Carbon-Negative Concrete Development for Sustainable Construction

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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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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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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Cementitious binder comprising precipitated lime and at least one pozzolan, which provides a cement with reduced embodied carbon emissions compared to conventional portland cement. The binder comprises precipitated lime and at least one pozzolan, which are produced using a process with substantially reduced CO2 emissions to the atmosphere due to the consumption of fossil fuels. The pozzolan may be produced using a process with substantially reduced chemical CO2 emissions to the atmosphere, meaning CO2 emissions originating from chemical reactions involved in synthesizing the material.

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Carbon dioxide capture using cement-based materials that can be integrated into concrete structures. The cement composition comprises a porous inorganic material, a metal oxide, and a silica compound. The cement composition is prepared by combining the porous inorganic material with the metal oxide and silica compound, with average particle sizes less than 100 microns. This cement composition can be used as a concrete admixture to enhance CO2 absorption and mineralization within concrete.

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A novel concrete additive that reduces CO2 emissions during production while maintaining structural integrity. The additive comprises biochar particles with a grain size range of 10-30 mm, which when incorporated into cement-based concrete, achieves improved flowability and stability while maintaining sedimentation characteristics. The biochar particles are specifically engineered to prevent premature settling of the mixture, ensuring consistent flow and pumping properties. This additive enables a significant reduction in CO2 emissions compared to traditional cement-based concrete formulations, making it an attractive solution for sustainable building construction.

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A concrete with enhanced CO2 capture capabilities using waste materials as aggregate. The concrete combines waste incineration bottom ash, concrete waste powder, and industrial residue to create a superior aggregate with enhanced carbon fixation properties. The waste materials, particularly the incineration bottom ash, exhibit high CO2 absorption capabilities, while the concrete waste powder and industrial residue contribute to enhanced hydration and pozzolanic activity. The resulting concrete achieves superior CO2 absorption under natural conditions, with solid calcium carbonate generated during carbonization.

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Permeable concrete with enhanced CO2 absorption capabilities through a synergistic approach involving multiple solid waste materials. The innovative preparation method integrates fly ash and calcium carbide slag into the cement matrix, where wet grinding and high-temperature treatment of the raw materials produces a CaAl-LDH (calcium aluminum hydrotalcite) suspension. This suspension enhances CO2 absorption by forming a stable, anion-exchangeable layer in the cement matrix, while its interaction with CO2 triggers a series of chemical reactions that further increase CO2 absorption capacity. The resulting permeable concrete exhibits improved mechanical properties and enhanced CO2 absorption performance compared to conventional pervious concrete.

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Carbonation curing of concrete by introducing a lixiviant compound that facilitates the release of calcium ions from calcium-containing minerals, enabling accelerated curing of the resulting carbonated concrete. The lixiviant, which can be a biologically derived organic amine, releases calcium ions from silicates and oxides, allowing the formation of calcium carbonate through reaction with CO2. This process enables carbonation curing at lower CO2 concentrations and pressures compared to traditional methods, while sequestering significant amounts of CO2. The lixiviant acts as a catalyst, enabling the use of small amounts of lixiviant relative to calcium content, and can be formulated to release calcium ions in substoichiometric amounts relative to the concrete mixture.

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A method for carbon sequestration in concrete through controlled carbon absorption and fixation using porous aggregates. The process involves pretreating aggregate with CO2, followed by controlled carbonization and drying to produce a modified porous aggregate. This modified aggregate retains CO2 within its pores while maintaining structural integrity, enabling effective carbon sequestration without compromising concrete reinforcement. The modified aggregate can be used in concrete applications, enhancing carbon absorption and reducing environmental impact.

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High carbon absorption early strength cementitious material based on recycled concrete powder and biochar, with enhanced carbonation potential through controlled regeneration and biochar integration. The material combines the high calcium content of recycled concrete with biochar, enabling efficient carbon absorption through percolation networks. The controlled regeneration process regulates the ratio of concrete powder to biochar, while the directional induction heating and cooling system optimizes the sintering process. The resulting material exhibits improved early strength development and carbon absorption compared to conventional cement-based materials.

