A method for renewing a placement area may include one or more of the following steps. A dredge barge may be disposed inside a placement area containing materials dredged from one or more other locations and disposed within the placement area. Material may be dredged from the placement area. The dredged material may be processed. Water may be added to the placement area to maintain a flotation level of the dredge barge. The dredge barge may be removed from the placement area. The water may be removed from the placement area. This process may allow a placement area to be continually renewed and may allow useful materials to be recovered from a placement area.

Reliably safe remediated construction aggregate derived from excavated contaminated spoil remediated with a system and method using a sorbent in a verified process of testing and analysis of spoil before and after remediation and of adjusting amounts of sorbent and supplemental water mixed with contaminated spoil.

An eco-tile useful for promoting the growth of fauna and flora in an aquatic environment, the eco-tile including at least one type of cement; aggregates comprising at least two fine aggregates and coarse aggregates; and milled incineration sewage sludge ashes, wherein the at least two fine aggregates comprise dredged marine sediment, eco-concrete precursors thereof, and methods of use and preparation of the same.

An apparatus for backfill paste includes a mixing means configured to produce paste, a storage means configured to store paste, and a feeding means configured to feed paste to a borehole. The mixing means and the storing means is formed of a combined storage and mixing means. The feeding means includes a bottom discharge port configured to feed paste from the combined storage and mixing means. The apparatus includes monitoring means configured to monitor the level of paste in the combined storage and mixing means to maintain the level of paste in the combined storage and mixing means above a setpoint value so as to prevent air from entering the borehole from the combined storage and mixing means.

An apparatus for backfill paste includes a mixing means configured to produce paste, a storage means configured to store paste, and a feeding means configured to feed paste to a borehole. The mixing means and the storing means is formed of a combined storage and mixing means. The feeding means includes a bottom discharge port configured to feed paste from the combined storage and mixing means. The apparatus includes monitoring means configured to monitor the level of paste in the combined storage and mixing means to maintain the level of paste in the combined storage and mixing means above a setpoint value so as to prevent air from entering the borehole from the combined storage and mixing means.

The present invention relates to a new method for stabilising marine clays such as sediments, marine sediments, or dredging muds by using mussel shell powder and cement, their use and a respective product. A properly treated milled shell powder is mixed with a cement in order to obtain a solid composition of powders, which is subsequently mixed with the marine clay to obtain a product that can be used in the building industry.

The present invention relates to a new method for stabilising marine clays such as sediments, marine sediments, or dredging muds by using mussel shell powder and cement, their use and a respective product. A properly treated milled shell powder is mixed with a cement in order to obtain a solid composition of powders, which is subsequently mixed with the marine clay to obtain a product that can be used in the building industry.

A cement composition based on a sulfoaluminate clinker is described, together with its use for agglomerating and inerting sediment/dredging sludge, and the relative inerting method and apparatus.

A cement composition based on a sulfoaluminate clinker is described, together with its use for agglomerating and inerting sediment/dredging sludge, and the relative inerting method and apparatus.

A process and brick made therefrom uses a material sourced from a brackish waterway. The process includes at least partially drying the removed sediment material to reduce the water content thereof, passing the sediment material through a screen subsequent to the drying step to obtain dried material of a predetermined size; grinding the dried material passed through the screen to a second predetermined size; passing the ground material through a hydraulic press filter to remove salt therefrom; and using the desalinated ground material as a substitute for at least some of an amount clay used in making conventional bricks.