Workshop on Interface Problems in Cement-Based Materials

水泥基材料界面问题研讨会

• 批准号: 0340915
• 负责人: Kaspar Willam
• 金额: $ 1.5万
• 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: 2004
• 资助国家: 美国
• 起止时间: 2004-01-01 至 2004-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0340915&HistoricalAwards=false
• 关键词: Workshop; Interface; Problems; Cement; Based

This workshop on Interface Behavior in conjunction with the FramCos-5Conference on Fracture Mechanics of Concrete and Concrete Structures,Vail,Colorado,April 12-16,2004. It will provide a forum for a exchange on fundamental issues related to interfacial transition zones in cement-based materials at different scales of observation.At the macroscopic level we will address adhesive bond among bi-materials such as concrete and reinforcing steel with and without polymeric coatings. At the mesoscopic level we will focus o adhesive-cohesive properties between cementitious constituents and natural aggregate inclusions as well as reinforcing members and laminates.At the microscopic level,we will examine the cohesive behavior between different .cement-based constituents. The workshop on interface fundamentals will include four sessions:(i)experimental obser-vations and sensing,(ii)theoretical aspects and material models,(iii)computational issues of delamination and fracture,and (iv)applications at different .levels of observation.The workshop presentations will be by invitation only.The discussion will benenifit from the participants of the FramCos-5 Conference who will be invited to attend the workshop at nominal cost.The intent of the workshop is to bring together leading researchers and to identify outstanding issues and a research agenda in the field of interface behavior starting from interface mechanics/chemistry all the way to repair strategies for hot and cold joining. It is the interfacial transition zone which is at the core of the workshop.The basic intenet are interface properties which determine the degradation of multi-material systems such as reinforced cement-based materials under monotonic and cyclic environments.Aside fromthe multi-scale aspects of such heterogeneous materials the workshop is intended to high-light recent advances and current issues in measuring interface properties,i formulating the constitution of zero-and finite thickness interface transition zones under multi-axial loading,in model-based simulations of interface degradation under monotonic and cyclic conditions, and in different .applications in the .field of joining and debonding.

2004年4月12日至16日，在美国科罗拉多州韦尔市举行的第五届混凝土断裂力学会议上，参加了界面行为研讨会。它将提供一个论坛，在不同的观察尺度上，水泥基材料的界面过渡区相关的基本问题进行交流。在宏观层面上，我们将解决双材料，如混凝土和钢筋之间的粘合剂粘结与不聚合物涂层。在细观层次上，我们将着重研究水泥基组分与天然集料夹杂物以及增强构件和层合板之间的粘结-内聚性能;在微观层次上，我们将研究不同水泥基组分之间的内聚行为。界面基础知识讲习班将包括四场会议：（i）实验验证和传感，（ii）理论方面和材料模型，（iii）分层和断裂的计算问题，和（iv）在不同观测水平上的应用。研讨会的演讲仅限受邀者参加。讨论将受益于FramCos-5会议的与会者，他们将以名义费用受邀参加研讨会。研讨会的目的是将主要研究人员聚集在一起，并确定界面行为领域的突出问题和研究议程，从界面力学/化学的所有方式来修复策略的热和冷连接。界面过渡区是研讨会的核心。研讨会的基本内容是界面性质，它决定了多材料系统（如增强水泥基材料）在单调和循环环境下的退化。除了这些异质材料的多尺度方面外，研讨会还旨在突出界面性质测量的最新进展和当前问题，在多轴载荷下，在单调和循环条件下界面退化的基于模型的模拟中，以及在连接和脱粘领域的不同应用中，制定零厚度和有限厚度界面过渡区的构成。