Superplasticizer Concrete Admixtures for Water Reduction

A highly dispersed polycarboxylate water reducer that combines superior performance with enhanced adaptability. The water-reducing agent comprises a specific mass ratio of polycarboxylate to cement, with a preferred ratio of 3-4:1. This composition enables the water-reducing agent to effectively disperse in cement slurry, while its molecular structure incorporates additional anionic groups such as sulfamic acid and glutaconic acid. These side chains facilitate interactions with cement particles, forming a stable hydration film that enhances cement flow and reduces particle aggregation. The water-reducing agent's molecular structure also enables continuous replenishment of lost acid groups during cement hydration, maintaining optimal hydration conditions and cement dispersion.

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A method for producing cement with reduced water demand through the joint grinding of Portland cement, mineral filler, and organic water-reducing agent. The method combines a carbonaceous material with a calcium carbonate content of at least 60% as a mineral filler with Portland cement, carbonate-containing material, and organic water-reducing agent in specific proportions. The carbonaceous material enhances the cement's hydration properties while maintaining its strength, resulting in a cement with lower water demand and improved durability compared to conventional methods.

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Pourable aqueous dispersion compositions comprising cellulose ethers and superplasticizers in an aqueous medium of stabilizers and monovalent salts. The compositions contain from 8 to 28 wt.%, as solids in total of each of the cellulose ethers and the monovalent salts, and provide water reducers or superplasticizers in liquid form suitable for ready, on-site use with cementitious dry mix.

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A copolymer that enables the creation of hydraulic binders with improved workability and slump retention, particularly in aqueous formulations. The copolymer, comprising a polymolecularity index less than 3, is synthesized through radical polymerization in water at temperatures between 10-90°C. The copolymer incorporates a specific combination of ethylene oxide (EO) and propylene oxide (PO) monomers, with a ratio of EO to PO groups ranging from 98:2 to 52:48. This copolymer formulation enables the reduction of water content in hydraulic binders while maintaining their mechanical properties and workability.

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A castor oil-based superplasticizer for concrete that reduces production costs and environmental impact. The superplasticizer is prepared through catalytic dehydration of castor oil, which replaces traditional acrylic acid-derived monomers. This process enables the production of a high-performance superplasticizer with improved sustainability compared to conventional acrylic-based products. The dehydrated castor oil serves as the monomer in a free radical polymerization reaction, offering a renewable and environmentally friendly alternative to traditional raw materials.

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Comprehensive polycarboxylate water-reducing agent for concrete, comprising isopentenyl polyoxyethylene ether, functionalized 8-cyclodextrin, 2-acrylamide-2-methylpropanesulfonic acid, γ-aminopropyltriethoxysilane, 2-methacryloxyethyltrimethylammonium chloride, methacrylic acid-N,N-dimethylaminoethyl, initiator, N,N-dimethylacrylamide, 3-mercaptopropionic acid, and ascorbic acid. The agent exhibits enhanced water-reducing properties compared to conventional polycarboxylate agents, while maintaining superior cement paste fluidity and slump.

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Polycarboxylate superplasticizer with enhanced adaptability for concrete applications, comprising a modified glycidyl methacrylate that prevents clay particle adsorption through steric hindrance. The modified glycidyl methacrylate, containing β-CD-modified cyclodextrin hollow cylinder structures, effectively prevents cement particles from interacting with clay minerals during hydration, resulting in improved dispersion and uniformity of the superplasticizer in cement systems.

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Low water-binder ratio ultra-high performance concrete with enhanced mechanical properties, achieved through a novel cement-silica fume-fly ash-sand composition. The composition combines cement, silica fume, fly ash, and mineral powder with specific weight ratios, while incorporating a polycarboxylate water-reducing agent and defoaming agent. This formulation enables the production of ultra-high performance concrete with significantly reduced water content, meeting the requirements for high-strength, electrical insulation applications.

