The Evolution and Spread of Ash Reef Technology - 2020s

The Evolution and Spread of Ash Reef Technology - 2020s

In the 2020s, the technology of using ash for artificial reefs has continued to evolve, playing a critical role in both environmental conservation and waste management. This technology has been introduced not only in Japan but also in countries like South Korea, Taiwan, and Indonesia, contributing to the recovery of marine ecosystems in these regions.

Leading companies such as Mitsui Engineering & Shipbuilding and Hitachi Zosen continue to spearhead this technology, with further innovations being developed in the 2020s. The latest advancements have improved the durability of artificial reefs made from fly ash, and environmentally friendly materials are being used to further reduce the long-term environmental impact.

For example, in Tokyo Bay and the Seto Inland Sea, artificial reefs have been installed, leading to a more than 30% increase in fish populations, confirming the recovery of marine ecosystems. Similar successes have been reported in coastal areas of Jeju Island in South Korea and in Taiwan, greatly contributing to the recovery of fishery resources.

Additionally, a new material combining fly ash and carbon fiber-reinforced concrete has been developed, offering enhanced strength and environmental adaptability. This technology was co-developed by Japanese companies Shimizu Corporation and Obayashi Corporation and is expected to spread across Asia in the coming years.

Another development in the 2020s is the use of ash not only for artificial reefs but also in projects aimed at preventing marine pollution and reducing waste. For instance, in Jakarta Bay, Indonesia, a project has begun to reuse urban waste as ash for the installation of artificial reefs, addressing marine waste issues.