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在收集国内外关于无涂层钢筋和环氧涂层钢筋锈蚀率和蚀坑深度试验结果的基础上,提出了水泥混凝土路面无涂层钢筋和环氧涂层钢筋传力杆的锈蚀率以及锈蚀率和蚀坑深度的关系,对比分析了传力杆在无涂层和有环氧涂层条件下的使用寿命。计算结果表明,无涂层钢筋传力杆在腐蚀严重的地区只能满足5~12年的寿命要求,而环氧涂层钢筋传力杆可以满足28~30年的使用寿命要求。
On the basis of collecting the test results of corrosion rate and pitting depth of uncoated steel bar and epoxy coated steel bar both at home and abroad, the corrosion rate and corrosion resistance of uncoated steel bars and epoxy coated steel bars in cement concrete pavement are proposed The relationship between the rate and the depth of pits is analyzed and the service life of the dowel bars under uncoated and epoxy-coated conditions is comparatively analyzed. The calculation results show that the uncoated steel dowel bar can only meet the life expectancy of 5 to 12 years in areas with severe corrosion, while the epoxy coated steel dowel bar can meet the service life requirements of 28 to 30 years.