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Water-reducing admixture for concrete that enables sustainable production of high-quality concrete with unwashed crushed aggregates containing high amounts of fines. The additive comprises a calcium lignosulfonate and a vinyl copolymer with sugar, which together disperse both cement and fines. The solution provides significant water reduction while maintaining compressive strength, making it an attractive alternative to traditional clay inhibitors and pretreatment methods. The additive is particularly effective for concrete with high cement content and fines exceeding 200 mesh, enabling water reduction of up to 15% while maintaining quality.

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A low-shrinkage, viscosity-reducing polycarboxylic acid water-reducing agent for concrete applications, particularly in high-strength concrete like bridge and dam construction. The agent combines the benefits of conventional water-reducing agents with the improved properties of polycarboxylic acids. The agent is prepared through a controlled reaction between a water-reducing agent and a specific acid, resulting in a product with enhanced flow characteristics and reduced shrinkage. The agent's unique combination of properties enables improved concrete performance in high-strength applications while maintaining safety and quality standards.

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A cement admixture that enhances concrete properties through a synergistic combination of a polycarboxylic acid water reducing agent, a retarder, and Bi (NO3) 2. The admixture contains a polycarboxylic acid water reducing agent, a retarder, Bi (NO3) 2, and water in a specific mass ratio. The polycarboxylic acid water reducing agent achieves water reduction, the retarder improves workability, and Bi (NO3) 2 enhances strength.

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Low-to-mid-range water-reducing cement compositions that achieve water savings through the selective use of comb-type polycarboxylate copolymers. The compositions incorporate these polymers in specific weight ranges within their molecular weight range, which enables effective water reduction in concrete mixes without the high-cost HRWR polymers typically used for this application. The polymers are combined with cement in controlled amounts and can be supplemented with additional water-reducing agents. This approach offers a more cost-effective alternative for achieving water savings in concrete mixes where traditional HRWR polymers are not feasible.

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A binder technology for self-compacting, high-strength concrete that achieves superior mechanical properties through a novel approach. The binder composition incorporates a silica nanomodifier introduced during cement production, which enhances the cement's mechanical properties through enhanced surface activity. The nanomodifier's adsorbed superplasticizer and silica particles form a dense, mechanical bond with aggregate grains, significantly increasing concrete strength and durability. The binder's unique composition enables self-compaction without excessive water demand, while its enhanced mechanical properties make it suitable for heavy, high-strength concrete applications.

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Viscosity-reducing polycarboxylate superplasticizer for concrete with improved flowability. The superplasticizer is prepared through a controlled polymerization process that incorporates a specific molecular structure. This structure enables the formation of a stable, low-viscosity polymer network that enhances concrete flowability while maintaining its strength and durability. The polymerization process is optimized to produce a superplasticizer with the desired rheological properties for concrete applications.

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A concrete superplasticizer for improving workability and setting properties of concrete. The superplasticizer comprises a mixture of a polymer resin and a water-reducing agent, where the water-reducing agent is a compound containing at least one alkali metal hydroxide. The compound is prepared by reacting a polymer resin with an alkali metal hydroxide in the presence of a catalyst.

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A cementitious cementitious material with enhanced rheological properties for concrete applications. The material combines a polycarboxylic acid, naphthalene, and aliphatic water reducing agent in a specific weight ratio to improve the early strength and adaptability of cementitious cementitious mixtures. The compound enhances the rheological properties of the cementitious mixture, enabling improved flowability and workability characteristics before the loss of plastic phase.

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Polycarboxylate water-reducing agent for concrete stabilization, comprising a combination of alkylphenol polyoxyethylene ether, isopentenyl alcohol polyoxyethylene ether, cinnamic acid, octenyl succinic anhydride, 2-acrylic acid, methacrylic acid, isopropyl alcohol, and sodium persulfate. This agent provides improved concrete workability and strength while reducing water content, particularly in high-strength concrete applications.

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A high-performance water-reducing superplasticizer for concrete, comprising a ketone compound, aldehyde compound, monocyclic aromatic hydrocarbon salt compound, and condensed aromatic hydrocarbon salt compound. The superplasticizer achieves superior slump retention and water reduction while maintaining high strength, through the unique combination of a ketone compound, aldehyde compound, aromatic hydrocarbon salt compound, and aromatic hydrocarbon salt compound.

