CAREER: Reaction Mechanisms, Performance Assessment, and Novel Mitigation Tools for Alkali-Silica Reaction in Concrete Structures

职业:混凝土结构中碱硅反应的反应机制、性能评估和新型缓解工具

基本信息

项目摘要

This Faculty Early Career Development (CAREER) project will advance the state of knowledge on deterioration mechanisms, damage mitigation, and prediction of service-life performance for concrete structures susceptible to alkali-silica reaction (ASR). The research approach decouples the three fundamental ASR reactions (silica dissolution, gelation, and swelling) and characterizes the thermodynamic equilibrium and kinetics of each reaction as a function of the chemistry (i.e., species concentrations and interactions) and physics (e.g., temperature, pressure, humidity) of the system. This will significantly clarify the reaction mechanisms and the role of aggregate mineralogy and binder compositions, and can lead to developing more efficient ASR inhibiting admixtures, and admixture delivery methods, applicable to new and existing structures. In addition, new testing and modeling tools are developed for rapid and reliable assessment of the ASR risk and for quantitative prediction of the durability performance of concrete containing potentially reactive aggregates. Finally, ASR in emerging alkali-activated concretes is studied which allows improved reliability and market acceptance of these green materials. The project integrates multi-scale experimentation with multi-scale (geochemical, reactive-transport, and performance prediction) modeling to efficiently achieve these research goals. In addition to advancing the ASR science, the findings could be of substantial value in accelerating the synthesis and utilization of new pozzolans, geopolymers, and other high performance silica-based materials.Alkali-silica reaction continues to be a major durability problem of concrete. The resulting expansion, cracking, and loss of serviceability impose enormous maintenance and reconstruction costs for bridges, pavements, dams, and other civil infrastructure. This project performs hypothesis-driven basic research to support transformative advancements in durability, service-life extension, and as such, sustainability and resiliency of concrete infrastructure susceptible to ASR. Through fostering collaborations with national and international institutes, the project provides state-of-the-art research training for graduate and undergraduate students to become the next generation scientists and engineers. The project's technical components are well integrated with teaching and outreach activities, including (a) implementing cooperative problem-based learning to improve creative thinking and teamwork skills of undergraduate students; (b) development and dissemination of free interactive e-learning modules to familiarize students, faculty, and practicing engineers with advanced materials characterization techniques; and (c) promoting engineering at high school level to attract and engage under-represented students.
该教师早期职业发展(CAREER)项目将推进对易受碱-硅反应(ASR)影响的混凝土结构的劣化机制,损害缓解和使用寿命性能预测的知识状态。该研究方法描述了三个基本的ASR反应(二氧化硅溶解、凝胶化和溶胀),并将每个反应的热力学平衡和动力学表征为化学的函数(即,物种浓度和相互作用)和物理学(例如,温度、压力、湿度)。这将显著澄清反应机制和骨料矿物学和粘合剂组合物的作用,并可导致开发适用于新的和现有结构的更有效的ASR抑制外加剂和外加剂输送方法。此外,新的测试和建模工具开发的ASR风险的快速和可靠的评估和定量预测的耐久性性能的混凝土含有潜在的活性骨料。最后,ASR在新兴的碱活性混凝土进行了研究,使这些绿色材料的可靠性和市场接受度的提高。该项目将多尺度实验与多尺度(地球化学,反应性传输和性能预测)建模相结合,以有效地实现这些研究目标。除了推进ASR科学之外,这些发现在加速新型火山灰、地质聚合物和其他高性能硅基材料的合成和利用方面也具有重要价值。碱-硅反应仍然是混凝土的主要耐久性问题。由此产生的膨胀、开裂和服务能力的丧失给桥梁、路面、水坝和其他民用基础设施带来了巨大的维护和重建成本。该项目进行假设驱动的基础研究,以支持易受ASR影响的混凝土基础设施的耐久性、使用寿命延长以及可持续性和弹性方面的变革性进步。通过促进与国家和国际机构的合作,该项目为研究生和本科生提供最先进的研究培训,使他们成为下一代科学家和工程师。该项目的技术组成部分与教学和外联活动很好地结合在一起,包括(a)实施基于问题的合作学习,以提高本科生的创造性思维和团队合作技能;(B)开发和传播免费的互动式电子学习模块,使学生、教师和实习工程师熟悉先进的材料表征技术;及(c)在高中层面推广工程学,以吸引及吸引代表性不足的学生。

项目成果

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Farshad Rajabipour其他文献

Predicting fly ash dosages to prevent ASR by introducing the concrete prism test (CPT) chemical index model
Shear performance of fluted interfaces between ultra-high-performance concrete and conventional concrete
超高强混凝土与普通混凝土之间带肋界面的抗剪性能
  • DOI:
    10.1016/j.engstruct.2024.119512
  • 发表时间:
    2025-03-01
  • 期刊:
  • 影响因子:
    6.400
  • 作者:
    Huaian Zhang;Clay Naito;Farshad Rajabipour
  • 通讯作者:
    Farshad Rajabipour
Autogenous and drying shrinkage in Ultra-High-Performance Concrete (UHPC) and the effectiveness of internal curing
超高强混凝土(UHPC)的自生收缩和干燥收缩以及内部养护的有效性
  • DOI:
    10.1016/j.conbuildmat.2025.140217
  • 发表时间:
    2025-02-21
  • 期刊:
  • 影响因子:
    8.000
  • 作者:
    Abdullah Al Moman;Deepika Sundar;Kun Zeng;Jovan Tatar;Aleksandra Radlińska;Farshad Rajabipour
  • 通讯作者:
    Farshad Rajabipour
Optimizing grout injection: A computational and experimental study
灌浆优化:一项计算与实验研究
  • DOI:
    10.1016/j.trgeo.2025.101576
  • 发表时间:
    2025-05-01
  • 期刊:
  • 影响因子:
    5.500
  • 作者:
    Seyedeh Azadeh Mousavi Darzikolaei;Zacharia M. Sao;Jubair Ahmad Musazay;Shihui Shen;Farshad Rajabipour;Xiaofeng Liu
  • 通讯作者:
    Xiaofeng Liu
Shrinkage behavior of alkali-activated materials using ground bottom ashes, calcined clays, volcanic ashes, and fluidized bed combustion ashes as precursors
以磨细底灰、煅烧粘土、火山灰和流化床燃烧灰为前驱体的碱激活材料的收缩行为
  • DOI:
    10.1016/j.cscm.2024.e04033
  • 发表时间:
    2024-12-01
  • 期刊:
  • 影响因子:
    6.600
  • 作者:
    Roshan Muththa Arachchige;Sourav Thapa;Jan Olek;Farshad Rajabipour;Sulapha Peethamparan
  • 通讯作者:
    Sulapha Peethamparan

Farshad Rajabipour的其他文献

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{{ truncateString('Farshad Rajabipour', 18)}}的其他基金

Engineering and Life Cycle Assessment of Activated Recycled Glass-Based Concretes
活性再生玻璃基混凝土的工程和生命周期评估
  • 批准号:
    1030708
  • 财政年份:
    2010
  • 资助金额:
    $ 40万
  • 项目类别:
    Standard Grant

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