Developing industrial symbiosis using UK waste clay resources for new generation building materials

该项目将通过利用陶瓷行业的废弃粘土生产高价值的创新水泥配方，提高资源效率和英国基础工业之间的共生关系。它将通过为英国建筑业提供新的低碳资源效率产品来发展工业联系并加强英国供应链。这样做将有助于确保英国的就业机会和GVA。粘土是英国三大基础工业的共同原料;水泥，陶瓷和造纸。高级粘土如瓷土被提取用于制造白色陶瓷和纸张。中等等级的粘土被提取用于制造陶瓷，如砖和瓦，而低等级的粘土被提取并被英国水泥工业用于生产波特兰水泥熟料。在提取高等级粘土以及生产和使用中等等级粘土的过程中产生了废物衍生的粘土材料在该项目中，将对来自几个不同来源的废物衍生粘土进行表征，并测试其用于水泥和混凝土生产的性能。将使用两种不同的加热方法制备废物衍生粘土，以比较所得性质。这些方法是回转窑，一种普遍可用的技术和“闪速加热”，一种新的和创新的加热技术，尚未在英国试用。准备好的材料将被专业地配制成水泥组合物，并将通过测试符合欧盟/英国标准。使用这些粘土水泥的混凝土混合料将通过混合增强化学外加剂进行开发和优化。将对新水泥和硬化水泥的性能进行检查，以最大限度地发挥新水泥的市场潜力。测试和试点工作的信息将提交给国家标准机构，以修改国家混凝土标准，消除这些新水泥的市场障碍。在英国市场部署这些新水泥可以减少140万吨废物，并减少水泥的隐含二氧化碳约与市场领先的CEM I水泥相比，10-30%。

This project will improve resource efficiency and symbiosis between UK foundation industries by utilising waste derived clay from the ceramics sector to produce high value innovative cement formulations. It will develop industrial connections and enhance UK supply chains by providing new low carbon resource efficient products for the UK construction industry. In doing so it will help to secure UK jobs and GVA.Clay is a raw material common to three of the UK foundation industries; cement, ceramics and paper. Higher-grade clays such as China clay are extracted for the manufacture of white ceramics and paper. Medium-grade clays are extracted to manufacture ceramics such as bricks and tiles, whereas lower-grade clays are extracted and utilised by the UK cement industry to produce Portland cement clinker.Waste derived clay material is generated during the extraction of higher-grade clays and through production and use of medium-grade clays (waste bricks/brick fines).In this project, waste derived clay from several different sources will be characterised and tested for the properties useful for cement and concrete production. Waste derived clays will be prepared using two different heating methods to enable comparisons of the resulting properties. These methods are a rotary kiln, a commonly available technology and 'flash heating', a new and innovative heating technique not yet trialled in the UK.The prepared material will be expertly formulated into cement compositions which will be tested for conformity to EU/UK standards. Concrete mixes using these clay cements will be developed and optimised with mix enhancing chemical admixtures. Both fresh and hardened properties will be examined to maximise the market potential of the new cements.The information from the testing and pilot work will be presented to the national standards body to modify the national concrete standards to remove a barrier to market for these new cements.Deployment of these new cements on the UK market could reduce waste by 1.4 million tonnes and reduce the embodied CO2 of cement by around 10-30% compared to the market leading CEM I cement.