EFFICIENCY OF SURFACE IMPREGNATION METHODS FOR PRE-CONDITIONED CONCRETE UNDER PORT ENVIRONMENTS

摘要：

Surface impregnation materials have a great potential in the application forconcrete structures exposed to port environments because they are expected to be able toprevent the water absorption and chloride penetration into concrete and consequently enhancethe structural durability. There are two groups of popularly applied surface impregnationmaterials,namely silane-based water repellent agent and sodium silicate (water glass)-basedsealer. To investigate their efficiency in repairing/improving the durability of reinforcedconcrete structures exposed to port environments,which are usually characterized with severeconstruction and service conditions,e.g. high humidity and frequent dry/wet cycling,etc.,aresearch project was conducted to study the durability of concrete/reinforced concretespecimens treated with 5 different surface impregnation materials. The emphasis was on theeffects of pre-conditions of concrete before the surface impregnation treatment consideringthe actual severe construction conditions during the execution of repair for the port structures.This paper summarizes key findings from this project. It is concluded that the long-termefficiency of a surface impregnation method largely depends on appropriate materialselections and careful assessments on the initial conditions of the concrete substrates.

关键词： Surface impregnation method concrete chloride penetration cracks port environment

作者: J.G Dai Y. Akira H. Yokota P. Zhang F.H. Wittmann

作者单位: Department of Civil and Structural Engineering,The Hong Kong Polytechnic University,Hong Kong,PR Chi Life Cycle Management Research Centre,Port and Airport Research Institute,Japan Qingdao Technological University,PR China

会议类型: 国际会议

会议名称: The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)

会议地点: 杭州

会议语种:英文

页码: 1136-1142

在线出版日期: 2008-11-01（万方平台首次上网日期，不代表论文的发表时间）