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Monitoring Rebar Corrosion Propagation Embedded in Concrete

As a means to assess achieving intended service life on marine exposed bridge structures, corrosion of steel reinforcement was monitored on selected laboratory specimens for several years and on other specimens for a few months.

Product Number: 51317--9094-SG
ISBN: 9094 2017 CP
Author: Francisco Presuel-Moreno
Publication Date: 2017
Industry: Highways & Bridges
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As a mean to assess achieving intended service life on marine exposed bridge structures the corrosion propagation stage was investigated. Corrosion of the steel reinforcement during the corrosion propagation was monitored on selected laboratory specimens for several years. The specimens were prepared with 2 inches of concrete cover and low water to cementitious (i.e. 0.41). Chloride was not present initially. An electric field was applied to drive the chlorides and reach the rebar depth until it exceeded the chloride threshold. Linear polarization tests have been monitored for over 3 years on eight specimens and for a shorter period (approx. six months) on six other specimens. The proposed study will assist in providing the Florida department of transportation with guidance as to how fast the corrosion rate will be at various chloride concentrations for rebars embedded in concrete. With these corrosion rate values it would be possible to obtain estimations on how long it would take before cracks appears

Key words: Concrete Cover, Corrosion Propagation Period, Corroding Length, fatigue

As a mean to assess achieving intended service life on marine exposed bridge structures the corrosion propagation stage was investigated. Corrosion of the steel reinforcement during the corrosion propagation was monitored on selected laboratory specimens for several years. The specimens were prepared with 2 inches of concrete cover and low water to cementitious (i.e. 0.41). Chloride was not present initially. An electric field was applied to drive the chlorides and reach the rebar depth until it exceeded the chloride threshold. Linear polarization tests have been monitored for over 3 years on eight specimens and for a shorter period (approx. six months) on six other specimens. The proposed study will assist in providing the Florida department of transportation with guidance as to how fast the corrosion rate will be at various chloride concentrations for rebars embedded in concrete. With these corrosion rate values it would be possible to obtain estimations on how long it would take before cracks appears

Key words: Concrete Cover, Corrosion Propagation Period, Corroding Length, fatigue

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