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022			_a0889-3241
100			_aBen Wang _9881081
100			_aAbdeldjelil Belarbi _9881082
100			_aMina Dawood _9881083
100			_aBora Gencturk _9881084
245			_aCorrosion Behavior of Conventional and Corrosion-Resistant Steel Reinforcements in High-Performance and Ultra-High-Performance Concrete
300			_a141-151 p
520			_aThis paper presents the findings of an experimental study on the corrosion performance of both conventional and corrosionresistant steel reinforcements in normal-strength concrete (NC), high-performance concrete (HPC), and ultra-high-performance concrete (UHPC) columns in an accelerated corrosion-inducing environment for up to 24 months. Half-cell potential (HCP), linear polarization resistance (LPR), and electrochemical impedance spectroscopy (EIS) methods were used to assess the corrosion activities and corrosion rates. The reinforcement mass losses were directly measured from the specimens and compared to the results from electrochemical corrosion rate measurements. It was concluded that UHPC completely prevents corrosion of reinforcement embedded inside, while HPC offers higher protection than NC in the experimental period. Based on electrochemical measurements, the average corrosion rate of mild steel and high-chromium steel reinforcement in NC in 24 months were, respectively, 6.6 and 2.8 times that of the same reinforcements in HPC. In addition, corrosion-resistant steel reinforcements including epoxycoated reinforcing bar, high-chromium steel reinforcing bar, and stainless-steel reinforcing bar showed excellent resistance to corrosion compared to conventional mild steel reinforcement. There was no active corrosion observed for epoxy-coated and stainless steel reinforcements during the 24 months of the accelerated aging; the average corrosion rateS of high-chromium steel was 50% of that of mild steel in NC based on the electrochemical corrosion measurements; and the average mass loss of high-chromium steel was 47% and 75% of that of mild steel in NC and HPC, respectively. The results also showed that the LPR method might slightly overestimate the corrosion rate. Finally, pitting corrosion was found to be the dominant type of corrosion in both mild and high-chromium steel reinforcements in NC and HPC columns.
650			_aCorrosion
650			_aHigh-Performance Concrete (HPC) _9169732
650			_aMass Loss _9881085
650			_aSteel Reinforcement _9171049
650			_aUltra-High-Performance Concrte (UHPC) _9881086
773	0		_tACI Materials Journal _x0889325X _dDetroit, U.S.A : American Concrete Institute
856			_uDOI:10.14359/51739153
942			_2ddc _n0 _cART _o14993 _pMr. Muhammad Rafique Al Haj Rajab Ali (Late)
999			_c815007 _d815007