000			01784nab a2200181 4500
005			20260520000938.0
008			260224s2010 xxu
245	0	0	_aProtocol for projecting time-to-corrosion of reinforcing steel in concrete exposed to chlorides
260			_a _b _cago. 2010
270			_a10/08/2010 ; 10/08/2010
300			_a10 p. ; 086002
520			_aTranscripción del resumen del autor. A protocol is described whereby time-to-corrosion, Ti, of reinforcing steel in concrete exposed to chlorides was calculated as a distributed, rather than discrete, parameter. The method consists of inputting (1) an average value for surface [Cl-] and the effective diffusion coefficient, (2) the mean and standard deviation of concrete cover over the reinforcement, and (3) a distribution function for the critical Cl- threshold concentration to initiate corrosion, CT, based upon values previously reported. The calculation result is a cumulative distribution function (CDF) plot of Ti. Example analyses were performed based upon a range of design and material property values of the above parameters for both past and representative, present-day bridge decks and marine bridge substructures. Results for corrosion-resistant reinforcement are compared with those for black bar. It is proposed that reinforced concrete durability should be characterized not simply in terms of the time at which corrosion initiates for a small percentage of the reinforcement, as is normally done, but also by the rate at which active corrosion subsequently begins for the remaining, uncorroded reinforcement. Implications of such an approach are discussed.
581			_a8
773	0		_tCorrosion _g66
942			_cARTICULO
100	1		_aHartt, W.H. _934170
999			_c175898 _d175898