Tailored Reinforced Concrete Infrastructure: Boosting the Innate Response to Chemical and Mechanical Threats

定制的钢筋混凝土基础设施：增强对化学和机械威胁的固有反应

• 批准号: EP/N017668/1
• 负责人: Janet Lees
• 金额: $ 164.46万
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Fellowship
• 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%2FN017668%2F1
• 关键词: Tailored; Reinforced; Concrete; Infrastructure; Boosting

The required global infrastructure investment from 2013-2030 is estimated to be £34 trillion. Thus there are significant social and economic ramifications associated with the utilisation and design of strategic infrastructure assets which are fit for purpose both now, and in the future. Nationally, the construction sector is vital and contributes around £90 billion annually to the UK economy. This EPSRC Established Career Fellowship will provide Dr Lees with the prestige and freedom to extend the impact of her research and develop a new field of research dedicated to the creation of tailored concrete infrastructure. The enhancement of the innate characteristics of reinforced concrete with a concurrent reduction in total cement content directly links to key Engineering global grand challenges for Sustainability and Resilience. Concrete is the most widely used construction material in the world, over 4 billion tonnes in 2013, and cement production is responsible for 5-7% of man-made CO2 emissions. 'Cradle to factory gate' emissions for CEM 1 are 913 kg CO2e for 1000 kg of cement. The sustainability credentials of the proposed research are to mitigate the scale of this environmental impact through the delivery of more durable construction, a reduction in the cement content in concrete products, and material efficiency. The 'innate' characteristics of our reinforced concrete infrastructure include an inherent resistance to a myriad of deterioration causes e.g. chemical attack, chloride ingress, and mechanical actions e.g. dead and live loads. To help achieve the desired resistance, minimum cement contents are specified for a required strength or durability. In conventional practice, the same concrete mix is used throughout a given structural element. A compelling new paradigm is to break from conventional thinking and reinterpret a reinforced concrete structure as a tailored continuum to meet a desired serviceability, strength and/or durability performance. Material with high cement content is used judiciously to boost the innate response of our reinforced concrete infrastructure by explicitly recognising, targeting and reacting to environmental and mechanical threats to structural performance. In this way, there is either no loss, or an enhancement, in structural and durability functions. The innate immunity against environmental actions is boosted for corrosion prevention whereas the adaptability in response to mechanical actions is enhanced through the novel design of the concrete continuum for a greater structural resilience. These deliverables present a unique opportunity for the PI, UK Academia and UK Industry, to establish a world leading capability in a nascent field while addressing Engineering Sustainability priorities for lifetime extension, reduced lifetime costs, energy minimisation and a reduction in over-engineering.

2013年至2030年所需的全球基础设施投资估计为34万亿英镑。因此，战略基础设施资产的利用和设计具有重大的社会和经济影响，这些资产适合现在和未来的目的。在全国范围内，建筑业至关重要，每年为英国经济贡献约900亿英镑。这个EPSRC建立的职业奖学金将为李博士提供声望和自由，以扩大她的研究的影响，并开发一个新的研究领域，致力于创建量身定制的混凝土基础设施。增强钢筋混凝土的固有特性，同时减少水泥总含量，直接关系到可持续性和弹性的关键工程全球重大挑战。混凝土是世界上使用最广泛的建筑材料，2013年超过40亿吨，水泥生产占人为二氧化碳排放量的5-7%。CEM 1的“从摇篮到工厂大门”排放量为每1000公斤水泥913公斤CO2 e。拟议研究的可持续性证书是通过提供更耐用的建筑，减少混凝土产品中的水泥含量和材料效率来减轻这种环境影响的规模。我们的钢筋混凝土基础设施的“固有”特性包括对无数劣化原因的固有抵抗力，例如化学侵蚀、氯化物侵入和机械作用，例如恒载和活载。为了帮助实现所需的抵抗力，规定了所需强度或耐久性的最小水泥含量。在常规实践中，在整个给定结构元件中使用相同的混凝土混合物。一个引人注目的新范例是打破传统思维，重新解释钢筋混凝土结构作为一个定制的连续体，以满足所需的服务性，强度和/或耐久性性能。我们明智地使用高水泥含量的材料，通过明确识别、针对和应对对结构性能的环境和机械威胁，来提高我们钢筋混凝土基础设施的固有反应。通过这种方式，结构和耐久性功能既没有损失，也没有增强。增强对环境作用的先天免疫力以防止腐蚀，而通过混凝土连续体的新颖设计增强对机械作用的适应性，以获得更大的结构弹性。这些交付成果为PI、英国学术界和英国工业界提供了一个独特的机会，在一个新兴领域建立世界领先的能力，同时解决工程可持续性的优先事项，如延长寿命、降低寿命成本、能源最小化和减少过度工程。

项目成果

Wet casting of multiple mix horizontally layered concrete elements

• DOI: 10.1016/j.conbuildmat.2020.118514
• 发表时间: 2020-06-30
• 期刊: CONSTRUCTION AND BUILDING MATERIALS
• 影响因子: 7.4
• 作者: Brault, Andre;Lees, Janet M.
• 通讯作者: Lees, Janet M.

An analysis of the potential for improving cement efficiency through functionally graded concrete elements with durability-driven concrete specification

• DOI: 10.2749/prague.2022.1820
• 发表时间: 2022
• 期刊: IABSE Symposium, Prague 2022: Challenges for Existing and Oncoming Structures
• 作者: Jessica C. Forsdyke;J. Lees

Acoustic Emission Attenuation In Single-Mix And Functionally Layered Concrete Slabs

单一混合和功能分层混凝土板的声发射衰减

• DOI: 10.21012/fc11.092349
• 发表时间: 2023
• 作者: Cocking S

Model fitting to concrete carbonation data with non-zero initial carbonation depth

初始碳化深度非零的混凝土碳化数据的模型拟合

• DOI: 10.1617/s11527-023-02104-0
• 发表时间: 2023
• 期刊: Materials and Structures
• 影响因子: 3.8
• 作者: Forsdyke J

Size effects in unreinforced and lightly reinforced concrete beams failing in flexure

• DOI: 10.1016/j.engfracmech.2021.107987
• 发表时间: 2021-09
• 期刊: Engineering Fracture Mechanics
• 影响因子: 5.4
• 作者: L. Nelson;J. Lees;L. Weekes