire Technology
Volume Number	52
Issue Number	3
e-ISSN	15728099
Language	English
Publisher	Springer US
Publisher Date	2015-07-16
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Anchorage adhesive Bond strength Residual bearing capacity Elevated temperature After heating Civil Engineering Mechanics Characterization and Evaluation of Materials Physics
Content Type	Text
Resource Type	Article
Subject	Materials Science Safety, Risk, Reliability and Quality

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