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首页> 外文会议>17th Annual Interantional Bridge Conference and Exhibition; Jun 12-14, 2000; Pittsburgh, Pennsylvania, USA >Stainless Steel Reinforcement in Bridge Construction Status Year 2000
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Stainless Steel Reinforcement in Bridge Construction Status Year 2000

机译：2000年桥梁施工中的不锈钢加固

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Stainless steel as rebar reinforcement for concrete is gaining increased acceptance for bridge construction and other highway applications in North America. The resistance of stainless steels to corrosion from chlorides and ease of fabrication and handling have increased its acceptance as a construction material. The availability of stainless steel from domestic sources in a variety of alloys and sizes, new ASTM specifications and TEA research funding has generated new projects in North America. Major research studies sponsored by the FHWA have also publicized stainless steel's excellent resistance to the corrosion problems brought about by chlorides as compared to a host of other materials for reinforcement. North American studies in both the United States and Canada as well as European studies have documented its corrosion resistance and indicated a life cycle expectation well in excess of fifty years. Even in demanding applications where exposure to heavy salting is expected, the life cycle of stainless alloys is expected to approach 100 years in concrete. Development of stainless rebar alloys with high nitrogen contents and special microstructures has allowed project designers to save construction costs in other areas of corrosion protection allowing the higher initial costs of stainless steel to be substantially reduced. This paper will describe the typical applications encountered in which stainless steel's corrosion resistance, magnetic permeability and strength can reduce or eliminate corrosion and benefit the user. Stainless alloys 316LN and Duplex 2205 will be discussed for use in concrete reinforcement in bridge decks, columns, barrier walls and other highway applications in North America. Mechanical and corrosion properties of stainless steel in comparison to other materials will also be presented. Projects in six to eight states / provinces will be reviewed with regard to alloy selection and its effects on the corrosion resistance and mechanical properties obtained. This information, in the hands of the design engineer has the potential to solve many of the corrosion problems encountered in bridge and infrastructure construction in the new century.
机译：在北美，作为混凝土的钢筋用不锈钢越来越受到桥梁建设和其他高速公路应用的认可。不锈钢具有抗氯化物腐蚀的能力，并且易于制造和处理，从而提高了其作为建筑材料的接受度。来自国内的各种合金和尺寸的不锈钢供应，新的ASTM规格以及TEA研究经费，在北美产生了新的项目。由FHWA赞助的主要研究成果还表明，与许多其他增强材料相比，不锈钢对氯化物所引起的腐蚀问题具有出色的抵抗力。在美国和加拿大进行的北美研究以及在欧洲进行的研究都证明了其耐腐蚀性，并指出其使用寿命有望超过五十年。即使在要求承受高盐分的苛刻应用中，不锈钢在混凝土中的使用寿命也有望接近100年。具有高氮含量和特殊微结构的不锈钢钢筋合金的开发使项目设计人员可以节省其他腐蚀防护领域的建筑成本，从而可以大大降低不锈钢的较高初始成本。本文将介绍典型的应用，在这些应用中，不锈钢的耐腐蚀性，磁导率和强度可以减少或消除腐蚀，并使用户受益。将讨论不锈钢316LN和双相2205在北美的桥面，立柱，隔离墙和其他高速公路应用中用于混凝土加固的情况。与其他材料相比，还将介绍不锈钢的机械和腐蚀性能。将对六到八个州/省的项目进行合金选择及其对耐腐蚀性和机械性能的影响的审查。这些信息掌握在设计工程师手中，有可能解决新世纪桥梁和基础设施建设中遇到的许多腐蚀问题。

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