高性能混凝土及其在大型桥梁工程中的应用  

High Performance Concrete and Its Application to Major Bridges

作　　者：苏祖平[1] 欧阳华林[1] 叶小吁[1] 陈露一[1] 

机构地区：[1]中铁大桥局集团桥科院有限公司,湖北武汉430034

出　　处：《桥梁建设》2009年第A02期35-39,共5页Bridge Construction

摘　　要：高性能混凝土(HPC)是在大幅度提高常规混凝土性能的基础上采用现代混凝土技术,选用优质原材料,除水泥、水、集料外,必须掺加足够数量的活性细掺料和高效外加剂的一种新型高技术混凝土,是以耐久性作为设计的主要指标,针对不同用途的要求,对下列性能有重点地加以保证:耐久性、施工性、适用性、强度、体积稳定性和经济性。列举了5个使用C50～C60高性能混凝土的大型桥梁工程,其中有的高性能混凝土能够通过425次冻融循环,有的高性能混凝土具有极高的抗氯离子渗透能力,其56 d龄期的电通量仅175 C,有的高性能混凝土具有极低的收缩、徐变值。The high performance concrete （HPC） is a new type high-tech concrete developed on the basis of significant improvement of the performance of conventional concrete and by using the modern concrete techniques including selection of the high quality raw materials, that is, in addition to the cement, water and aggregates, the sufficient amounts of the reactive fine and highly effective admixtures must be added. The durability is the main target in the design of the HPC and in accordance with the requirements for different utilization purposes, the following performance of the HPC, such as the durability, constructability, applicability, strength, volume stability and economic efficiency should be specially ensured. The examples of five major bridges used with the C50~C60 HPC are cited herewith, of which some of the HPC can experience the freezing and thawing cycles more than 425 times, some have the extremely strong ability to resist the permeability of chorine ion with their electric flux at the age of 56 days is merely 175 C and some have very low values of shrinkage and creep.

关 键 词：高性能混凝土 桥梁应用 抗冻融性能 抗氯离子渗透 

分 类 号：TU528[建筑科学—建筑技术科学]