U.S.-Egypt Cooperative Research: Dynamic Characterization of Egyptian Hot Mix Asphalt Concrete for Highway Pavement Design and Evaluation

该项目支持爱达荷州莫斯科爱达荷州大学土木工程系的福阿德·巴奥米博士和埃及开罗美国大学建筑工程系的萨夫万·凯德尔博士开展的合作研究。该项目的目标是使用现代先进技术对埃及沥青混合料进行表征，这些技术是Superpave混合料设计系统的一部分，需要开发新的机械-经验(M-E)设计方法所需的路面设计参数。现行的柔性路面设计方法是经验性的，与沥青混合料的力学性能无关。它主要依赖于1986-1993年AASHTO设计指南，该指南目前正朝着新的(M-E)路面设计系统发展。该项目分为两个阶段。首先，研究和开发沥青结合料和集料的基本性能与混合料性能之间的分析关系或模型。第二，对沥青混合料及其材料进行动态表征。所有动态测试将在埃及的AUC实验室进行。使用成像技术来确定微观结构参数及其与混合料设计参数的关系的集料和混合料测试将在UI进行。PI和来自伊利诺伊大学的一名研究生将与AUC团队一起工作，研究最近开发的路面技术。Khedr博士和AUC的一名初级科学家将访问UI，为该项目工作。除了发表报告和论文外，研究成果还将在项目结束时通过在开罗举行的培训研讨会传播。智力优势：该项目将通过寻求将热拌沥青(HMA)的动态特性与其组分的特性联系起来的分析和经验关系和模型来推动路面工程科学的发展。这种关系将加强目前使用Superpave技术的HMA混合料设计和评估。此外，这些混合料的动态特性将允许将混合料设计与使用新的机械-经验(M-E)路面设计方法的路面结构设计联系起来，该方法即将在美国和许多其他国家实施。广泛的影响：除了促进美国和埃及机构之间的合作外，该项目还将影响不仅在埃及，而且在美国的路面设计和施工技术的进步。这将导致埃及出台新的路面设计规范。爱达荷大学的一名学生将参与埃及的研究，至少一名埃及初级科学家将参与爱达荷大学的研究。项目结束时的培训研讨会将使路面设计和施工技术方面的研究成果和人员专业发展得以实际实施。该项目由美国-埃及联合基金计划支持，该计划为两国的科学家和工程师提供资助，以开展这些合作活动。

0612630BayomyDescription: This project supports collaborative research by Dr. Fouad Bayomy, Department of Civil Engineering, University of Idaho (UI), Moscow, Idaho and Dr. Safwan Khedr, Construction Engineering Department, the American University in Cairo (AUC), Egypt. The goal of the project is to characterize the Egyptian asphalt mixes using modern advanced techniques that are part of the Superpave mix design system and are required to develop pavement design parameters that are needed for a new mechanistic-empirical (M-E) design method. The current flexible pavement design method is empirical and does not relate to the mechanical properties of the asphalt mixes. It relies primarily on the 1986-1993 AASHTO design guide, which is currently moving towards a new (M-E) pavement design system. The project has two phases. First, to investigate and develop analytical relationships or models that relate the basic properties of asphalt binders and aggregates to the mix properties. Second, to perform dynamic characterization of asphalt mixtures and its materials. All dynamic testing will be conducted at the AUC laboratory in Egypt. Aggregates and mixtures testing using imaging techniques to determine micro structure parameters and its relation to the mix design parameters will be performed at UI. The PI and a graduate student from UI will travel to work with the AUC team on the recently developed pavement technologies. Dr. Khedr and a junior scientist from AUC will visit the UI to work on the project. In addition to reports and papers publication, research findings will be disseminated via a training workshop to be held in Cairo at the end of the project.Intellectual Merit: This project will advance the pavement engineering science by seeking the development of analytical as well as empirical relationships and models that relate the dynamic properties of the hot-mix asphalt (HMA) to the properties of its constituents. Such relationships will enhance the current HMA mix design and evaluation using the Superpave techniques. Furthermore, the dynamic characterization of these mixes will allow for linking the mix design to the pavement structural design using the new mechanistic-empirical (M-E) pavement design method, which is soon to be implemented in the US and in many other countries.Broader Impacts: In addition to facilitating collaboration between the US and Egyptian institutions, this project should impact the advancement of pavement design and construction technologies not only in Egypt but also in the USA. It will lead to a new pavement design code in Egypt. One student from the University of Idaho will participate in the research in Egypt, and at least one junior scientist from Egypt will participate in the research at the University of Idaho. The training workshop at the end of the project will allow for practical implementation of the research findings and personnel professional development in pavement design and construction technologies.This project is being supported under the US-Egypt Joint Fund Program, which provides grants to scientists and engineers in both countries to carry out these cooperative activities.