Bond of Epoxy-Coated Reinforcing Steel to Concrete

在旧的钢筋混凝土建筑和桥梁中，钢筋的腐蚀已经成为一个严重的问题，在某些情况下已经导致停车结构的完全倒塌。为了消除或至少减少混凝土结构中钢筋的腐蚀，目前的做法是在钢筋上涂环氧树脂涂层。然而，对于混凝土的不同强度水平和钢筋的不同尺寸，涂层钢筋与混凝土的粘结性尚未进行评估。本项目将研究环氧涂层钢筋的粘结特性，以确定设计值，从而确保钢筋混凝土结构的安全。要研究的两个主要参数是不同尺寸的钢筋，这些钢筋可以嵌入不同强度水平的混凝土中。实验数据将用于建立规范，并将作为数学模型的基础。这项研究的结果将有利于地方，州和联邦机构参与所有类型的钢筋混凝土结构的建设。作为一项确保钢筋混凝土结构安全的必要活动，该项目被从业人员和学者强烈推荐。从过去的混凝土研究经验来看，研究人员是非常合格的，而且大学里有实验设施。这是一个为期两年的项目的第一年奖。第一年的数额为109,657美元，第二年为113,787美元。

ln old reinforced concrete buildings and bridges corrosion of the steel reinforcing bars has become a serious problem and in some cases has caused a complete collapse of parking structures. In order to eliminate or at least minimize the corrosion of steel reinforcement in concrete structures, current practice uses epoxy- coatings on the bars. However, the bond adherence of the coated bar with the concrete has not been evaluated with respect to the various strength levels of the concrete and the various sizes of steel bars. This project will examine the bond characteristics of epoxy-coated reinforcing bars in order to establish design values which will ensure the safety of the reinforced concrete structures. The two major parameters to be investigated are the different sizes of the reinforcement which may be embedded in concrete of various strength levels. The experimental data will be used to establish code regulations and will serve as a basis for a mathematical model. The results of this research will be beneficial to local, state and Federal bodies involved with construction of reinforced concrete structures of all types. The project is highly recommended by practitioners and academicians as a needed activity to ensure the safety of reinforced concrete structures. The researcher is highly qualified from past experience in research activities of concrete, and the experimental facilities are available at the university. This is the first year award of a two year project. The amount for the first year is $109,657 and $113,787 for the second year.