工业CT在混凝土钢筋腐蚀检测中的应用

Application of Industrial CT in Corrosion Detection of Concrete Reinforcement

钢筋混凝土是世界上使用最广泛的建筑材料之一,钢筋混凝土建筑所处的外部环境容易造成其内部钢筋的腐蚀,而最终影响整体构件使用寿命。通过制作钢筋混凝土预制构件试样,采用模拟加速内部钢筋腐蚀过程,对其进行三维工业CT检测并分析混凝土中钢筋的腐蚀程度,并测量腐蚀层厚度,最后通过解剖、金相分析来验证工业CT测量结果。结果表明:采用工业三维CT检测技术能够实现对混凝土中钢筋腐蚀情况的无损检测及精确测量。

Reinforced concrete is the most widely used building materials in the world.Changes in the external environment shall cause changes in internal steel corrosion and ultimately affect the overall component life.In this paper,the corrosion process of reinforced concrete is made by simulating and accelerating the internal steel corrosion process.The corrosion degree of the steel in concrete is measured and analyzed by three-dimensional industrial CT.The thickness of the corrosion layer is measured and the results of industrial CT are verified by anatomy and metallographic analysis.The results show that the industrial three-dimensional CT detection technology can realize the non-destructive testing and accurate measurement of the corrosion of steel bars in concrete.