Carbon Capturing Concrete for CO2 Sequestration

Low-carbon mass concrete and preparation method that achieves significant reduction in carbon emissions and waste generation through innovative aggregate and admixture combinations. The method involves the use of a novel blend of perlite particles with specific size distributions, combined with a crosslinking agent that forms a liquid crystal elastomer solution. This solution is then grafted onto the perlite particles to create a unique material with enhanced thermal insulation properties. The resulting concrete exhibits improved durability and crack resistance, while maintaining the required workability and slump characteristics.

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Concrete admixture for improved durability through enhanced carbon capture, exposure resistance, and sulfate attack resistance. The admixture comprises ground blast furnace slag (30-75%), ferronickel slag (20-50%), and molten sulfur (5-25%), with specific surface area of 3200-4400 cm2/g and a density of 2.8-3.1 g/cm3. The composition achieves optimal performance while maintaining cement content between 5-15% and fine aggregate content between 35-42%.

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Low-carbon cement that replaces conventional Portland cement while maintaining compatibility with existing systems. The cement contains a water-reducing superplasticizer, achieving high water reduction rates (over 40%), improved 28-day shrinkage, and enhanced compressive strength. The cement formulation enables reliable use in current production processes while minimizing carbon emissions.

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Biochar regeneration concrete that improves carbon fixation efficiency through low-oxygen pyrolysis of agricultural waste biomass. The concrete combines cement, biochar, natural sand, recycled aggregate, and water, with specific surface area and pore volume characteristics optimized for CO2 adsorption. The biochar is produced through low-temperature pyrolysis of agricultural waste biomass, achieving a high pore volume and surface area while maintaining a stable composition. The resulting concrete exhibits enhanced carbon sequestration capabilities through improved CO2 adsorption and compressive strength.

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A carbon-negative concrete that can actively absorb and mineralize atmospheric carbon dioxide during curing, achieved through a novel composition and manufacturing method. The concrete composition comprises a geopolymeric binder phase and an algae additive for enhanced carbon mineralization. The binder phase is formed by combining algae biomass that has been dried and pulverized into a fine powder with a geopolymer precursor to produce a binder phase. The algae powder is incorporated into this geopolymeric binder phase along with coarse and fine aggregates before curing. Through both the reduced reliance on traditional Portland cement and the inclusion of the carbon-mineralizing algal biomass, the disclosed concrete system exhibits significantly lower carbon footprints compared to conventional concretes.

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Biochar concrete with enhanced mechanical properties through controlled pyrolysis conditions. The method involves pyrolyzing biomass in an oxygen-limited environment at temperatures between 280°C and 320°C to produce biochar with specific pore sizes and surface characteristics. The biochar is then mixed with cement, mineral powder, and fiber admixture in a controlled ratio to produce a composite cement admixture. The biochar's unique pore structure, combined with its controlled pyrolysis conditions, enables improved mechanical performance of biochar concrete while maintaining its potential for carbon sequestration.

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A green low-carbon recycled concrete material that achieves improved mechanical properties through enhanced alkali-activated fly ash (FA) content and particle size reduction. The material combines the benefits of reduced carbon footprint from volcanic ash waste with improved concrete performance characteristics. The preparation method involves optimizing FA content and particle size reduction through controlled steam curing and alkali activation, enabling the production of high-performance recycled concrete that meets stringent sustainability requirements.

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Concrete incorporating waste concrete fines as a cement substitute through carbon dioxide adsorption, achieving enhanced durability and environmental benefits. The process involves recycling waste concrete from demolished structures, specifically electric poles, into a fine powder with high carbon dioxide adsorption capacity. The powdered material is then mixed with cement and water to form a concrete with improved mechanical properties, enabling enhanced durability and resistance to environmental degradation. The adsorption capability enables the concrete to absorb CO2, reducing its carbon footprint while maintaining structural integrity.

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Cement compositions that capture CO2 from the atmosphere through enhanced mineralization. The compositions comprise a combination of pozzolanic materials, metal oxides, and silica/carbonate compounds that work together to increase CO2 absorption capacity. The materials are specifically engineered to have high surface areas and reactivity, enabling them to effectively capture CO2 from ambient air. The compositions can replace conventional cement in concrete applications, enabling structures to sequester CO2 directly from the atmosphere while reducing environmental impact.

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A crack-resistant low-carbon high-performance concrete developed to reduce cement consumption while maintaining superior workability. The concrete combines limestone-calcined clay cement (LCC) with a water-reducing agent, activated carbon fiber, and graphene oxide, all processed into a uniform blend. The LCC cement replaces traditional cement in the concrete mix, while the water-reducing agent enhances the concrete's workability. The activated carbon fiber and graphene oxide provide enhanced durability and resistance to alkali aggregate reaction. This innovative combination enables significant water savings while achieving improved concrete performance.

