Abstract: The present invention relates to a method for recycling of synthetic material containing waste. In the process initially in a first step the synthetic material containing waste is crushed to a particle diameter ?100 mm and then admixed as aggregate in a soil material, in particular in a silt containing soil for the earthworks. The portion of the synthetic material containing waste admixed in the second step is preferably 15 percent by volume to 70 percent by volume. The resulting soil material is in many aspects excellently suited for the earthworks and in particular, for the recultivation or the protection of problematic landfill areas.

Abstract: A method for the sealing of soil formations, a mineral sealing layer consisting of cohesive soil and of an aggregate being applied to the soil formation and then being compacted mechanically, the aggregate used being dry, sewage or water sludge with a dry substance content of at least 70% by weight (sludge TS.gtoreq.70) in a quantity 5 to 50% by weight in relation to sludge dry substance and calculated on the dry weight of the soil.

Abstract: A process for constructing a self-sealing layer for landfills and waste dumps that use a base layer, cap layer, or liner to seal the area from water percolation through cracks or holes. A layer of soil is provided having specified characteristics which will become flowable under the effects of water moving through the layer. The soil is moved into the crack or hole by the water and accumulates until the breach is sealed. Geotextiles, otherwise known as textile mats, may be used inside the layer to reinforce the layer and enhance the self sealing effect of the flowable soil layer. Water glass and an appropriate gelling agent may be used in an embedding zone on either side of the mat to enhance the adhesion between the mat and the material in the cap, base, or liner.

Abstract: A process for sealing soil formations, especially for sealing the base of a waste dump or encapsulating waste dumps or old sources of pollution. By this process, sewage sludge or river mud is mixed with water absorbent aggregate that is approximately 30-70 wt %, based on sludge or mud dry weight, forming a compressible non-hardening mixture. The resultant mixture is then applied to the soil formation and compressed mechanically, forming a non-hardening seal.

Abstract: A process for constructing a self-sealing layer for landfills and waste dumps that use a base layer, cap layer, or liner to seal the area from water percolation through cracks or holes. A layer of soil is provided having specified characteristics which will become flowable under the effects of water moving through the layer. The soil is moved into the crack or hole by the water and accumulates until the breach is sealed. Geotextiles, otherwise known as textile mats, may be used inside the layer to reinforce the layer and enhance the self sealing effect of the flowable soil layer. Water glass and an appropriate gelling agent may be used in an embedding zone on either side of the mat to enhance and adhesion between the mat and the material in the cap, base, or liner.