Self-compacting concrete (SCC) presents unique rheological challenges, requiring precise control of yield stress (typically 50-200 Pa) and plastic viscosity (20-100 Pa·s) to achieve both flowability and stability. Field measurements show that minor variations in aggregate gradation or moisture content can shift these parameters significantly, affecting the concrete's ability to flow under its own weight while maintaining homogeneity.

The fundamental challenge lies in balancing the competing requirements of high fluidity for placement and sufficient cohesion to prevent segregation during flow and consolidation.

This page brings together solutions from recent research—including optimized additive systems for aggregate cohesion, controlled shear thickening/thinning mechanisms, and novel viscosity-modifying agents like locust bean gum. These and other approaches focus on achieving reliable SCC performance across varying site conditions and applications while maintaining predictable rheological behavior.

1. Concrete Composition with Specific Cementitious and Additive Ratios for Enhanced Fluidity and Stability

BEIJING YANTONG BUILDING COMPONENT CO LTD, Beijing Yantong Construction Components Co., Ltd., 2024

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.

CN116161928B-patent-drawing

2. Self-Compacting Concrete with Additive System for Enhanced Aggregate Cohesion and Cement Hydration

GUANGZHOU TONGYI CONCRETE CO LTD, 2024

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.

3. Self-Compacting Concrete Composition with Optimized Aggregate Mixture and Additives for Enhanced Flowability and Homogeneity

CHANDIGARH UNIVERSITY, 2024

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.

4. Concrete Composition with Enhanced Flowability and Segregation Resistance for Slab Ballastless Track Applications

CHENGDU HUGE CONSTRUCTION MATERIAL CO LTD, 2024

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.

CN118047572A-patent-drawing

5. Self-Compacting Concrete with Copper Acetate-Based Expansion Agent

HANGZHOU SHANXIN CEMENT COMPONENTS CO LTD, 2024

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.

CN117447139A-patent-drawing

6. Self-Compacting Concrete with Engineered Microstructure and Controlled Hydration Parameters

GUANGDONG YONGTAI CONCRETE CO LTD, 2023

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.

CN117263586A-patent-drawing

7. Self-Compacting Concrete Preparation Method Utilizing Sequential Shear Thickener and Thinner Integration

SHANDONG HIGHWAY & BRIDGE CONSTRUCTION GROUP CO LTD, 2023

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.

8. Method for Predicting Rheological Behavior of Self-Compacting Concrete Using Combined Empirical and Mathematical Models

SHANDONG HI SPEED GROUP CO LTD, 2023

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.

9. Concrete Composition with Locust Bean Gum-Based Additive for Enhanced Fluidity and Compressive Strength

BEIJING GANGCHUANG RUIBO CONCRETE CO LTD, 2023

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.

CN116924738A-patent-drawing

10. Concrete Composition with Viscosity-Reducing and Thickening Admixture for Consistent Density and Flowability

SHANGHAI CONSTRUCTION BUILDING MATERIALS TECHNOLOGY GROUP CO LTD, 2023

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.

CN116714100A-patent-drawing

11. Concrete Composition with Fiber Reinforcement and Surface Treatment for Enhanced Durability

DONGGUAN JIANYE CONCRETE CO LTD, 2023

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.

12. Self-Compacting Concrete Preparation Method Using Porous Ceramsite with Organic Material Integration

SHANDONG HIGHWAY & BRIDGE CONSTRUCTION GROUP CO LTD, 2023

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.

CN115893915A-patent-drawing

13. Self-Compacting Concrete with Fly Ash, Maleic Acid, and Hyperbranched Polyester Composite Network

厦门海投建材有限公司, 2023

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.

14. Self-Compacting Concrete Composition with Balanced Additive Proportions for Enhanced Fluidity and Stability

Nanjing Ruide High-tech Co., Ltd., 常州市三级航道网整治工程建设指挥部办公室, CHINA DESIGN GROUP CO LTD, 2022

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.

15. Self-Compacting Concrete Composition with Ultrafine Slag Powder, Bentonite, and Natural Fibers

北京泽华路桥工程有限公司, BEIJING ZEHUA ROAD AND BRIDGE ENGINEERING CO LTD, 2022

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.

16. Concrete Composition with Water-Soluble Microcapsules for Enhanced Flow and Strength

SHAANXI HONGJI CONCRETE COMPONENTS CO LTD, Shaanxi Hongji Concrete Components Co., Ltd., 2022

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.

CN111592304B-patent-drawing

17. Self-Compacting Concrete Composition with Polyacrylamide and Sodium Pyrophosphate Admixture System

HAINAN ZHAOCHENG CONCRETE CO LTD, 2021

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.

18. Self-Compacting Concrete Mix Design with Variable Water Reducing Agent Content for High-Speed Railway Ballastless Track Stability

SHENYANG JIANZHU UNIVERSITY, Shenyang Jianzhu University, 2021

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.

19. Self-Compacting Concrete Incorporating Polycarboxylic Acid-Based Water-Reducing Agent

SHANDONG HONGDA PROPERTIES CO LTD, 2021

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.

CN112939554A-patent-drawing

20. Self-Compacting Concrete Incorporating Sulfoaluminate and Diethylene Glycol Butyl Monoether for Controlled Shrinkage and Hydration Promotion

HANGZHOU QIANSHEN COMMERCIAL CONCRETE CO LTD, 2021

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.

21. Self-Compacting Concrete with Sodium Polyacrylate and Sodium Laurate in Multi-Stage Mixing Process

22. Concrete Composition with Cement Content Reduction Using Compressible Accumulation Model and Ultra-Fine Sand Powder

23. Concrete Composition with Polycarboxylate Comb Polymers and Viscosity-Modifying Agents for Enhanced Flowability and Settlement Properties

24. Self-Compacting Concrete Composition with Fluidity-Enhancing Agent and Urethane-Acrylic Associative Thickeners

25. Concrete Admixture Comprising Diisopropyl Azodicarboxylate, Polyoxyethylene Sorbitan Fatty Oleate, and Nano-Zinc Oxide

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