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.
Bond and Corrosion: Experimental Studies / Cesetti, Alessandro; Mancini, Giuseppe; Tondolo, Francesco (KEY ENGINEERING MATERIALS). - In: Concrete under Severe Conditions: Environment and Loading / Matteo Colombo, Marco di Prisco. - STAMPA. - Pfäffikon : Trans Tech Publications Ltd, 2016. - ISBN 978-3-03835-621-9. - pp. 84-92 [10.4028/www.scientific.net/KEM.711.84]
Bond and Corrosion: Experimental Studies
CESETTI, ALESSANDRO;MANCINI, GIUSEPPE;TONDOLO, FRANCESCO
2016
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.Pubblicazioni consigliate
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https://hdl.handle.net/11583/2650646
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