New Corrosion Resistant Low Carbon Steels for Concrete Reinforcement

摘要

Corrosion of reinforcing steel in reinforced concrete structures is placing a211u001esignificant economic burden on public agencies and private owners. Work 211u001einvestigating the use and affect of improved concrete materials, modernized 211u001emixing processes, and refined placement processes has been extensively studied 211u001eand documented. The benefits from the research are dependent only on the weak 211u001elink in the production, processing, and placement of the concrete. Quality 211u001ematerials followed by inadequate processing or placement leads to damaged 211u001estructures. A complimentary approach to improving the corrosion resistance of 211u001ereinforcement in concrete structures is to microstructurally design the steel to 211u001eprovide required strengths and improved electrochemical characteristics. The 211u001eobjective of this project was to investigate the effects of the production 211u001eprocess and resulting microstructure on the mechanical and electrochemical 211u001echaracteristics of steel embedded in concrete. Dual-phase ferritic martensitic 211u001e(DFM) reinforcing steel was produced 'on-line' for comparison with ASTM A615 and 211u001eA706 reinforcing steels.