Papers by George Diamantogiannis
Journal of Materials in Civil Engineering, 2015
The present study examines the mechanical behavior and corrosion resistance in dual phase B500c r... more The present study examines the mechanical behavior and corrosion resistance in dual phase B500c reinforced steel used in concrete structures, before and after applying a layer of aluminum coating in intense corrosion environment. The aluminum layer was applied on the steel bars via thermal process with a flame spray gun and an average layer of 100 μm was created. The 90-day exposure corrosion tests performed in laboratory salt spray environment resulted in 0.29% mass loss of the specimen with aluminum coating while the noncoated specimen (bare) presented a mass loss of 13.5%. Similarly, the mechanical properties in tensile testing remained stable in all cases during different exposure times in contrast to bare specimens in which the strength properties followed mass loss ratio reduction while a dramatic reduction in ductility properties was also noticed. Roughness measurements were also performed in the reinforced steel, either with aluminum coating or without aluminum coating. The effects on friction coefficient and the wear rate were estimated using the weighting method, and the relevant results are presented.
Journal of Materials in Civil Engineering, 2016
AbstractThis experimental study examined the mechanical behavior in three types of reinforced con... more AbstractThis experimental study examined the mechanical behavior in three types of reinforced concrete steel. An evaluation of the mechanical behavior in dual-phase steels B400C, B450C, and B500B of high and medium ductility class, with a 16 mm nominal diameter, was conducted before and after exposure in a laboratory salt spray environment. The results of all mechanical tensile tests were compared and combined with the results of scanning electron microscope (SEM) and energy dispersive X-ray (EDX) analysis and consequently led to the following findings: The reduction in strength properties in the precorroded specimens was almost equivalent to the mass loss, which meets the demands set by Eurocode 2 (EC2) for safe structures. However, the drop in ductility properties, expressed as the deformation at maximum strength, is below the minimum limits. The findings also suggest that the degradation in the mechanical performance of steel cannot be attributed to a specific mechanism, but it appears to be the result...
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Papers by George Diamantogiannis