US: The Rhode Island Marine Trades Association Foundation (RIMTAF) has developed a pilot programme to test the use of decommissioned fibreglass boats in cement production. After removal of fuel, batteries and metal components, around 60t of hulls were cut and shredded at a facility in Johnson, Rhode Island, before being transported to Amrize’s Holly Hill cement plant in South Carolina.
When it enters the kiln, the resin in the hull-derived material acts as a fuel, partially replacing the conventional fuel used at the plant. The glass fibres contribute to the silica content in the clinker. The material was successfully accepted by the cement plant as both a fuel source and a raw material substitute. While 60t is a drop in the ocean, it is an important step towards a value-added reuse system for discarded fibreglass boat hulls, which are estimated to reach 200,000 every year in the US alone.
