Understanding Radiation and Temperature Effects in Cement-Based Materials

了解水泥基材料中的辐射和温度效应

• 批准号: 1538312
• 负责人: Rouzbeh Shahsavari
• 金额: $ 36万
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-08-01 至 2018-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1538312&HistoricalAwards=false
• 关键词: Understanding; Radiation; Temperature; Effects; Cement

This project uses the fundamentals of material science to tackle the pressing needs for designing safe and failure-resistant concrete structures for extreme thermal and radiological environments. This approach can have a significant impact on discovering new cementitious materials with improved service life and safety for use in key public infrastructures such as nuclear power plants and oil and gas reservoirs, and will impact several other areas such as safe landing areas for airplanes and tunnel liners exposed to fire. The education program will develop new engineering modules and curricula that will be broadly disseminated to catalyze the fusion of computational material science and extreme conditions. Furthermore, underrepresented students and women will be recruited and retained in STEM areas through the professional Engineering Leadership Alliance at Rice University.The overarching technical objective is to fundamentally understand the physiochemical degradation processes of Calcium-Silicate-Hydrate (C-S-H), the smallest building blocks of concrete, at elevated temperatures and radiations, followed by utilization of this knowledge to design new intercalated hexagonal Boron Nitride (hBN)/C-S-H composites. The underlying methodology lies in developing atomistic simulations connected to advanced synthesis and characterization techniques to understand and control the basic degradation phenomena at the heart of conventional and hybrid cement-based materials. This project will be innovative in its attempts to unravel the complex behavior of C-S-H under irradiation using collision cascade simulations. Intercalation of exfoliated hBN sheets with an optimum thickness into the sub-nanometer basal spaces of C-S-H are novel elements in cementitious materials. The research will link the complex ab-initio scale of chemistry, electron transfer, and radiation- and temperature-induced deterioration processes with the scale of mechanics. As such, this project will potentially lead to a new line of research in cementitious and infrastructure materials.

该项目使用材料科学的基本原理来解决针对极端热和放射学环境设计安全和抗故障混凝土结构的紧迫需求。这种方法可能会对发现新的水泥材料产生重大影响，并具有改善的服务寿命和安全性，以便在核电厂以及石油和天然气储层等主要公共基础设施中使用，并将影响其他几个地区，例如用于暴露于火灾的飞机和隧道衬里的安全着陆区。教育计划将开发新的工程模块和课程，这些模块和课程将被广泛传播，以促进计算材料科学和极端条件的融合。 Furthermore, underrepresented students and women will be recruited and retained in STEM areas through the professional Engineering Leadership Alliance at Rice University.The overarching technical objective is to fundamentally understand the physiochemical degradation processes of Calcium-Silicate-Hydrate (C-S-H), the smallest building blocks of concrete, at elevated temperatures and radiations, followed by utilization of this knowledge to design new intercalated hexagonal硝酸硼（HBN）/C-S-H复合材料。潜在方法在于开发与先进合成和表征技术相关的原子模拟，以理解和控制常规和杂化水泥材料中心的基本降解现象。该项目将尝试使用Collision Cascade模拟在辐射下揭示C-S-H的复杂行为的创新性。在C-S-H的亚纳米基础空间中具有最佳厚度的去角质HBN片的插入是胶结材料中的新元素。这项研究将将化学，电子转移以及辐射和温度诱导的劣化过程的复杂AB-Initio量表与力学量表联系起来。因此，该项目有可能导致胶结和基础设施材料的新研究。