Summary
Belgium is a large user of concrete for the construction of roads and building structures. As such, the National Research Centers take interest since a long time in the problem of concrete aggression in contact with deicing salts. To evaluate this aggression, the Belgian researchers use two different test methods: on one hand the one described in the technical note NTN-018 and on the other hand the one of the ISO-DIS 4846 document. This last one is used as a reference in the working documents of the different Regions. However, since 2006, a technical specification CEN/TS 12390-9 aims to render mandatory the utilization of one the three following methods: the SLAB-Test (as reference method), the CUBE-Test and the CF-CDF Test (as alternative methods). Comparing the documents of these 5 methods (2 nationals and 3 European), we observe differences like the temperature cycles, the dimensions of the samples, the electrolytes, the conservation of the specimens, … This leads to an important research topic in which different types of concrete are submitted to the five methods in order to obtain propositions for normative recommendations. |