Together with Dutch company Netics, Kalmar Municipality is exploring how lake and sea sediments can be pressed into blocks resembling concrete paving stones. With customised moulds and high-pressure technology, the material can be turned into building products for car parks, walkways, and other urban spaces – offering a sustainable alternative to traditional concrete.
Reuse of marine sediments
Published 24-09-2025In late August, the FBB project team in Kalmar attended the launch of the first products, paving stones, made from dredged sediments from Malmfjärden. Its a follow-up to the study visit held during the May project meeting.
The first pavements stones with sediments from Malmfjärden