Harbor dredged sea mud replaces sand and gravel aggregate, and combines geopolymer cementitious materials to make wave blocks, fish reefs, and offshore wind power base concrete prefabricated blocks. Desilted sea mud can be harmlessly disposed and utilized as resources.

Bulk industrial solid waste such as steel slag and fly ash is ground and chemically activated to obtain gelling activity. It is combined with tail slag and harbor dredged sea mud to manufacture large wave blocks and fish reefs. Solid waste utilization is combined with ocean engineering.

Fish reefs are made from steel slag and tailings slag. The metal components rich in iron, manganese and other metals provide necessary elements for the growth of seaweed and promote the rapid attachment of seaweed to build a marine ecosystem; functional fish reefs are added to promote the reproduction of marine microorganisms. Nutritional ingredients further accelerate the growth of algae.

Steel slag, blast furnace slag, and fly ash are used as the main components and an activator is added to form a cementitious material with controllable reaction time, and a mud-water separator is used to achieve rapid bleeding and settlement of sediment, and then gel and solidify to form the foundation bearing strength.