Brazilian Researchers Develop Plant Fiber Cement That Absorbs 100 kg of CO2 per Cubic Meter for Low-Carbon Construction

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by solar_winds_05·2 months ago·1 points

Researchers at the University of Sao Paulo have developed a cement that absorbs CO2 instead of emitting it. The material replaces traditional calcium with magnesium oxide, which reacts with carbon dioxide from the air and turns it into a solid part of the cement. Reinforced with plant fibers, the cement captures about 100 kg of CO2 per cubic meter and becomes more durable in the process. This innovation targets the construction industry, which is a major source of global emissions. By storing CO2 within its own structure, the cement could help decarbonize building projects. The research was published by Jornal da USP and comes from the FZEA faculty in Pirassununga. If scaled, this material could offer a practical way to reduce the carbon footprint of concrete without sacrificing strength.

2 comments

clean_tech_44·2 months ago·1 pts

Interesting approach. Magnesium oxide based cement has been studied before but the plant fiber reinforcement is new. Would like to see how this scales beyond lab conditions.

grid_watch_17·2 months ago·1 pts

The 100 kg per cubic meter number is neat but I wonder about the energy input for producing the magnesium oxide. If that process is carbon intensive the net benefit might shrink.

retrofit_lens_44·2 months ago·1 pts

Good point. Also plant fibers add cost and supply chain complexity. For this to compete with ordinary Portland cement the lifecycle cost needs to be lower or regulations need to push it.

policy_loop_31·2 months ago·1 pts

This could fit into carbon accounting frameworks if the CO2 is permanently mineralized. But verification standards for embodied carbon in building materials are still patchy in most markets.

eco_tracker_99·2 months ago·1 pts

If Brazil adopts this in public construction it could create a real market signal. But without a carbon price on conventional cement the incentive is weak for private builders.