Abstract This paper presents the application of a new test protocol developed for determining chloride threshold values initiating corrosion in reinforced concrete. The experimental set-up was described in previous work and is based on the intrinsic localized aspect of chloride-induced corrosion. The test protocol is also based on the concept of anodic control of corrosion initiation, and therefore independent of the area of passive steel. The test method is applied to mortar and concrete formulations with different binders and steel surface conditions. Chloride-binding isotherms were also determined to allow the transition from total to free chlorides. It is found that the test protocol is rapid and applicable to all formulations. The experimental results provide an understanding of the influence of binder type, w/b ratio and porosity on chloride-induced corrosion initiation. As expected, the steel surface condition is shown to have an important overall effect on corrosion initiation.

中文翻译：

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作为水泥类型和钢表面条件的函数的临界氯化物阈值

摘要 本文介绍了一种新的测试协议的应用，该协议用于确定在钢筋混凝土中引发腐蚀的氯化物阈值。实验装置在之前的工作中有所描述，并且基于氯化物引起的腐蚀的固有局部方面。测试协议也基于腐蚀引发的阳极控制概念，因此与钝化钢的面积无关。该测试方法适用于具有不同粘合剂和钢材表面条件的砂浆和混凝土配方。还确定了氯化物结合等温线以允许从总氯化物转变为游离氯化物。发现该测试方案快速且适用于所有制剂。实验结果提供了对粘合剂类型影响的理解，w/b 比率和孔隙率对氯化物引起的腐蚀引发。正如预期的那样，钢的表面状况显示出对腐蚀开始具有重要的整体影响。