REBUILD - REgenerative BUILDings and products for a circular economy

重建 - 循环经济的再生建筑和产品

• 批准号: EP/P008917/2
• 负责人: Peter Hopkinson
• 金额: $ 117.43万
• 依托单位: UNIVERSITY OF EXETER
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FP008917%2F2
• 关键词: REBUILD; REgenerative; BUILDings; products; circular

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.

在循环经济中，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，从而创造价值。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4.5亿至6亿欧元。因此，在回收目前难以再利用的建筑产品（混凝土、钢、砖）方面进行创新，从使用寿命结束（EOSL）的建筑物中将其再制造成新的模块化产品，然后为未来的拆除设计，这是一个重大的经济机会。REBUILD建议直接重复使用材料，并以最少的再加工将其再制造成新的建筑。该项目提出了一个新的循环经济体系，以解决当前拆除和新建建筑的线性方法中的主要障碍，并建立能力和工具，通过早期采用新技术，高价值再制造，新的系统安排和扩大良好实践来创造重要的新价值。这一机会是巨大的。现有建筑物的设计不是为了适应、拆卸或高价值再利用。因此，目前的选择是在这些建筑物到达EOSL时将其拆除。在英国，每年大约有5万座建筑物被拆除，产生4500万吨废物，其中大部分是混凝土和砖石，砖和钢。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，如门式框架的钢型材。EOSL建筑被视为成本最小化，清除速度商业上至关重要，随后主要损失嵌入的碳，能源，材料和潜在价值。为了使循环成为建筑施工行业的主流，必须消除再利用的障碍，包括使用水泥砂浆砌体，钢筋混凝土，钢-混凝土组合结构，占英国建筑吨位和成本的绝大多数，必须被删除。REBUILD开始将所有现有建筑物在其第一次使用寿命结束时以及未来建筑物转换为材料和产品银行的过程，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产品的维修、再制造和再利用要取得商业成功，就必须是区域/地方规模的。为了创造对再利用产品的需求接受，REBUILD测试流程旨在展示技术性能质量保证的行业标准。创造需求需要重新设计和协调系统，以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），以新的方式进行合作，以释放和分享产品再利用的价值。在循环经济区域枢纽内，这种整合可能是城市规模的最佳选择。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、测量和评估不同系统配置和场景下的价值创造和产品再利用的程度，并与业务即服务（BAU）参考案例进行比较。与行业利益相关者群体的持续互动，并通过他们的网络与更广泛的建筑行业进行互动，将确保我们的项目方向贴近行业需求，并以最有效的方式将我们的研究成果传达给行业。

项目成果

Developing advanced techniques to reclaim existing end of service life (EoSL) bricks - An assessment of reuse technical viability

开发先进技术来回收现有的使用寿命结束 (EoSL) 砖 - 评估再利用技术可行性

• DOI: 10.1016/j.dibe.2020.100006
• 发表时间: 2020
• 期刊: Developments in the Built Environment
• 影响因子: 8.2
• 作者: Zhou K

Estimation of structural steel and concrete stocks and flows at urban scale-towards a prospective circular economy

• DOI: 10.1016/j.resconrec.2021.105821
• 发表时间: 2021-08-12
• 期刊: RESOURCES CONSERVATION AND RECYCLING
• 影响因子: 13.2
• 作者: Ajayebi, Atta;Hopkinson, Peter;Wang, Yong
• 通讯作者: Wang, Yong

Reclaiming structural steels from the end of service life composite structures for reuse - An assessment of the viability of different methods

从使用寿命结束的复合结构中回收结构钢以供再利用 - 不同方法的可行性评估

• DOI: 10.1016/j.dibe.2022.100077
• 发表时间: 2022
• 期刊: Developments in the Built Environment
• 影响因子: 8.2
• 作者: Chen H

Recovery and reuse of structural products from end-of-life buildings

• DOI: 10.1680/jensu.18.00007
• 发表时间: 2019-04
• 期刊: Proceedings of the Institution of Civil Engineers - Engineering Sustainability
• 作者: P. Hopkinson;Hanning Chen;Kan Zhou;Yong C. Wang;D. Lam

REBUILD: Regenerative Buildings and Construction systems for a Circular Economy

重建：循环经济的再生建筑和施工系统

• DOI: 10.1088/1755-1315/225/1/012015
• 发表时间: 2019
• 期刊: Earth and Environmental Science
• 作者: Ajayabi A