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Biochar cement for construction applications that combines carbon sequestration with structural integrity. The cement is prepared by mixing biochar and cellulose in a specific ratio and then incorporating them into cement matrix. The biochar enhances carbon capture while the cellulose solidifies the carbon within the cement, creating a material that not only reduces greenhouse gas emissions but also provides improved mechanical properties.

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Carbon-fixing concrete that combines enhanced mechanical properties with superior carbon sequestration capabilities. The concrete incorporates nano-modified foaming agents into its cementitious matrix, creating ultra-lightweight and porous structures that facilitate CO2 diffusion. This innovative approach enables the concrete to achieve high carbon sequestration rates while maintaining superior mechanical performance compared to traditional carbon-fixing methods.

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A low-carbon concrete that captures CO2 through comprehensive absorption of all its components, enabling carbon neutrality or even negative carbon emissions. The innovative approach integrates multiple CO2-absorbing agents, including solid carbon dioxide, into the concrete matrix, maximizing absorption through synergistic interactions. The preparation method incorporates hollow glass beads and an aqueous solution that enhances CO2 capture, while the aggregate and sand components are optimized for enhanced absorption. This comprehensive approach enables the production of low-carbon concrete with superior durability performance compared to traditional carbon-neutral concrete solutions.

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Carbon-absorbing and carbon-fixing concrete through a novel approach that integrates micro-nano carbon dioxide bubbles into the concrete mixture. The bubbles, comprising carbon dioxide and sodium hydroxide, are incorporated into the concrete through a unique mixing process that creates a supersaturated solution containing high concentrations of carbon dioxide. This supersaturated solution reacts with sodium hydroxide to form sodium carbonate, creating a stable carbon dioxide-rich environment within the concrete. The supersaturated solution is then incorporated into the concrete mixture, where it reacts with sodium hydroxide to form sodium carbonate, effectively fixing carbon dioxide within the concrete structure.

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Cement blends that significantly reduce greenhouse gas emissions through the use of decarburized lime and pozzolans. The blends combine decarburized lime with pozzolans and optional additional components to produce cement with minimal CO2 emissions. The decarburized lime can be produced through a process that captures CO from combustion sources and atmospheric emissions. The resulting cement blends have lower than usual CO2 emissions compared to conventional Portland cement, making them suitable for applications where environmental sustainability is a priority.

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Carbonized phase change concrete with enhanced water resistance and frost resistance, comprising a combination of low-carbon silicate clinker, coarse aggregate, fine aggregate, and controlled phase change agent. The carbonized phase change concrete achieves superior performance through its unique pore structure and interface characteristics, which improve its durability in wet environments. The carbonization process absorbs carbon dioxide, sequestering it and reducing the concrete's carbon footprint. The phase change agent and regulator optimize the concrete's microstructure, while the water-reducing agent minimizes water absorption. The resulting concrete exhibits improved mechanical properties, including compressive strength, and enhanced resistance to freeze-thaw cycles.

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Curable cement composition containing cement, water, fine aggregate, coarse aggregate, and biochar. The composition reduces carbon emissions through the use of biochar, which is incorporated into the cement mixture at a concentration of 5-100 kg/m3. The biochar functions as a carbon dioxide fixation material, reducing emissions from cement production. The composition also incorporates biochar as a bleeding reducing agent, drying shrinkage suppressant, and ammonia gas emission controlling material, providing improved workability and durability characteristics.

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Biochar foam concrete with enhanced carbon sequestration performance through efficient carbon capture and utilization. The invention integrates biochar, a renewable resource, into foam concrete production to create a material with superior carbon retention capabilities. The biochar is incorporated into a foam concrete slurry, where it forms a stable biochar foam that maintains its carbon storage properties throughout the material's lifecycle. This biochar foam structure prevents rapid carbon encapsulation, allowing the material to achieve higher carbon sequestration efficiency compared to conventional cement-based materials.

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A gelling material that absorbs carbon dioxide through a novel preparation method. The material is prepared by calcining red mud at high temperature (600°C) for a specific duration, followed by the addition of a controlled amount of a specific polymer. This process enables the production of a gelling material with enhanced CO2 absorption capabilities, while maintaining its structural integrity and mechanical properties. The material can be used as a supplementary cementitious material in concrete applications, offering a sustainable alternative to traditional carbon capture technologies.

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Carbon-neutral concrete incorporating CO2-derived carbon black for improved mechanical and durability properties, enabling sustainable infrastructure development. The concrete incorporates carbon black particles sequestered from CO2, achieving a low carbon footprint while maintaining high compressive strength. The carbon black particles control flow properties, enabling 3D printing of complex geometries that would otherwise be challenging with traditional methods. This innovative approach enables the creation of sustainable concrete solutions for infrastructure development.

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