Workshop on Interface Problems in Cement-Based Materials

这一界面行为研讨会与2004年4月12日至16日在科罗拉多州韦尔举行的FramCos-5混凝土和混凝土结构断裂力学会议相结合。它将提供一个论坛，在不同的观察范围内就与水泥基材料界面过渡区有关的基本问题进行交流。在宏观层面上，我们将解决混凝土和钢筋等双材料之间的粘结问题，包括有或没有聚合物涂层。在细观层面上，我们将重点研究胶凝材料与天然集料夹杂物之间的粘结性能，以及加固构件和层合板之间的粘结性能。在微观层面上，我们将研究不同水泥基组分之间的粘结行为。关于界面基本原理的研讨会将包括四个部分：(I)实验观察和传感，(Ii)理论方面和材料模型，(Iii)分层和断裂的计算问题，以及(Iv)不同观察水平的应用。研讨会的报告将仅通过邀请进行。讨论将使被邀请参加研讨会的FramCos-5会议的与会者受益。研讨会的目的是聚集领先的研究人员，并确定界面行为领域的突出问题和研究议程，从界面力学/化学开始，一直到修复热连接和冷连接的策略。它是界面过渡区的核心。基本的内涵是界面性质决定了多材料系统，如增强水泥基材料在单调和循环环境下的退化。除了这种非均质材料的多尺度方面，研讨会旨在突出测量界面性质的最新进展和当前问题，我制定了多轴载荷下的零厚度和有限厚度界面过渡区的组成，在基于模型的单调和循环条件下界面退化的模拟中，以及在连接和剥离领域的不同应用。

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.