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.
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References
S Ebnesajjad (2008) Adhesive technology handbook. William Andrew Inc., Waltham
Basics of Post Installed Rebar Connections (2009) Hilti (China) Distribution Ltd. 649–713
Post-installed Anchor Technology, Specification & design manual, Powers USA: (800) 524-3244 or (914) 235-6300, www.powers.com
Accident Transportation Safety Board (2006) Ceiling Collapse in the Interstate 90 Connector Tunnel Boston, Massachusetts, Accident Report No.: NTSB/HAR-07/02& PB 2007-916203
Sorathia U, Lyon R, Gann RG, Gritzo L (1997) Materials and fire threat. Fire Technol 33(3):260–275. doi:10.1023/A:1015371806854
Chin J, Forster A, Clerici C, Hunston D (2010), Characterization of ambient temperature cure epoxies used in adhesive anchor applications. J Adhes 86:1041–1067
Zhang J-R, Huang H, Wu J, Song L, Guo X (2006) Study on bond-slip relationship for shear resistance of adhesive steel bar in metal tube. Struct Eng 22(3):72–75 (in Chinese)
Gesoğlu M, Güneyisi EM, Guneyisi E, Yılmaz ME, Mermerdas K (2014) Modeling and analysis of the shear capacity of adhesive anchors post-installed into uncracked concrete. Compos B 60:716–724
Wernik JM, Meguid SA (2014) On the mechanical characterization of carbon nanotube reinforced epoxy adhesives. Mater Des 59:19–32
Zhao Y, Yang M (2011) Pull-out behavior of an imperfectly bonded anchor system. Int J Rock Mech Min Sci 48:469–475
Çalışkan O, Yılmaz S, Kaplan H, Kıraç N (2013) Shear strength of epoxy anchors embedded into low strength concrete. Constr Build Mater 38:723–730
Yilmaz S, Özen MA, Yardim Y (2013) Tensile behavior of post-installed chemical anchors embedded to low strength concrete. Constr Build Mater 47:861–866
Liu C, Yu J, Lu Z, Wang K (2010) Experimental study on bond-slip behavior of post installed rebar at high temperature. J TongJi Univ (Natural science) 38(11):1579–1585
Li Y (2013) Experimental study on post-installed rebar connection under high-temperature and fire-resistance design method. Bachelor Degree Thesis, TongJi University in China (in Chinese)
Hilado CJ (1973) An overview of the fire behavior of polymers. Fire Technol 9(3):198–208. doi:10.1007/BF02624777
Chowdhury EU, Eedson R, Bisby LA, Green MF, Benichou N (2011) Mechanical characterization of fiber reinforced polymers materials at high temperature. Fire Technol 47(4):1063–1080. doi:10.1007/s10694-009-0116-6
Al-Safy R, Al-Mahaidi R, Simon GP, Habsuda J (2012) Experimental investigation on the thermal and mechanical properties of nanoclay-modified adhesives used for bonding CFRP to concrete substrates. Constr Build Mater 28:769–778
Yu B, Kodur VKR (2014) Effect of high temperature on bond strength of near-surface mounted FRP reinforcement. Compos Struct 110:88–97
ACI355.2-01(2001) Evaluating the performance of post-installed mechanical anchors in concrete, ACI Provisional Standard
EN 1992-1-1 (2004) Eurocode 2: design of concrete structures—part 1-1: general rules and rules for buildings, European Standard
EN 1992-1-2 (2004) Eurocode 2: design of concrete structures—part 1-2: general rules-structural fire design, European Standard
ASTM C881 (2013) Standard specification for epoxy-resin-base bonding systems for concrete. ASTM International, West Conshohocken
ETAG2001 (2001) European Techniques of Anchor Guideline, European Standard
GB50367-2006 (2006) Design code for strengthening concrete structure. China Building Industry Press, Beijing
GB/T 19466.2-2004 (2004) Plastics-differential scanning calorimetry (DSC)—Part 2: determination of glass transition temperature, Published by General Administration of Quality Supervision, Inspection and Quarantine and Standardization Technology Committee of the People’s Republic of China, reference by ISO 11357-2: 1999, IDT
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This research supported from The National Science Foundation for Post-doctoral Scientists of China 2014M551451, The State Key Laboratory for Strength and Vibration of Mechanical Structures Open Fund SV2014-KF-17 and The Natural Science Foundation of China 51350110234, which are gratefully acknowledged.
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Zhang, Y., Lou, Gb., Chen, Kp. et al. Residual Strength of Organic Anchorage Adhesive for Post-installed Rebar at Elevated Temperatures and After Heating. Fire Technol 52, 877–895 (2016). https://doi.org/10.1007/s10694-015-0510-1
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DOI: https://doi.org/10.1007/s10694-015-0510-1