TY - JOUR A1 - Drenkard, Hannah A1 - Fischer, Christian A1 - Sauer, Veit A1 - Gehlen, Christoph T1 - On the Chloride Distribution in Concrete and Mortar Samples after an RCM Test JF - Materials N2 - It is of essential need to face the challenges of CO2 reduction in industrial cement and concrete production reliable test methods in order to evaluate the performance of concretes, especially with regard to the service life of our infrastructure. The rapid chloride migration test (RCM test) is a standard method to assess the resistance against chloride ingress of concrete. However, during our study, certain critical questions arose with regard to the chloride distribution. The sharp chloride ingress front based on the model assumptions contradicted the shallow gradient of the experimental data. For this reason, investigations on chloride distribution in concrete and mortar samples after RCM tests were performed. The focus was on the factors influencing the extraction, e.g., time after RCM test and the location on sample. Furthermore, differences between concrete and mortar samples were investigated. The investigations showed that no sharp gradient on concrete samples was found due to the extremely uneven chloride front. In contrast, the theoretical profile shape was instead demonstrated on mortar specimens. The prerequisite for this result is that the drill powder must be taken directly after the completion of the RCM test from very uniform penetration areas. Thus, the model assumptions on the chloride distribution via the RCM test could be confirmed. KW - chloride profile; RCM test; drill powder; concrete; mortar; chloride migration coefficient; chloride ingress front Y1 - 2023 U6 - https://doi.org/10.3390/ma16082952 SN - 1996-1944 VL - 16 IS - 8 SP - 2952 EP - 2952 ER -