Int. J. Advanced Structures & Geotechnical Engineering
ISSN 2319-5347, ISI Impact Factor: 0.763
VOLUME 03 NO. 02 APRIL 2014:
Title:
Study on reinforcement corrosion in high
performance concrete under pre-loading condition
Authors:
Abu Zakir Morshed, Hasan Ahmed Kazmee, Mohammad
Zahidul Islam
Abstract:
The mutual effects between subjection of
pre-loading and corrosion of reinforcing steel were
investigated. Three concrete beams of 1170 mm long x 100
mm wide x 150 mm high were used as test specimens. Two
of them were made of high performance concrete
incorporating fly ash and slag, while the other was
control specimens of 100% OPC as binder. The beams were
reinforced with a single Ø16-mm 60-grade bar and
subjected to four-point loading at a constant load level
of 80% of the average ultimate flexural strength. The
corrosion process was accelerated by employing 5% NaCl
solution. Galvanized current measurements were taken to
monitor the corrosion initiation. After corrosion had
initiated, an external current was applied to expedite
the corrosion propagation, and responsive voltages were
measured. Performance of the high performance concrete
was evaluated in terms of corrosion resistance. The
results suggested that influence of material
propositions should be considered in combination with
environmental aspects and service-load conditions.
Keywords:
Corrosion; galvanic current; supplementary
cementitious materials; pre-loading
Page No: 153-157