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Details

Neutralization of Chloride in Concrete.

PB255309

Publication Date	1975
Personal Author	Lankard, D. R.; Slater, J. E.; Hedden, W. A.; Niesz, D. E.
Page Count	146
Abstract	This study was concerned with one solution to the problem of deterioration of bridge decks due to corrosion of reinforcing steel caused by chloride from deicing salts. Flushing of salts by application of water to the underside of the concrete and electrochemical removal of the chlorides were investigated. Flushing was found to be ineffective and work on it was abandoned early. However, the electrochemical removal technique showed promise of success first in the laboratory and later in a small scale field trial. In the latter chloride present at the level of the top rebar mat was reduced to below the concentration that is known to cause corrosion in 24 hours of treatment, and active corrosion of the steel that was going on was completely stopped.
Keywords	Bridge decks Deicers Corrosion prevention Electrochemical cleaning Reinforced concrete Reinforcing steels Chlorides Washing Laboratory tests Field tests
Source Agency	Federal Highway Administration
NTIS Subject Category	50A - Highway Engineering 50C - Construction Equipment, Materials, & Supplies 71G - Corrosion & Corrosion Inhibition
Corporate Authors	Battelle Columbus Labs., Ohio.; Federal Highway Administration, Washington, D.C.
Document Type	Technical Report
Title Note	Final rept.
NTIS Issue Number	197621
Contract Number	DOT-FH-11-8133

Neutralization of Chloride in Concrete.

Neutralization of Chloride in Concrete.
PB255309

Publication Date	1975
Personal Author	Lankard, D. R.; Slater, J. E.; Hedden, W. A.; Niesz, D. E.
Page Count	146
Abstract	This study was concerned with one solution to the problem of deterioration of bridge decks due to corrosion of reinforcing steel caused by chloride from deicing salts. Flushing of salts by application of water to the underside of the concrete and electrochemical removal of the chlorides were investigated. Flushing was found to be ineffective and work on it was abandoned early. However, the electrochemical removal technique showed promise of success first in the laboratory and later in a small scale field trial. In the latter chloride present at the level of the top rebar mat was reduced to below the concentration that is known to cause corrosion in 24 hours of treatment, and active corrosion of the steel that was going on was completely stopped.
Keywords	Bridge decks Deicers Corrosion prevention Electrochemical cleaning Reinforced concrete Reinforcing steels Chlorides Washing Laboratory tests Field tests
Source Agency	Federal Highway Administration
NTIS Subject Category	50A - Highway Engineering 50C - Construction Equipment, Materials, & Supplies 71G - Corrosion & Corrosion Inhibition
Corporate Authors	Battelle Columbus Labs., Ohio.; Federal Highway Administration, Washington, D.C.
Document Type	Technical Report
Title Note	Final rept.
NTIS Issue Number	197621
Contract Number	DOT-FH-11-8133