REBUILD - REgenerative BUILDings and products for a circular economy

在循环经济中，价值是通过有效的再循环和再利用来保持产品和材料的“流动”，以优化其最大的经济潜力，并最大限度地减少原始材料的使用和外部环境成本。新建筑和现有建筑存量为循环经济创新、价值保留和创造机会提供了最大的潜力，估计每年价值约为450 - 6亿欧元。目前难以再利用的建筑产品的回收创新——混凝土、钢、砖，从使用寿命结束（EOSL）的建筑中，将其重新制造成新的模块化产品，用于新建筑，然后为未来的解构而设计。因此是一个重大的经济机遇。REBUILD建议将材料直接再利用并重新制造成新的建筑，减少再加工。该项目提出了一个新的循环经济体系，以解决目前拆除和新建建筑的线性方法中的主要障碍，并通过早期采用新技术、高价值再制造、新系统安排和扩大良好实践来建立能力和工具，以创造重大的新价值。这个机会的重要性是相当可观的。现有的建筑不是为适应、拆卸或高价值再利用而设计的。因此，目前的选择是当它们达到EOSL时拆除它们。在英国，每年大约有5万幢建筑被拆除，产生4500万吨垃圾，其中大部分是混凝土和砖石、砖和钢铁。在这4500万吨中，只有一小部分被回收，主要用于遗产产品或易于拆卸的结构，如门式框架的钢截面。EOSL建筑被视为成本最小化，其清除速度对商业至关重要，随后的主要损失是所含碳、能源、材料和潜在价值。为了使圆形建筑成为建筑行业的主流，必须消除再利用难以解构的建筑的障碍，包括使用水泥砂浆砌体、钢筋混凝土、钢-混凝土组合结构，这些结构占英国建筑吨位和成本的绝大部分。REBUILD项目启动了将所有当前建筑和未来建筑转换为材料和产品库的过程，允许保留高价值的材料和产品，以供未来重复使用。运输和储存的成本意味着，要在商业上取得成功，产品的修理、再制造和再利用将需要达到区域/地方规模。为了创造对重复使用产品的需求接受度，REBUILD测试过程旨在展示技术性能质量保证的行业标准。创造需求需要系统重新设计和协调，以新的合作方式整合价值链中的所有活动，包括建筑和制造、拆除和其他关键活动（融资、公共采购、规划），以释放和分享产品再利用的价值。在循环经济区域中心的城市规模内，这种整合可能是最佳的。该系统设计将与我们的工业利益相关者一起创建和建模。该项目将量化、度量和评估不同系统配置的价值创造和产品重用的大小，以及针对业务照常（BAU）参考案例的场景。与行业利益相关者团体的持续互动，以及通过他们的网络更广泛的建筑行业，将确保我们的项目方向保持接近行业需求，我们的研究成果以最有效的方式传达给行业。

In a circular economy value is created by keeping products and materials 'in flow' through effective recirculation and re-use to optimise their highest economic potential and minimise the use of virgin materials and external environmental costs. New construction and existing building stocks present the highest potential for circular economy innovation, value retention and creation opportunities, estimated to be worth approximately Euro 450 - 600M p.a. Innovation in the reclamation of currently hard to re-use building products - concrete, steel, brick, from end of service life (EOSL) buildings and their remanufacture into new modular products for new builds which would then be designed for future deconstruction, is therefore a major economic opportunity. REBUILD proposes that materials are directly reused and remanufactured into new builds with minimal re-processing. The project proposes a new circular economy system to address key barriers in the current linear approaches to demolition and new building construction, and build capabilities and tools to create significant new value by the early adoption of novel technologies, high value remanufacture, new system arrangements and the scaling up good practices. The magnitude of the opportunity is considerable. Existing buildings were not designed for adaptation, dis-assembly, or high value reuse. Therefore, the current option is to demolish them when they reach EOSL. In the UK approximately 50,000 buildings are demolished each year generating 45Mt of wastes, the majority of this is concrete and masonry, brick and steel. Of this 45Mt, only a small percentage is reclaimed, mostly for heritage products or easily demountable structures such as steel sections from portal frames. EOSL buildings are treated as costs to be minimised with speed of clearance commercially critical and a subsequent major loss of embedded carbon, energy, materials and potential value.For circularity to become mainstream in the building construction industry, it is imperative that barriers to reuse hard to deconstruct buildings, including using cement mortar based masonry, reinforced concrete, steel-concrete composite structures, which account for the vast majority of UK construction tonnage and cost, must be removed. REBUILD starts the process of converting all current building at the end of their first life and future buildings into material and product banks allowing the retention of high value materials and products for future repeat reuse. The cost of transport and storage means that repair, remanufacture and reuse of products to be commercially successful will need to be regional/local scale. To create demand acceptance for re-used products REBUILD testing processes are designed to demonstrate industry standards of quality assurance of technical performance. Creating demand requires a system re-design and co-ordination to integrate all the activities in the value chain including construction and manufacture, demolition and other key activities (financing, public procurement, planning), in new ways to collaborate to unlock and share value from product re-use. This integration is likely to be optimal at city scale within a circular economy regional hub. This system design will be created and modelled with our industrial stakeholders. The project will quantify, measure and evaluate the magnitude of value creation and product re-use for different system configurations and scenarios against a Business as Usual (BAU) reference case. Continual interactions with the industrial stakeholder group, and through their networks the wider construction industry, will make sure that the direction of our project stays close to industrial needs and the outcomes of our research are communicated to the industry in the most effective way.