Smart, Bio-Inspired, Nano-Engineered Fiber Reinforced Cementitious Composites for Sustainable Infrastructure Rehabilitation and Maintenance

用于可持续基础设施修复和维护的智能仿生纳米工程纤维增强水泥基复合材料

• 批准号: 146990-2013
• 负责人: Banthia, Nemkumar
• 金额: $ 4.01万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=636080
• 关键词: Smart; Bio; Inspired; Nano; Engineered

Repair and strengthening of our rapidly deteriorating concrete infrastructure is a major challenge for Canada, and durable, sustainable and high performance repair materials along with effective processes for their application are critically needed. The primary objective of the research program proposed here is to develop Sprayable, Low-Carbon High Performance Fiber Reinforced Cementitious Composites (LC-HPFRCC) for repair and strengthening applications. It is further proposed to explore the potential of some of these composites as smart materials and sensors for Structural Health Monitoring (SHM). Research is proposed in the following FOUR areas:--Development of strain-hardening LC-HPFRCC with a strain capacity approaching 3%. These composites will be based on low carbon matrices such as geopolymers and carry recycled aggregates and recycled fibers. For recycled products, surface treatments including nano-coatings and grafting and cleaning methods such as ultrasonic vibrations and microwaving will be investigated. --Optimization of LC-HPFRCC properties as repair materials including their shear/tensile bond capacity, dimensional, physico-chemical and electro-chemical compatibility with old substrate concrete, and their ability to control rebar corrosion in repaired structures. ---Development of Smart, Piezo-resistive Fiber Reinforced Cementitious Composites (PFRCC) carrying carbon fibers and carbon nanotubes for sensing not only strains and temperatures, but also for sensing changes in the chemical environment, progression of chloride front, onset of steel corrosion and cracking. Finally, it is proposed to evaluate the performance of LC-HPFRCC as rehabilitation materials in four demonstration projects including a bridge, a parking garage, a dam and a school in BC requiring seismic strengthening. Over the next five years, the proposed program of research is expected to provide a total HQP training of 30 graduate student-years.

对于加拿大，维修和加强我们快速恶化的混凝土基础设施是一项主要挑战，耐用，可持续和高性能的维修材料以及对其应用的有效过程。这里提出的研究计划的主要目标是开发可喷涂的低碳高性能纤维增强胶结复合材料（LC-HPFRCC），以维修和加强应用。进一步提议探索其中一些复合材料作为结构性健康监测（SHM）的智能材料和传感器的潜力。在以下四个领域中提出了研究： - 应变能力接近3％的应变的LC-HPFRCC的发展。这些复合材料将基于低碳基质，例如地质聚合物，并携带回收的聚集体和回收纤维。对于再生产品，将研究包括纳米涂料以及嫁接和清洁方法（例如超声波振动和微波炉）的表面处理。 - 将LC-HPFRCC特性作为修复材料（包括其剪切/拉伸键容量），尺寸，物理化学和电化学兼容性与旧底物混凝土以及控制修复结构中的钢筋腐蚀的能力。 ---携带碳纤维和碳纳米管的智能，压电纤维增强的胶合复合材料（PFRCC），不仅可以感应菌株和温度，还用于感应化学环境的变化，氯化物前部的进展，钢腐蚀和裂纹的发作。最后，建议在四个示范项目中评估LC-HPFRCC作为康复材料的性能，包括桥梁，停车场，大坝和卑诗省的一所学校，需要进行地震稳定。在接下来的五年中，预计拟议的研究计划将提供30个研究生年的HQP培训。