Corrosion resistance of steel fibres in concrete under marine exposure

✍ Scribed by P.S. Mangat; Kribanandan Gurusamy

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 642 KB
• Volume: 18
• Category: Article
• ISSN: 0008-8846
• DOI: 10.1016/0008-8846(88)90120-2

✦ Synopsis

This is the final paper of a series (i, 2, 3) which have reported different aspects of a long term study on the marine durability of steel fibre reinforced concrete (sfrc) . Two mixes, one with and one without pfa were reinforced with three ty?es of steel fibres.

The cement content of the mixes was 430 and 590 kg/m ~ respectively.

Prism specimens of these mixes were cured under marine exposure, both in the laboratory and at Aberdeen beach, for up to 2000 wet-dry cycles (12OO days).

The state of corrosion of the steel fibres was investigated visually and by electrochemical analysis of fibres exposed at fractured surfaces of specimens after flexural testing.

The results show that the generally accepted activation level of 0.4% Cl by weight of cement does not apply to sfrc.

Similarly, the threshold value of O.61 for the --(Cl-----~) ratio, as proposed by Hausemann for initiation (OH-) of Corrosion, is not valid to steel fibre reinforced concrete.

No corrosion

-(CI-)

of fibres embedded in concrete was evident at C1 and ~ levels greatly exceeding the above values.