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A novel, cost-effective concrete additive that reduces material costs by replacing traditional superplasticizers and sodosilicate with a novel combination of a polyfunctional sodium salt-based superplasticizer, brown coal waste, and a specific molten metal. This additive achieves superior workability, setting characteristics, and strength properties while minimizing waste generation during production.

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Polycarboxylic acid concrete superplasticizer with improved performance through amide/imidide structure. The superplasticizer is synthesized through copolymerization of unsaturated anhydride and monoalcohol, followed by catalytic esterification and free radical copolymerization. The process involves a controlled reaction sequence that enhances monomer conversion and copolymerization activity.

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An environmentally friendly superplasticizer for concrete that combines enhanced workability, improved durability, and enhanced corrosion resistance. The superplasticizer comprises a combination of superplasticizer, rust inhibitors, defoamers, and an initiator, achieving superior workability and durability properties while maintaining low environmental impact. The formulation includes a potassium persulfate initiator, JK-H20 (a rust inhibitor), and silicone emulsion defoamer to enhance concrete workability and prevent water evaporation. The composition also incorporates a potassium-based superplasticizer that is a third-generation, high-performance water-reducing agent. This innovative formulation addresses common challenges in concrete production while delivering improved performance characteristics compared to traditional superplasticizers.

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Polycarboxylate water-reducing agent for concrete, prepared through controlled dropwise addition process. The agent exhibits superior water reduction (up to 35%) and slump retention, while maintaining optimal pH and solids content. The production process utilizes automated control systems for precise temperature management, ensuring reactor safety and product quality. This innovative method enables flexible and economical production of polycarboxylate superplasticizer, with applications in concrete formulations.

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Polycarboxylic acid type water-reducing agent with enhanced performance characteristics for concrete applications. The agent comprises a quaternary ammonium salt, an ester group, a sulfonic acid group, a carboxyl group, or an amine group, synthesized through radical polymerization. The preparation method enables high-performance, multi-functional, and environmentally friendly water-reducing agents with low dosage requirements, achieving superior cement hydration and dispersion properties while minimizing setting time and waste.

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A water-reducing agent for cement that combines a superplasticizer with an environmentally friendly activator. The agent contains a superplasticizer that achieves high-strength cement hydration while simultaneously reducing cement hydration rate, thereby enabling reduced cement usage. The agent also contains an activator that enhances cement hydration through accelerated hydration kinetics and surface tension reduction. The activator composition is optimized for effective water reduction while maintaining cement strength and durability.

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A water-reducing admixture for cement production that improves workability and strength while reducing water consumption. The admixture combines raw materials including cross-linked condensates, polyethylene glycol, vinegar, and other additives to enhance cement performance. The formulation provides improved workability and strength under normal working conditions while significantly reducing cement water consumption compared to conventional admixtures.

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A low-infiltration, high-water-reducing, and high-plasticizing concrete superplasticizer that addresses the limitations of conventional admixtures. The invention combines a reducing agent with a coagulation-modifying complex to enhance concrete workability and strength while minimizing water consumption. This dual-function additive enables improved coagulation performance without compromising the cement's original properties, while its controlled water-reducing action optimizes concrete mix design.

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A ready-mixed concrete pumping system efficiency polycarboxylate superplasticizer that achieves enhanced performance while maintaining low cost. The agent has a solid content of approximately 13% and a slump water-reducing capacity of 40%, enabling effective concrete mixing and pumping while reducing cement content. The agent's formulation allows for a cementitious material ratio of 0.1-1.6% in the concrete mix, making it suitable for high-performance concrete applications.

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A water-reducing agent for concrete that achieves high water reduction efficiency (>50%) while maintaining excellent slump retention and water resistance properties. The agent is produced through a non-thermal process that enables water reduction without the need for heat. It consists of a poly-carboxylic acid component with specific proportions that provide enhanced water reduction, slump retention, and water resistance characteristics. This agent is particularly useful in concrete applications where water conservation is critical, such as in construction projects requiring precise slump control and water management.

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