ABSTRACT
Deinking sludge ash (DSA) and deinking sludge (DS) represent the main waste from recycled deinking paper pulp production in a paper industry. Their mixtures were used in this research to develop a composite with the proper geomechanical properties for the backfill of GRS retaining structure. Several mixtures with different contents of DS and DSA were initially tested to develop an optimal composite. The chosen composite was used as a backfill material of the retaining wall structure built in the south part of Slovenia, near the railway line, for landslide stabilization. All laboratory and field tests confirmed the required physical characteristics are being reached.
