Corrosion detection in reinforced concrete using induction heating and infrared thermography
Corrosion detection in reinforced concrete using induction heating and infrared thermography
复制标题
DOI：
10.1007/s13349-010-0002-4
复制
发表时间：
2011-06-01
影响因子：
4.4
通讯作者：
Banthia, N.
中科院分区：
文献类型：
--
作者：
Kobayashi, K.;Banthia, N.
研究了一种基于感应加热和红外热像仪相结合的钢筋混凝土腐蚀无损检测新技术。这项技术的原理是，腐蚀产物的导热性很差，它们抑制了由于IH而在钢筋中产生的热量的扩散。因此，可以通过确定混凝土表面的温度分布来检测腐蚀。采用理想钢筋混凝土小试件，采用外加电流法产生锈蚀。研究了钢筋直径、保护层深度、锈蚀量和加热时间对混凝土表面温度分布的影响。结果表明，所提出的技术效果良好，腐蚀程度越大，混凝土表面温升越小。更高级的腐蚀状态也会导致螺纹钢本身的温度升高。当钢筋直径较大或保护层深度较小时，该技术效果特别好。
A novel non-destructive technique of corrosion detection in reinforced concrete based on a combination of induction heating (IH) and infrared thermography was investigated. The technique is based on the principle that corrosion products have poor heat conductivity, and they inhibit the diffusion of heat that is generated in the reinforcing bar due to IH. Corrosion can thus be detected by determining the temperature profiles on the surface of concrete. Small idealized reinforced concrete specimens were employed, and the impressed current method was used to generate corrosion. The influences of rebar diameter, cover depth, corrosion amount, and heating time on the temperature distribution on the concrete surface were investigated. It was found that the proposed techniques worked well and greater the extent of corrosion, smaller was the temperature rise on the concrete surface. A more advanced state of corrosion also led to a higher temperature rise in the rebar itself. The technique worked particularly well when either the diameter of the rebar was large or when the cover depth was small.