Outokumpu

Background

Specifying Stainless Rebar (SSR) concerns three tasks; firstly where to specify SSR, secondly which designation to specify, and thirdly how to specify SSR. In the early days experience was used and examples of areas such as splash zones and bridge parapets were cited as appropriate areas. Selective use where only certain elements used SSR was differentiated from full use where the consequential risk of corrosion was extremely high. The first and probably still the only such advice note using this terminology was the UK Highway Agency Advice Note BA84/02

         

For more information see: Standards for Highways

This note was also included in the “Stainless steel reinforcement for concrete; The use of stainless steel reinforcement in bridges” report and available below.

Interestingly both documents had the same author and his note on designation choice in the latter questioned the availability of information to make an informed choice. Designation choice remains a developmental subject and is dealt with under Choosing your SSR designation. It is dealt with in the ASTM standard A955 as a pass or fail corrosion test from manufacturer produced SSR but in BS6744 it has to be an approved alloy only. An informative annex is included on use by alloy but the applied science is not clear in modern thinking terms. On how to specify the Concrete Society technical Report TR51 led the way with suggested clauses. Eurocode EC2 also took a lead in allowing a reduction in concrete cover when using SSR.

 

Stainless steel reinforcement for concrete. The use of stainless steel reinforcement in bridges

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