Self Compacting Concrete Rheology Optimization

Self-compacting concrete with enhanced workability for wall panel production. The concrete contains a specific ratio of cement, polycarboxylic acid, early strength agent, water, fly ash, crushed stone, sand, and hydroxyethyl cellulose thickener. This composition balances high fluidity and stability, enabling rapid self-compaction while maintaining workability. The thickener enhances concrete flow characteristics without compromising strength. The resulting concrete exhibits superior workability compared to conventional self-compacting concrete, facilitating efficient production of wall panels with minimal retardants.

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A self-compacting concrete that improves workability and bonding between aggregate and cement matrix during concrete production. The invention introduces a novel additive system that enhances aggregate cohesion while maintaining optimal cement hydration conditions. This additive system, comprising a proprietary blend of natural and synthetic components, is specifically formulated to address the challenges of conventional self-compacting concrete formulations. By optimizing aggregate particle cohesion and cement hydration, the additive system enables improved workability and bonding between aggregate and cement matrix, resulting in enhanced concrete performance and reduced segregation.

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Self-compacting concrete (SCC) that eliminates the need for mechanical vibration during placement, enhancing construction efficiency and reducing labor costs. The composition achieves flowability and consolidation under its own weight through optimized cementitious material, fine and coarse aggregate mixtures, superplasticizer, viscosity-modifying agent, and air entraining agent. The composition maintains homogeneity and uniformity during placement and hardening, with superior strength and durability compared to conventional SCC.

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High fluidity self-compacting concrete for filling slab ballastless track in high-speed rail applications. The concrete has improved flowability, segregation resistance, and steel bar penetration compared to standard self-compacting concrete. It allows pouring without vibration into narrow cavities with obstructions. The concrete composition includes optimized ratios of cement, fly ash, silica fume, expansion agent, sand, coarse aggregate, water reducer, and sensitivity modifier.

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Self-compacting concrete with improved mechanical properties through the replacement of aluminum dihydrogen phosphate with copper acetate in the expansion agent. The formulation achieves enhanced compressive resistance while maintaining the required water-cement ratio and sand content. The replacement of aluminum dihydrogen phosphate with copper acetate in the expansion agent enables the concrete to exhibit improved mechanical properties, including higher compressive strength and resistance to cracking.

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Self-compacting concrete that achieves uniform density and strength through controlled mixing and curing processes. The concrete comprises cement, fly ash, expansion agent, water, sand, and gravel, with specific weight percentages and additives. The mixing process is optimized to achieve the optimal hydration time between 3-5 minutes, ensuring uniform hydration and density. The concrete's microstructure is engineered to prevent water seepage and cracking through precise control of cement hydration and expansion agent dosage. The concrete's performance is further enhanced through the use of additives like HNTK-1 viscosity modifier and PCA-VIII water-reducing agent.

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Self-compacting concrete preparation method that enhances workability and concrete properties through controlled shear thinning and thickening effects. The method involves a two-step process where the concrete is prepared with a shear thickener first, followed by a shear thinner. The thickener increases viscosity, while the thinner reduces it. This controlled transition enables improved workability and concrete performance compared to conventional methods. The thickener and thinner agents are combined in a specific order to achieve optimal effects.

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A self-compacting concrete design method that optimizes rheological properties through a unified approach. The method combines empirical and mathematical approaches to predict self-compacting concrete's rheological behavior, including yield stress and plastic viscosity. By analyzing aggregate properties and cement properties, the method calculates the rheological behavior of the self-compacting concrete, enabling rapid optimization of mix proportions. This approach addresses the complex interaction between cement, aggregate, and mortar phases, providing a comprehensive understanding of the self-compacting concrete's rheological properties.

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Self-compacting concrete for rail top air ducts that achieves rapid pumping and high compressive strength through a novel locust bean gum-based additive. The additive enhances the concrete's fluidity immediately after mixing, allowing rapid filling of formwork and wrapping of steel bars. The concrete exhibits superior compressive strength upon curing, meeting the requirements for rail top air ducts. This innovative additive enables efficient construction of these critical components while maintaining high performance throughout the curing process.

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High-strength, low-viscosity thickened self-compacting concrete that maintains consistent density and flowability even under high fluidity and low viscosity conditions. The concrete combines cementitious material, a viscosity-reducing and thickening admixture, and specific aggregate compositions to achieve optimal performance. The preparation method involves precise optimization of cement-to-aggregate ratios, admixture-to-cement ratios, and aggregate-to-liquid ratios to achieve the desired properties.

