Early Chloride Corrosion of Reinforced Concrete - A Test Report


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Title: Early Chloride Corrosion of Reinforced Concrete - A Test Report

Author(s): Ergin Atimtay and Phil M. Ferguson

Publication: Journal Proceedings

Volume: 70

Issue: 9

Appears on pages(s): 606-613

Keywords: beams (supports) : chlorides; concrete slabs:concretes; corrosion: covet; cracking (fracturing) : prestressing;reinforced concrete; reinforcing ; research: salt water: stresses: water-cement ratio.

Date: 9/1/1973

Exposure test results of 18 flexural beams and 15 unloaded slabs are reported. The main variables were the depth of clear cover, level of steel stress, presence or absence of flexural crackmg, water-cement ratio, bar diameter, and prestressing. It has been found that there is an interaction between the cover and the bar diameter which can be expressed as the c/di, ratio. This ratio is more meaningful in predicting corrosion resistance than just the clear cover in inches, A higher c/db ratio and f lower water-cement ratio proved very effective m improving corrosion protection. Concrete cracking, the level of steel stress, and prestressing made relatively only a small contribution to corrosion deterioration in these tests.