Testing concrete-encased steel from the 1950s for direct reuse

测试 20 世纪 50 年代的混凝土包裹钢材是否可以直接再利用

• 批准号: 10028656
• 金额: $ 5.16万
• 依托单位: HEYNE TILLETT STEEL LTD
• 依托单位国家: 英国
• 项目类别: Collaborative R&D
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=10028656
• 关键词: Testing; concrete; encased; steel; 1950s

Steel is one of the most useful construction materials. It is strong, durable and efficient, it has been instrumental in our built environment since the mid-1800s. It is also easy to recycle -- in fact, most of the scrap steel in waste streams is already captured and properly recycled into new steel.But this is only one half of the story. Making new steel requires finite materials including coal. Making new and recycled steel requires furnace temperatures above 1500 degrees C, which means intense energy use. Even if the energy could be sourced from renewables, the chemical process itself releases carbon dioxide, a greenhouse gas. Current methods of steel manufacture are impossible to decarbonise.This means we will not be able to manufacture steel using current methods in a net zero economy.Steel is commonly found in existing buildings. When those buildings are demolished, the steel scrapped, melted and recycled into new steelwork. While it sounds positive, it is very energy-intensive process. Some manufacturing methods cannot accommodate high volumes of scrap steel. In the UK, we generate more scrap than we can deal with, and 75% of it ends up being exported.We need to close the materials loop and avoid remanufacturing when existing steel can be in perfect shape to be simply reused. Reused steel has a carbon footprint eight times smaller than traditional steel.Steel made after 1970 was subject to standard manufacturing processes and sizes, so it is easy to validate for reuse. The Steel Construction Institute has a standard method to follow for those sections to be checked for reuse. But modern steelmaking started in 1855, so this leaves out a significant proportion of existing steel.This project aims to validate a large stock of 1950s steel from four deconstructed buildings in London, by undertaking rigorous materials testing and quality analysis, and coming up with a reuse potential to keep the steel at its highest value.The project is innovative because it extends the scope of knowledge and understanding to a stock of materials that is not covered by current protocols and might facilitate the road to reuse for a larger proportion of existing steelwork, helping to further close the materials loop.

钢是最有用的建筑材料之一。它坚固耐用，效率高，自19世纪中期以来一直在我们的建筑环境中发挥作用。它也很容易回收--事实上，废流中的大部分废钢已经被捕获并适当地回收制成新钢。但这只是故事的一半。制造新钢材需要有限的材料，包括煤炭。制造新的和回收的钢材需要炉子温度在1500摄氏度以上，这意味着密集的能源消耗。即使能源可以来自可再生能源，化学过程本身也会释放二氧化碳，这是一种温室气体。目前的钢铁生产方法不可能脱碳。这意味着我们将不能在净零经济的情况下使用现有的方法生产钢铁。钢铁通常存在于现有的建筑物中。当这些建筑被拆除时，钢材被废弃、熔化并回收到新的钢材中。虽然这听起来很积极，但这是一个非常耗能的过程。一些制造方法无法适应大量的废钢。在英国，我们产生的废钢超过了我们的处理能力，其中75%最终被出口。我们需要关闭材料循环，避免再制造，因为现有的钢材可以完美地形状，简单地重复使用。重复使用的钢的碳足迹比传统钢小8倍。1970年后生产的钢受标准制造工艺和尺寸的限制，因此很容易验证是否可以重复使用。钢结构协会有一个标准的方法可以遵循，以检查这些部分是否重复使用。但现代炼钢始于1855年，因此这遗漏了相当大比例的现有钢铁。该项目旨在通过进行严格的材料测试和质量分析，并提出重复使用潜力，以保持钢铁的最高价值，来验证伦敦四座被解构的建筑中的大量20世纪50年代的钢铁库存。该项目具有创新性，因为它将知识和理解的范围扩大到当前协议未涵盖的材料库存，并可能有助于为更大比例的现有钢铁工作重复使用，帮助进一步关闭材料循环。