Background and objectives of the project
The environmental compatibility of cement-based building materials is currently being tested on hardened concrete. If building materials in special applications already come into contact with surface/groundwater during their processing phase, this phase should be taken into account in order to fulfil the requirements of the legally binding Construction Products Regulation. Therefore, this research project aims to develop a concept for assessing environmental compatibility, taking into account the processing phase, based on standardised procedures.
For this purpose, representative mix designs are first tested using a fresh concrete leaching test and compared with the standardised GLHC method in accordance with EN 16637-2, which was developed for granular products. Furthermore, a leaching test according to EN 16637-2 is to be carried out for each concrete, in which the concrete has just begun to set. A suitable procedure for determining the minimum curing period will be developed. It is evaluated whether the test results can be converted into each other using conversion factors.
Analogous to the assessment concept for the environmental compatibility of concrete, a typical application situation in groundwater is modelled for cement suspensions and a transfer function is derived.
