SHUTTERING: Low carbon concrete Structures witH aUxeTic TextilE foRmworks as reinforcING element

模板：采用助压纺织模板作为加固元件的低碳混凝土结构

• 批准号: EP/W019027/1
• 负责人: Raffaele Vinai
• 金额: $ 188.51万
• 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: 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%2FW019027%2F1
• 关键词: SHUTTERING; Low; carbon; concrete; Structures

Current methods of concrete construction seldom utilise the fluidity of concrete to create optimised, complex structural forms. Instead, they rely on rigid, flat, impermeable formwork to create solid, prismatic, unoptimized shapes that have poor material efficiency and consequently a large carbon footprint that is further worsened by the use of Portland cement (PC), the production of which is responsible for ~8% of worldwide CO2 emissions. We aim to address these critical limitations in formwork and cement, which not only promote material inefficiency and increase embodied carbon but also shackle creativity in design with structural concrete. SHUTTERING will develop a novel, transformative approach to concrete construction based on (i) dual-purpose auxetic textiles that serve initially as formwork - to cast concrete into creative, optimal geometries that use concrete only where it is required, and then as reinforcement - offering stiffness and strength to the structure post-hardening; and (ii) low carbon concrete based on alkali activated binders that can be sourced from industrial waste streams and have the potential to reduce embodied carbon by 70% in comparison to ordinary Portland cement.The novel concepts developed in this project will give a significant impetus to sustainable manufacturing in the construction sector as they will:- improve material utilisation efficiency greatly - by using concrete only where needed; - speed up construction process - by eliminating need for de-moulding and using AAB cement; - avoid steel reinforcement - thus eliminating corrosion risk and reducing embodied energy, as well as avoiding the time-consuming task of preparing the reinforcement steel cages;- increase structural performance - due to the inherent confinement effects of textile formwork (casing), further augmented by the negative Poisson's ratio of the auxetics; - promote circular economy - since AAB use by-products from several industrial processes.Outcomes of the projects will enable novel intelligent functionalities of concrete structural elements for IoT applications, such as diffuse fibre-based sensing devices for the structural health monitoring, and will pave the road towards complex shapes for the assembly/disassembly of structural elements, making the reuse of concrete structure a reality. Results will also foster radically new approaches for aesthetical finishing of concrete elements, in term of colour, texture, and engraved graphics.Other applications of the materials developed in this project can be predicted in the field of structural retrofitting of existing concrete structures using auxetic textiles.

目前的混凝土施工方法很少利用混凝土的流动性来创建优化的复杂结构形式。相反，他们依赖于刚性，平坦，不透水的模板来创建坚固，棱柱形，未优化的形状，材料效率低，因此碳足迹大，使用波特兰水泥（PC）进一步恶化，其生产占全球二氧化碳排放量的约8%。我们的目标是解决模板和水泥中的这些关键限制，这些限制不仅促进了材料的效率低下，增加了隐含碳，而且还束缚了结构混凝土设计的创造力。SHUTTERING将开发一种新颖的、变革性的混凝土施工方法，其基础是（i）两用拉胀纺织品，最初用作模板-将混凝土浇筑成创造性的、最佳的几何形状，仅在需要的地方使用混凝土，然后作为加固材料-为硬化后的结构提供刚度和强度;和（ii）基于碱活化粘合剂的低碳混凝土，可来源于工业废物流，并有可能将隐含碳减少70%与普通的波特兰水泥相比，该项目开发的新概念将大大推动建筑行业的可持续制造，因为它们将：-大大提高材料利用效率-仅在需要时使用混凝土;- 避免钢筋-从而消除腐蚀风险并减少隐含能量，以及避免准备钢筋笼的耗时任务;- 增加结构性能-由于纺织模板（外壳）的固有限制效应，通过负泊松比的拉胀进一步增强;- 促进循环经济-因为AAB使用多种工业过程的副产品。项目的成果将使物联网应用的混凝土结构元件具有新的智能功能，例如用于结构健康监测的基于漫射光纤的传感设备，并将为结构元件的组装/拆卸铺平复杂形状的道路，使混凝土结构的再利用成为现实。结果也将促进从根本上的新方法的美学完成的混凝土元素，在颜色，纹理和雕刻图形。其他应用的材料在这个项目中开发的可以预测在结构改造领域的现有混凝土结构使用拉胀纺织品。