On the penetration of corrosion products from reinforcing steel into concrete due to chloride-induced corrosion
On the penetration of corrosion products from reinforcing steel into concrete due to chloride-induced corrosion
复制标题
由于氯化物引起的腐蚀，腐蚀产物从钢筋渗透到混凝土中
DOI：
10.1016/j.corsci.2010.03.025
复制
发表时间：
2010-07-01
影响因子：
8.3
通讯作者：
Jin, W. L.
中科院分区：
文献类型：
--
作者：
Wong, H. S.;Zhao, Y. X.;Jin, W. L.
通过暴露于循环NaCl喷雾和40 ℃干燥，钢筋混凝土被腐蚀到不同程度。使用图像分析测量腐蚀产物的量和引起的损伤。结果表明，腐蚀产物可以在钢-混凝土界面处积累，也可以渗透水泥浆体，并在水化产物、反应渣残余物和空隙中存款。随着腐蚀程度的增加，产物倾向于在钢-混凝土界面处积累，而穿透水泥浆体的量保持相对恒定。只需要少量的腐蚀就可以引起可见的盖破裂。建模时间覆盖开裂的影响进行了讨论。(C)2010爱思唯尔有限公司版权所有。
Reinforced concretes were corroded to varying degrees by exposing to cyclic NaCl spray and 40 degrees C drying. The amount of corrosion products and induced damage were measured using image analysis. We found that corrosion products can accumulate at steel-concrete interface as well as penetrate cement paste and deposit within hydration products, relicts of reacted slag, and air voids. As corrosion increases, the products tend to accumulate at the steel-concrete interface, while the amount penetrating cement paste remains relatively constant. Only a small amount of corrosion is needed to induce visible cover cracking. Implications on modelling time to cover cracking are discussed. (C) 2010 Elsevier Ltd. All rights reserved.