Carbonation turning the fine fraction into a cement substitute
Crushing concrete produces a fine fraction that has always been the industry's problem, too variable for concrete sand and often landfilled at cost despite being part of the material the operator was paid to take. Treating those fines with carbon dioxide forms calcium carbonate on the particle surfaces, producing a reactive material that can substitute for a portion of cement while permanently storing the gas. Cement producers are qualifying it because their own decarbonisation targets are otherwise very difficult to meet. That converts a disposal cost into the highest value output the industry has.
Market Impact: Grows 9.2% annually across India








