CAREER: Linking Nanoscale and Macroscale Viscoelastic Responses of Cementitious Materials

职业：连接水泥材料的纳米尺度和宏观粘弹性响应

• 批准号: 0843979
• 负责人: Zachary Grasley
• 金额: $ 40万
• 依托单位: Texas A&M Engineering Experiment Station
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2013-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0843979&HistoricalAwards=false
• 关键词: CAREER; Linking; Nanoscale; Macroscale; Viscoelastic

The overall purpose of both the educational and research components of this CAREER plan is to foster an improved understanding of multi-scale material behavior in the civil engineering community. The principal objective of the research plan is to link the inherent, aging viscoelastic properties of the nanometric, cement paste phases to macroscale viscoelastic response of portland cement paste. The research plan will utilize an integrated experimental, analytical, and computational materials science approach to model the inherent aging viscoelastic properties of the nanometric phases of hydrating portland cement. Subsequently, the aging viscoelastic properties of bulk cement paste will be modeled using composite microstructural finite element models. The principal objective of the education plan is to develop an ?analogy inventory? for improved education of future civil engineers with analogies as teaching tools of abstract multi-scale materials science concepts. The proposed research and education plan will ultimately transform the way concrete is designed, resulting in safer, more sustainable concrete infrastructure. The educational component will revamp materials science curricula for future engineers so that they have an improved grasp of the influence of nanoscale properties on macroscale behavior of engineering materials, allowing the findings from multi-scale material research to be rapidly adopted in practice. The framework developed for the creation of analogy inventories will be applicable to alternative disciplines, ultimately affecting engineering education as a whole. Additionally, the methodology developed in this project for modeling nanoscale aging viscoelastic properties will be applicable to several other fields of study including biomechanics and polymer science.

该职业计划的教育和研究部分的总体目的是促进对土木工程界多尺度材料行为的更好理解。 该研究计划的主要目标是将纳米水泥浆相的固有老化粘弹性与波特兰水泥浆的宏观粘弹性响应联系起来。 该研究计划将利用综合实验，分析和计算材料科学方法来模拟水合波特兰水泥纳米相的固有老化粘弹性。 随后，散装水泥浆体的老化粘弹性性能将模拟使用复合微观结构有限元模型。 教育计划的主要目标是发展一个？类比库存？改进未来土木工程师的教育，将类比作为抽象多尺度材料科学概念的教学工具。 拟议的研究和教育计划将最终改变混凝土的设计方式，从而产生更安全，更可持续的混凝土基础设施。 教育部分将为未来的工程师修改材料科学课程，使他们更好地掌握纳米级特性对工程材料宏观行为的影响，使多尺度材料研究的结果能够迅速应用于实践。 为创建类比库存而开发的框架将适用于其他学科，最终影响整个工程教育。 此外，在这个项目中开发的建模纳米级老化粘弹性的方法将适用于其他几个研究领域，包括生物力学和聚合物科学。