Low-carbon construction materials for the builders of tomorrow
The circular economy between steel and cement
Cocoon transforms the by-product of electric steelmaking into LoopCem™, a scalable, low-carbon Supplementary Cementitious Material (SCM).
Our Product
Meet LoopCem™ — a cost-competitive, low-carbon SCM engineered from Electric Arc Furnace (EAF) slag. LoopCem™ performs comparably to existing SCMs at a 30% weight replacement ratio, meeting industry benchmarks for strength and durability.
Cement and Concrete producers can reduce embodied CO₂ by up to 27% by replacing a portion of Ordinary Portland Cement (OPC) with LoopCem without any premium required.
Meet LoopCem™ — a cost-competitive, low-carbon SCM engineered from Electric Arc Furnace (EAF) slag. LoopCem™ performs comparably to existing SCMs at a 30% weight replacement ratio, meeting industry benchmarks for strength and durability.
Cement and Concrete producers can reduce embodied CO₂ by up to 27% by replacing a portion of Ordinary Portland Cement (OPC) with LoopCem without any premium required.
Our Process
Our system seamlessly integrates with existing slag-handling operations at EAF steel mills.
Molten slag is cooled up to 100× faster than conventional slag granulation and produces a reliable SCM with consistent reactivity indexes between 85-100%.
Why we do what we do
Steel and cement drive 14% of global CO₂ emissions. Our technology can enable both industries to decarbonize and avoid over 10 million tonnes of CO₂ by 2032.
The circular economy between steel and cement
Cocoon transforms the by-product of electric steelmaking into LoopCem™, a scalable, low-carbon Supplementary Cementitious Material (SCM).
Our Product
Meet LoopCem™ — a cost-competitive, low-carbon SCM engineered from Electric Arc Furnace (EAF) slag. LoopCem™ performs comparably to existing SCMs at a 30% weight replacement ratio, meeting industry benchmarks for strength and durability.
Cement and Concrete producers can reduce embodied CO₂ by up to 27% by replacing a portion of Ordinary Portland Cement (OPC) with LoopCem without any premium required.
Our Process
Our system seamlessly integrates with existing slag-handling operations at EAF steel mills.
Molten slag is cooled up to 100× faster than conventional slag granulation and produces a reliable SCM with consistent reactivity indexes between 85-100%.
Why we do what we do
Steel and cement drive 14% of global CO₂ emissions. Our technology can enable both industries to decarbonize and avoid over 10 million tonnes of CO₂ by 2032.
Awards & Recognition
Partner with us
Find out more about our technology, how we partner with the steel and concrete industry, and our innovative SCM, LoopCem™.
Cocooncarbon Ltd.
Unit 1, The Hub@55
55 Gorst Rd
NW10 6LS
Privacy Policy
Partner with us
Find out more about our technology, how we partner with the steel and concrete industry, and our innovative SCM, LoopCem™.
Cocooncarbon Ltd.
Unit 1, The Hub@55
55 Gorst Rd
NW10 6LS
Privacy Policy
Partner with us
Find out more about our technology, how we partner with the steel and concrete industry, and our innovative SCM, LoopCem™.
Cocooncarbon Ltd.
Unit 1, The Hub@55
55 Gorst Rd
NW10 6LS
Privacy Policy