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Self-compacting concrete for bridge construction that improves durability and maintenance resistance through enhanced fiber reinforcement. The innovative concrete formulation combines fly ash, slag, and silicon micropowder with a surface treatment agent to improve fiber bonding and reduce fiber degradation. The treatment agent forms a protective coating on the fiber surface, enhancing its performance in self-compacting concrete while preventing fiber degradation. This formulation enables bridge decks to maintain their structural integrity even under harsh environmental conditions, reducing maintenance requirements and improving overall bridge performance.

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A self-compacting concrete preparation method that enhances durability through controlled porosity management. The method involves creating a porous ceramsite through a controlled sintering process that incorporates organic materials like straw debris, nano-calcium carbonate, and chitosan. The ceramsite is then impregnated with chitosan, which enhances its adsorption properties while opening closed pores during sintering. This results in a self-compacting concrete with improved mechanical properties, enhanced water absorption capacity, and enhanced bonding between cement, aggregates, and organic materials.

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Self-compacting concrete that enhances its mechanical properties through a novel combination of fly ash, maleic acid, and hyperbranched polyesters. The concrete formulation incorporates a specific ratio of fly ash, maleic acid, and hyperbranched polyesters that enables the formation of a stable inorganic-organic composite network skeleton. This network structure provides superior load transmission and compressive strength, while maintaining enhanced tensile strength and reduced shrinkage compared to conventional self-compacting concrete.

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Low cementitious self-compacting concrete with improved workability and durability. The composition comprises a balanced mix of slaked lime, sodium hydroxide, propionate milk, acrylic acid ester copolymer emulsion, and water, with specific proportions of additives to enhance the concrete's fluidity and stability. The formulation achieves a balance between high fluidity and high stability, enabling self-compaction while maintaining mechanical properties and durability.

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High-strength self-compacting concrete with enhanced durability through improved workability and shrinkage control. The concrete combines cement, fly ash, ultrafine slag powder, bentonite, and natural fibers to achieve exceptional workability and self-shrinkage properties. The formulation includes a water-reducing agent, expansion agent, and specific surface area-enhancing ultrafine slag powder to optimize concrete performance. The natural fiber content can be adjusted to achieve optimal strength and durability. The concrete's unique composition enables it to fill complex shapes without vibration, making it suitable for critical infrastructure applications like foundations and high-performance concrete structures.

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Self-compact concrete with improved fluidity and strength properties. The concrete incorporates microcapsules that dissolve in water, creating a network effect that enhances concrete flow while maintaining its strength. The microcapsules are prepared through a controlled process involving sieving of the raw materials, followed by addition of the microcapsules to the concrete mixture. This controlled release of microcapsules enhances the concrete's self-compactability while maintaining its mechanical properties.

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Self-compacting concrete with improved workability and durability through a novel admixture system. The concrete combines cement, polyacrylamide, sand, crushed stone, iron slag, sodium pyrophosphate, fly ash, mineral powder, and admixtures with specific additives. The formulation provides enhanced workability and resistance to vibration-induced defects, while maintaining high compressive strength.

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Designing self-compacting concrete mix for high-speed railway ballastless track structures that meets stability requirements through optimized mix composition. The method involves analyzing the relationship between self-compacting concrete stability and its constituent properties, specifically the water reducing agent content, to determine the optimal mix design parameters. This approach enables the creation of self-compacting concrete mixes that meet the stringent requirements of CRTS-type ballastless track structures, particularly in high-speed railway applications where precise control of the filling layer is critical for track stability and durability.

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Self-compacting concrete with enhanced performance through a novel water-reducing agent. The agent achieves a water-reducing rate of 16.5% through a polycarboxylic acid type, enabling self-compacting concrete without traditional water-reducing agents. This agent is compatible with conventional cement, fly ash, and slag, and can be used in conventional mixing processes. The resulting self-compacting concrete exhibits improved workability and reduced labor requirements compared to conventional self-compacting concrete.

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Self-compacting concrete with enhanced strength, durability, and flow characteristics through the addition of a shrinkage reducing agent. The agent, comprising sulfoaluminate and diethylene glycol butyl monoether, promotes hydration of cement, fly ash, and mineral powder, while simultaneously controlling shrinkage. This combination enables the concrete to achieve improved flow properties, complete formwork filling, and enhanced anti-cracking performance, while maintaining the self-compacting characteristics of conventional concrete.

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