Sensing Intrinsic Nano-Microstructural Characteristics of Hardening Concrete with High-Frequency Transverse Waves

用高频横波感测硬化混凝土的固有纳米微观结构特征

• 批准号: 0408427
• 负责人: Surendra Shah
• 金额: --
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-06-15 至 2008-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0408427&HistoricalAwards=false
• 关键词: Sensing; Intrinsic; Nano; Microstructural; Characteristics

Sensing Intrinsic Nano-Microstructural Characteristics of Hardening Concrete with High-Frequency Transverse WavesTo assure high quality of concrete construction, reliable sensors are needed to monitor the setting and hardening process. This proposal presents a high frequency wave reflection (HFWR) technique, which uses ultrasonic shear waves to monitor the hydration process of cementitious materials. The proposed investigations are aimed at studying the fundamental relationships among evolving microstructure, mechanical properties, and HFWR-measurements. It is intended to draw synergies by combining experimental techniques, which probe nano and microstructure and numerical modeling. The collaboration with a world-wide network of researches will involve undergraduate and graduate students. The research plan is to develop a sensor that reads the information stored in the evolving nano and microstructure and immediately use this data to infer the intrinsic mechanical properties. The procedures and models to be developed have a high potential to be generalized to other materials that undergo percolation processes.

用高频横波感测硬化混凝土的固有纳米微观结构特征为了确保混凝土施工的高质量，需要可靠的传感器来监控凝固和硬化过程。该提案提出了一种高频波反射（HFWR）技术，该技术使用超声波剪切波来监测水泥材料的水化过程。拟议的研究旨在研究不断变化的微观结构、机械性能和 HFWR 测量之间的基本关系。它旨在通过结合探测纳米和微观结构以及数值建模的实验技术来发挥协同作用。与全球研究网络的合作将涉及本科生和研究生。该研究计划是开发一种传感器，可以读取存储在不断演变的纳米和微观结构中的信息，并立即使用这些数据来推断内在的机械性能。待开发的程序和模型很有可能推广到经历渗透过程的其他材料。