Floatation Element for Vessels and Vessel Comprising One Such Floatation Element

A buoyancy block for a vessel, comprising a concrete made of expanded foam balls with closed cells coated in a flexible binding, the unfilled volumes between the balls not exceeding approximately 20% of the volume of the buoyancy block.

A vessel with a rigid hull supporting at least one outer float extending at least bilaterally, wherein the float is a buoyancy block comprising:

• a core consisting of a concrete made of expanded polypropylene balls coated in a polyurethane binding, the unfilled volumes between the balls not exceeding approximately 20% of the volume of the buoyancy block,
• at least one polyurethane coating skin coating the core, and
• a coupling film interposed between the core and the coating skin.

A vessel with a rigid hull, which incorporates at least one buoyancy block comprising:

• a core consisting of a concrete made of expanded polypropylene balls coated in a polyurethane binding, the unfilled volumes between the balls not exceeding approximately 20% of the volume of the buoyancy block,
• at least one polyurethane coating skin coating the core, and
• a coupling film interposed between the core and the coating skin, and which is conformed so as to be suitable for being inserted and enclosed in a free volume of a vessel included at least partly in the rigid hull.

A vessel with a rigid hull, which incorporates at least one buoyancy block which comprises a concrete made of expanded foam balls with closed cells coated in a flexible binding, the unfilled volumes between the balls not exceeding approximately 20% of the volume of the buoyancy block, and which is molded directly into a free volume of a vessel included at least partly in the rigid hull.