Experimental Study and Theoretical Modeling of High Performance Recycled Aggregate Concrete

高性能再生骨料混凝土的实验研究和理论建模

• 批准号: 0900607
• 负责人: Franck Vernerey
• 金额: $ 25万
• 依托单位: University of Colorado at Boulder
• 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: 2009-06-01 至 2013-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0900607&HistoricalAwards=false
• 关键词: Experimental; Study; Theoretical; Modeling; Performance

"This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)."Recycling concrete aggregates from demolished infrastructure is becoming an important research topic for sustainable development of the construction industry in the U.S. and the world. To addresses this issue, the objective of the present research is to identify and design an optimal interface between recycled aggregate and cement paste that will lead to high-performance recycled concrete. To achieve this goal, the method will consist of three components. The first component will identify a surface treatment method for processing recycled aggregates to match the properties of the resulting recycled concrete with regular concrete. The second stage will combine theoretical and experimental studies to quantify the behavior and fracture of the aggregates/cement paste interfacial zone. Thirdly, these results will be incorporated into a multiscale computational model in order to relate the microstructure of recycled concrete to its structural performance and fracture resistance.In terms of societal benefits, this research will address the increasing problem of the cost and environmental impact of waste disposal and transportation of demolished concrete. The ability to use on-site crushed concrete particles as aggregates will provide a sustainable solution for the construction of low cost, high performance and ecologically friendly infrastructures. Moreover, this project provides a unique opportunity for graduate students to study experimental, analytical and numerical methods for developing high performance recycled concrete. The students will have an opportunity to apply theoretical modeling tools in a very important practical engineering problem and have some insight on the sustainable development of our nation?s infrastructure system.

“该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。“从被拆除的基础设施中回收混凝土骨料正在成为美国和世界建筑业可持续发展的重要研究课题。为了解决这个问题，本研究的目的是确定和设计一个最佳的界面之间的再生骨料和水泥浆，这将导致高性能再生混凝土。为实现这一目标，该方法将包括三个部分。第一个组成部分将确定一种表面处理方法，用于处理再生骨料，以使再生混凝土的性能与普通混凝土相匹配。 第二阶段将结合联合收割机的理论和实验研究，以量化骨料/水泥浆体界面区的行为和断裂。第三，这些结果将被纳入一个多尺度的计算模型，以联系再生混凝土的微观结构，其结构性能和断裂resistance.In社会效益方面，这项研究将解决日益增长的问题的成本和环境影响的废物处理和运输拆除混凝土。使用现场破碎的混凝土颗粒作为骨料的能力将为低成本，高性能和生态友好型基础设施的建设提供可持续的解决方案。此外，该项目为研究生提供了一个独特的机会，研究开发高性能再生混凝土的实验，分析和数值方法。 学生将有机会在一个非常重要的实际工程问题中应用理论建模工具，并对我们国家的可持续发展有一些见解。的基础设施体系。