Construction and evaluation of mine cover systems with upgraded soil - Experience gained from laboratory and pilot

Important results from the project

The project’s goals have been achieved. The test facility and laboratory columns were built as planned, although somewhat later than planned due to delays in the recruitment process. The measurement station will continue to be used in the future, and the work will proceed in a new cooperation. The execution of the trials, combined with experience from previous projects, has been used to develop the promised recommendations. Publication of the handbook will take place later this autumn.

Expected long term effects

Facilitating innovation by enabling more efficient testing of new materials for sealing layers, with faster evaluations made possible by reducing the need for extensive test areas. Strengthening confidence of contractors and regulatory authorities in the proposed solutions, in their effectiveness now and in the future. Furthermore, newly established collaborations will support continued development of this work, with a specific focus on conditions in the Nordic region.

Approach and implementation

The project involved the construction of test areas (in the field) and columns built with the same materials and at nearly the same scale. These were used both to gain experience in conducting this type of testing (for the guidance) and to generate data for the development of a working methodology aimed at facilitating the evaluation of these materials and structures. The project timeline was delayed due to a lengthy recruitment process. Collaboration between the parties worked well.