摘要
介绍预应力钢绞线的防腐措施和相关材料的特点,指出各种材料防腐适用的环境。先张预应力混凝土结构,在轻微腐蚀环境中可以直接使用光面PC钢绞线,腐蚀严重或者有氯离子的环境可以选择环氧树脂涂层钢绞线;无黏结是后张预应力结构较理想的防腐方式,但要处理好锚固端的密封防腐。钢绞线体外索(拉索)防腐中,透明波纹管的使用范围受限制且污染环境;环氧树脂钢绞线在制作过程中,松弛损失增加约2.5倍,制造过程难度大、成本高;一般腐蚀环境选择PC预应力钢绞线+内涂层+HDPE套管的方式,腐蚀严重的环境选择镀锌钢绞线(或环氧树脂涂层钢绞线)+内涂层+HDPE套管的方式。
To introduce anti-corrosion measure and characteristic of relative material of prestressed steel strand.Anti-corrosion of various material suitable environments is pointed out.Pre-tensioning prestressed concrete can adopt naked PC steel strand in slight corrosion environments,choose epoxy coating steel strand in serious corrosion or chloridion environment.Binderless is a better anti-corrosion way of post-tensioning structure,but sealing anti-corrosion of anchor end should be treated well.The usage scope of transparent bellows is restricted for its environmental pollution in anti-corrosion of steel strand external tendons.Relaxation loss is increased about 2.5 times,difficulty of production process is great,cost is high in production process of epoxy steel strand.The way of PC prestressed steel strand,internal coating and HDPE sleeve is chosen in usual corrosion environment,the way of galvanized steel strand or epoxy coating steel strand,internal coating and HDPE sleeve is chosen in serious corrosion environment.
出处
《金属制品》
2010年第5期32-36,共5页
Metal Products
关键词
预应力钢绞线
无黏结
镀锌
环氧树脂涂层
prestressed steel strand
binderless
galvanizing
epoxy coating