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A cement-based material carbon-fixing internal curing agent that enhances concrete durability through controlled internal moisture management. The agent combines a biochar component with conventional light aggregates and superabsorbent resins to create a unique internal curing system. Biochar's developed pore structure and water-holding capacity enable controlled water absorption, while superabsorbent resins provide enhanced water retention. This combination enables improved concrete strength and durability, particularly in low-water-cement-ratio applications, by preventing early self-shrinkage and cracking.

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Low-carbon concrete segment for tunnel construction that incorporates a reinforced cage within a carbon-neutral concrete matrix. The segment features a reinforced cage with bolt holes, strategically positioned to facilitate segment assembly while maintaining structural integrity. The concrete matrix contains specific additives to enhance carbonization resistance and reduce CO2 emissions during curing. The reinforced cage provides mechanical support to the segment while the concrete matrix absorbs CO2 through carbonization. The assembly can be connected through bolts, forming a tube structure. The reinforced cage enables efficient segment assembly while maintaining the structural integrity of the concrete matrix.

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Eco-friendly concrete block and manufacturing method that enables permanent storage of collected materials through a novel carbon dioxide capture and manufacturing process. The method involves integrating carbon dioxide capture into the cement manufacturing process by incorporating CO2-trapping agents, such as nano-silica, into the cement matrix. This integrated approach enables the capture and utilization of CO2 while maintaining the structural integrity and workability of the concrete blocks. The CO2-trapping agents are specifically designed to prevent re-adsorption and agglomeration, ensuring optimal performance and preventing material degradation.

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High-performance low-carbon concrete that reduces CO2 emissions while maintaining superior mechanical properties. The concrete combines a cementitious matrix with supplementary materials to achieve significant reductions in carbon footprint. The formulation includes a cement-based matrix, supplementary cementitious materials, water-reducing agents, and recycled aggregate. The supplementary materials, particularly the nano-sodium dioxide dispersion, significantly enhance the concrete's carbon sequestration capabilities. The resulting concrete exhibits improved durability, thermal insulation, and reduced environmental impact compared to conventional Portland cement concrete.

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Macroporous cement concrete with enhanced CO2 adsorption capabilities through the incorporation of fursanite and pyroxene, which form a synergistic reaction with calcium and magnesium oxides to create a highly efficient CO2 capture system. The concrete's macroporous structure allows for the adsorption and retention of CO2 and sulfur dioxide, while its geopolymer binder enhances its mechanical properties. This innovative cement concrete combines the benefits of both cement and geopolymer systems, providing a practical solution for CO2 reduction and air purification in construction applications.

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A method for producing building materials with enhanced carbon capture and strength through a combined carbonization and carbonation process. The method involves carbonizing the building material components in a CO2-rich atmosphere, followed by carbonation of the resulting material. This multi-step process enables the formation of stable carbonates that can be incorporated into the final product, significantly increasing its carbon sequestration potential while maintaining superior mechanical properties.

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Cement conglomerate with enhanced fire resistance and environmental sustainability, comprising a mixture of cement, fine aggregates, and activated carbon. The cement contains a controlled amount of mineral additions and activated carbon, which are combined to create a fire-resistant concrete that meets stringent environmental regulations while maintaining structural integrity. The activated carbon is specifically activated through thermal treatment, ensuring its CO2 capture properties are retained. This innovative combination addresses the challenges of conventional fire-resistant concrete by combining the benefits of mineral additions and activated carbon in a single cement product.

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Manufacturing concrete products with enhanced carbon sequestration capabilities through a novel approach that integrates carbon dioxide capture from industrial flue gas into building materials. The process involves incorporating carbonized building material powder into concrete production, where it reacts with industrial CO2 emissions to form a permanent carbon storage material. This integrated approach enables both waste reduction and CO2 mitigation while producing concrete products. The technology addresses the environmental challenges of industrial emissions while creating a sustainable alternative to traditional concrete production methods.

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