Bond and Corrosion: Experimental Studies

Abstract:

Bond between steel and concrete plays an important role in the structural behaviour of reinforced concrete structures. In the present paper, bond tests on r.c. specimens in presence of corrosion are performed in order to evaluate the effect of corrosion on bond mechanism. The results of the tests on concrete specimens with RILEM type shape, reinforced with ribbed steel bars of 12 and 16 mm of diameter, with and without confinement, in presence of an increasing level of corrosion up to 20%, are presented. An electrochemical procedure using a current density of 200 µA/cm² is employed to produce corrosion. The test results show the effect of oxidation of the reinforcement at the interface with concrete and consequent surface cracking, the change of performance in terms of bond and the change of failure mechanism.

• Periodical: Key Engineering Materials (Volume 711)
• Pages: 84-92
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.711.84
• Online since: September 2016
• Authors: Alessandro Cesetti*, Giuseppe Mancini, Francesco Tondolo
• Keywords: Bond, Confinement, Corrosion, Cracks, Pull-Out

References

[1] J. Rodríguez, L. M. Ortega and A. M. García, Assessment of structural elements with corroded reinforcement, in Corrosion and corrosion protection of Steel in Concrete, Sheffield, (1994).

[2] L. Giordano, G. Mancini and F. Tondolo, Reinforced Concrete Members Subjected to Cyclic Tension and Corrosion, Journal of Advanced Concrete Technology, vol. 9, no. 3, pp.277-285, (2011).

DOI: 10.3151/jact.9.277

[3] Fédération internationale du béton (fib), MC2012 fib model code, Lausanne: Ernst & Sohn, (2012).

[4] G. Mancini and F. Tondolo, Effect of bond degradation due to corrosion - A literature survey, Structural Concrete, vol. 15, no. 3, pp.408-418, (2014).

DOI: 10.1002/suco.201300009

[5] G. Mancini, D. Sabia, E. Pettinato and F. Tondolo, Pull-out tests in presence of high level of corrosion, in 4th Internation Symposium on Life-Cycle Civil Engineering, Tokyo, (2014).

DOI: 10.1201/b17618-316

[6] Duracrete, Modelling of Degradation, Gouda, (1998).

[7] ASTM G1-03, Standard practice for preparing, cleanind and evaluating corrosion test specimens, (2003).

[8] RILEM, Reccomendations for the Testing and Use of Constructions Materials, (1994).

[9] F. Tondolo, Bond behaviour with reinforcement corrosion, Constrution and Building Materials, vol. 93, pp.926-932, (2015).

DOI: 10.1016/j.conbuildmat.2015.05.067

[10] A. Cesetti, G. Mancini and F. Tondolo, Pull-out tests on r. c. corroded specimens, in International Conference on Concrete Repair, Rehabilitation and Retrofitting, Leipzig, (2015).

DOI: 10.1201/b18972-18