Engineered UK clays for production of low-carbon cements

用于生产低碳水泥的英国工程粘土

• 批准号: EP/W022583/1
• 负责人: Hong Wong
• 金额: $ 127.16万
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FW022583%2F1
• 关键词: Engineered; UK; clays; production; low

Portland cement concrete is the most heavily used manufactured material on the planet after clean water, and it is integral to modern life. However, the production of 4 billion tonnes of Portland cement per year is responsible for 8% of global man-made greenhouse gas emissions. With the growing threat of climate change, there is an urgent need to decarbonise cement production. Currently, the most viable approach to reduce cement's carbon footprint involve the widespread use of supplementary cementitious materials (SCMs), such as fly ash from electricity generation and ground granulated blast furnace slag from steel manufacture. However, with decarbonisation of electricity and the decline of UK steel manufacture, these materials are becoming increasingly scarce. Therefore, we need to develop low-carbon alternatives, without disrupting construction practice nor compromising on long-term performance. This is the ultimate goal of this project.Recently, there has been growing interest in using clays as cementitious materials in the production of low-carbon concrete because they are practical, affordable, and scalable. The UK has abundant clay resources that can be easily obtained from overburdens of existing quarries and infrastructure development projects, where they are currently regarded as wastes. However, most of the clay in the UK and globally are low grade and are less reactive compared to high purity kaolinite clays. Therefore, there is a need to develop focussed solutions based on these low-grade clay deposits, rather than to depend on the importation of alternatives from thousands of miles. This project is timely since increased infrastructure activity, e.g. Crossrail, HS2, as well as driving increased demand for cement and concrete, will also lead to higher production of construction spoils that contain waste clays. Thus, we will develop new low-carbon cements from locally sourced clay-bearing construction and mining spoils. Using these in concrete production is a highly sustainable and circular solution; turning waste clays into valuable resources.The development of low-carbon cements is vital, but if these new materials are not translated from the laboratory to the construction site, then the necessary change will not arise. To achieve this, we will examine the performance of these new low-carbon cements from manufacture, through site practice to understanding long-term durability. The research team will work with industry from all along the supply chain to ensure that the newly developed materials satisfy industry requirements and are adopted as wide as possible to maximise carbon reductions of our built environment. In summary, the research team and their industrial partners will develop new cements from locally sourced low-grade waste clays to significantly reduce the carbon footprint of concrete and ensure performance along the entire lifetime of infrastructure. This will help the UK to deliver on its plans to decarbonise and achieve a net-zero economy.

波特兰水泥混凝土是地球上仅次于清洁水的使用最广泛的制造材料，它是现代生活不可或缺的一部分。然而，每年 40 亿吨波特兰水泥的产量占全球人为温室气体排放量的 8%。随着气候变化威胁日益严重，水泥生产脱碳迫在眉睫。目前，减少水泥碳足迹的最可行方法是广泛使用辅助胶凝材料（SCM），例如发电中的粉煤灰和钢铁制造中的磨细粒状高炉矿渣。然而，随着电力脱碳和英国钢铁制造业的衰落，这些材料变得越来越稀缺。因此，我们需要开发低碳替代方案，既不扰乱施工实践，也不影响长期性能。这是该项目的最终目标。最近，人们对使用粘土作为胶凝材料生产低碳混凝土越来越感兴趣，因为它们实用、价格实惠且可扩展。英国拥有丰富的粘土资源，可以很容易地从现有采石场和基础设施开发项目的覆盖层中获得，但目前这些粘土资源被视为废物。然而，英国和全球的大多数粘土都是低品位的，与高纯度高岭石粘土相比，其反应性较低。因此，需要根据这些低品位粘土矿床开发有针对性的解决方案，而不是依赖从千里之外进口替代品。由于基础设施活动增加，例如，该项目是及时的。 Crossrail、HS2 以及推动水泥和混凝土需求的增加，也将导致含有废粘土的建筑弃土产量增加。因此，我们将利用当地的粘土建筑和采矿废土开发新型低碳水泥。在混凝土生产中使用这些是一种高度可持续的循环解决方案；将废弃粘土变成有价值的资源。低碳水泥的发展至关重要，但如果这些新材料没有从实验室转移到施工现场，那么必要的改变就不会发生。为了实现这一目标，我们将检查这些新型低碳水泥从制造、现场实践到了解长期耐久性的性能。研究团队将与整个供应链的行业合作，确保新开发的材料满足行业要求并尽可能广泛地采用，以最大限度地减少我们建筑环境的碳排放。总之，研究团队及其工业合作伙伴将利用当地采购的低品位废粘土开发新型水泥，以显着减少混凝土的碳足迹，并确保基础设施在整个生命周期内的性能。这将有助于英国实现脱碳和实现净零经济的计划。

项目成果

Engineered UK clays for the production of low-carbon cements

用于生产低碳水泥的英国工程粘土

• 发表时间: 2023
• 作者: Kemp SJ

Upcycling end-of-life bricks in high-performance one-part alkali-activated materials

• DOI: 10.1016/j.dibe.2023.100231
• 发表时间: 2023-09
• 期刊: Developments in the Built Environment
• 影响因子: 8.2
• 作者: Yazeed A. Al-Noaimat;Mehdi Chougan;Mazen J. Al‐Kheetan;M. Yio;Hong S. Wong;S. Ghaffar

Smart & Sustainable Infrastructure: Building a Greener Tomorrow - Proceedings of the 1st Interdisciplinary Symposium on Smart & Sustainable Infrastructure (ISSSI 2023)

聪明的

• DOI: 10.1007/978-3-031-53389-1_28
• 发表时间: 2024
• 作者: Basavaraj A