The main cause of corrosion of reinforcing steel, especially in infrastructure structures, is the penetration of chlorides, which can lead to high corrosion rates at the reinforcement steel. A frequently used accelerated test method to evaluate the chloride penetration resistance of concrete and mortars is the rapid chloride migration (RCM) test. The test was initially developed for ordinary Portland cement (OPC) based materials and involves spraying an indicator solution onto split test specimens to determine the penetration depth of the chloride ions. The pore solution compositions of new types of binders differ from OPC‐based materials, which can affect the reaction of the indicator solution. To investigate the suitability of the RCM test, the chloride content in the depth of the color change was determined in mortars made from different types of novel binders. The results show that the test provides reliable results for the binder types with partial replacement of OPC by supplementary cementitious materials. For binder types without OPC, there is a deviation in the migration coefficient due to a differing chloride concentration that triggers the color change.

中文翻译：

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快速氯化物迁移测试用于确定由不同新型粘合剂类型制成的砂浆中的迁移系数的适用性

钢筋腐蚀的主要原因，尤其是基础设施结构中的钢筋腐蚀，是氯化物的渗透，这会导致钢筋腐蚀速率较高。评估混凝土和砂浆抗氯离子渗透性的常用加速测试方法是快速氯离子迁移（RCM）测试。该测试最初是针对普通波特兰水泥 (OPC) 基材料开发的，涉及将指示剂溶液喷洒到分裂测试样本上，以确定氯离子的渗透深度。新型粘合剂的孔隙溶液组成与OPC基材料不同，这会影响指示剂溶液的反应。为了研究 RCM 测试的适用性，测定了由不同类型的新型粘合剂制成的砂浆中颜色变化深度的氯化物含量。结果表明，该试验为补充胶凝材料部分替代OPC的粘结剂类型提供了可靠的结果。对于不含 OPC 的粘合剂类型，由于触发颜色变化的不同氯化物浓度，迁移系数存在偏差。