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Marinecrete Mattresses ("Marinematts")

Carbon Negative Subsea Protection

Page last modified

Monday, December 14, 2020 - 13:55

Marinecrete mattresses (Marinematts) are pre-cast eco-friendly low/negative CO2 concrete structures that protect man made subsea assets whilst enhancing the marine environment due to their cavities, pH and surface texture. They are non-toxic, contain no Portland cement, zero plastics and are made with >95% recycled materials supporting the circular economy. Standard Marinecrete mattress measure 6x3m and can be deployed using conventional lifting frames. They can be part of the energy transition to carbon net zero projects and support green recycle, repurpose, reuse strategies. There use supports UN goal SDG-14 life below water.

Marinematts are designed to become the defacto standard for protecting cables, pipelines and monopiles due to their massive CO2 saving, the potential life cycle cost saving (if approved to be left in situ) and nature inclusive design benefits. They are recoverable so they can be moved and reused but designed with the potential to be approved by regulators to be left in situ forever due to their positive marine impact. Every subsea and coastal defence project can now leave a positive marine legacy to help rewild the oceans and provide hard substrate to regenerate ocean health.

Pro/con

90% lower CO2 footprint

Non-toxic to marine environment

Zero plastics

Made from 100% recycled materials

Proven eco-system enhancement

Supports SDG-14 life below water

Reduced life cycle costs if not recovered

Eliminates HSE risks if not recovered

Deployment track record to date weak

OSPAR yet to accept as suitable for long term deployment without recovery liability

Specification

Areas of Application Cable and pipeline protection, scour protection, habitat enhancement, anti-bottom trawling deterrent for MPAs.

Capabilities Global deployment strategy through licensing agreements. ARC Marine offer full reef planning, execution, monitoring and stewardship support

Compliance Nature inclusive design, formal marine concrete and lifting specification approvals pending.

Deployment Compatible with traditional deployment techniques e.g. Block grabber, lifting frames, fall pipe and tremie pipe units.

Environment Non-toxic to marine environment. Low CO2, zero plastics. Supports circular economy and SDG-14 life below water.

Lifespan Designed to be permanent (500 years+) but can be made with finite biodegradable materials for certain applications.

Material 100% recycled materials, zero plastics, 90% lower CO2 than Portland cement. Densities, surface textures and colour all configurable.

Modular design Building blocks from 15cm to 1.5m in height can be combined into complex structures. Variants for specific marine species e.g. Native oyster (Ostrea Edulis).

Patents Patent granted UK and pending in target countries including US, China and Brazil.

Protection Protects both man made assets and the surrounding eco-systems. Does not suffer from leading edge flip over unlike traditional subsea mattresses. Stable and effective in shallow and deep water anti-scour service.