US-Algeria Cooperative Research: Limestone Concrete Durability Research

美国-阿尔及利亚合作研究：石灰石混凝土耐久性研究

• 批准号: 0138306
• 负责人: Winston Soboyejo
• 金额: --
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-06-01 至 2008-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0138306&HistoricalAwards=false
• 关键词: US; Algeria; Cooperative; Research; Limestone

0138306SoboyejoDescription: This award is to support a collaborative project by Dr. Winston Soboyejo, Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey, Dr. Alfred Soboyejo, Department of Aerospace Engineering, The Ohio State University and Dr. Said Kenai, Department of Civil Engineering, University of Blida, Blida, Algeria. The research will focus on developing a basic understanding of the effects of limestone content on the fracture and fatigue behavior of limestone cements. The manufacture of limestone concrete and the characterization of their basic properties (composition, structure, strength and permeability) will be done in Algeria. Electron microscopy and x-ray diffraction techniques will be used to further characterize the structure of the cementious materials at Princeton University and at the National Institute of Standards and Technology (NIST). Fracture behavior studies will be carried at Princeton University, including the crack-microstructure interactions and the process zone development associated with resistance-curve behavior. The crack-tip shielding mechanisms observed during the resistance-curve experiments and fatigue crack growth will then be modeled. The effect of relative humidity and temperature on fatigue crack growth will be investigated, and will be modeled. A U.S.-Algeria workshop on the durability of limestone cements will be held in Algeria during the final year of the program, to introduce state-of-the-art concepts on limestone cement concrete to graduate students, industrial representatives and researchers from Algeria and the U.S.Scope: This project deals with a problem of significant value to most developing countries and also of significance to the United States. Limestone cements are considerably less expensive and more environmentally friendly to produce than existing cements. The project will investigate the value of these materials as structural cement for static and dynamic loads. Limestone is readily available in Algeria and most Middle East countries and if it can be used in cements would help increase housing availability to the growing populations. In the U.S. such materials, if proven successful, would help reduce the environmental impact of producing cement. The project will initiate a US-Algeria collaboration in the area of science and technology. One US graduate student from the Princeton University will participate in the project in Algeria. This proposal meets the INT objective of supporting collaborative research in areas of mutual scientific interest.

0138306Soboyejo 描述：该奖项旨在支持新泽西州普林斯顿大学机械与航空航天工程系 Winston Soboyejo 博士、俄亥俄州立大学航空航天工程系 Alfred Soboyejo 博士和阿尔及利亚布利达布利达大学土木工程系 Said Kenai 博士的合作项目。该研究的重点是加深对石灰石含量对石灰石水泥断裂和疲劳行为影响的基本了解。 石灰石混凝土的制造及其基本特性（成分、结构、强度和渗透性）的表征将在阿尔及利亚进行。 普林斯顿大学和美国国家标准与技术研究所 (NIST) 将使用电子显微镜和 X 射线衍射技术进一步表征水泥材料的结构。 普林斯顿大学将进行断裂行为研究，包括裂纹与微观结构的相互作用以及与电阻曲线行为相关的工艺区发展。然后将对电阻曲线实验和疲劳裂纹扩展期间观察到的裂纹尖端屏蔽机制进行建模。 我们将研究相对湿度和温度对疲劳裂纹扩展的影响，并对其进行建模。 该项目最后一年将在阿尔及利亚举办关于石灰石水泥耐久性的美国-阿尔及利亚研讨会，向阿尔及利亚和美国的研究生、工业代表和研究人员介绍石灰石水泥混凝土的最先进概念。范围：该项目解决的问题对大多数发展中国家具有重要价值，对美国也具有重要意义。 与现有水泥相比，石灰石水泥的生产成本要低得多，而且更环保。 该项目将研究这些材料作为静态和动态载荷结构水泥的价值。 石灰石在阿尔及利亚和大多数中东国家很容易获得，如果可以将其用于水泥将有助于增加不断增长的人口的住房供应量。 在美国，如果这种材料被证明是成功的，将有助于减少水泥生产对环境的影响。 该项目将启动美国与阿尔及利亚在科学技术领域的合作。 普林斯顿大学的一名美国研究生将参加阿尔及利亚的项目。 该提案符合 INT 支持共同科学兴趣领域合作研究的目标。