Modern concrete structures face extreme thermal challenges, with building fires reaching temperatures of 1000°C within 30 minutes. Standard concrete mixtures begin to lose structural integrity at 300°C, with significant strength degradation occurring through spalling and internal decomposition reactions. Recent testing shows that incorporating specialized aggregates and mineral admixtures can extend concrete's thermal stability up to 1050°C for two hours.

The fundamental challenge lies in balancing thermal resistance with mechanical strength while maintaining practical workability and cost-effectiveness in real-world applications.

This page brings together solutions from recent research—including refractory fiber reinforcement systems, alumina-based mineral admixtures, specialized aggregate compositions, and nano-polyacrylonitrile fiber integration. These and other approaches focus on creating concrete mixtures that maintain structural integrity during fire events while remaining feasible for large-scale construction projects.

1. Concrete Composition with Refractory Fiber and Corrosion-Resistant Agent

JIANGSU ZHONGHE HUAXING ENGINEERING TESTING CO LTD, 2025

Fire-resistant and corrosion-resistant concrete for chemical storage tanks, comprising cement, fly ash, slag powder, coarse aggregate, fine aggregate, refractory fiber, corrosion-resistant agent, and water. The concrete formulation combines the conventional components with a specific ratio of cement, fly ash, slag powder, and aggregate to achieve both fire resistance and corrosion resistance. The formulation enables the use of conventional concrete materials while meeting the stringent requirements for chemical storage tanks.

CN119461956A-patent-drawing

2. Ultra-High Performance Concrete with Mineral Admixtures and Alumina Powders for Enhanced Thermal Stability

Hunan University, HUNAN UNIVERSITY, 2024

Fire-resistant and explosion-resistant ultra-high performance concrete (UHPC) with enhanced fire resistance and durability. The concrete contains a specific blend of mineral admixtures and alumina powders with controlled particle sizes, along with a high-strength cement with silica fume and fly ash. The blend provides superior thermal stability and mechanical performance under high-temperature conditions, while maintaining high compressive strength and resistance to expansion. The concrete's unique composition enables prolonged fire resistance, including prolonged exposure to temperatures up to 1050°C for 2 hours, without compromising its structural integrity.

3. Ultra-High Performance Concrete Composition with Bauxite, Mullite, and Zirconia Sand

HUNAN UNIVERSITY, Hunan University, 2024

A fire-resistant ultra-high performance concrete (UHPC) that combines enhanced thermal stability with improved structural integrity. The concrete contains a specific combination of bauxite, mullite, and zirconia sand, with a bauxite content of 600-1300 parts per thousand, mullite content of 50-500 parts per thousand, and zirconia sand content of 0-500 parts per thousand. The bauxite provides a strong skeleton framework, while the mullite enhances thermal resistance through its high-temperature refractory properties. The zirconia sand contributes to the concrete's thermal stability and mechanical strength. The cement used in the formulation has high compressive strength, flexural strength, and specific surface area. The concrete's unique composition enables it to resist thermal shock and maintain structural integrity even in extreme fire conditions.

CN115925352B-patent-drawing

4. Method for Producing High-Temperature Sintering Refractory Concrete with Specialized Aggregates and Ultra-Fine Minerals

UNIV CHINA MINING & TECH, 2024

Preparation method for high-temperature sintering refractory concrete that addresses the critical issue of concrete brittleness and deterioration under extreme temperatures. The method employs a novel approach to enhance fire resistance by incorporating specialized aggregates and ultra-fine minerals into the concrete matrix. These additives, combined with a proprietary sintering process, create a concrete that maintains its mechanical strength even at elevated temperatures, significantly reducing the risk of catastrophic failure during fire events.

CN117361961A-patent-drawing

5. Concrete Composition with Aluminum Hydroxide, Antimony Trioxide, Ammonium Polyphosphate, and Seaweed-Based Reinforcement

BEIJING ZEHUA ROAD AND BRIDGE ENG CO LTD, 2023

Flame-retardant concrete for high-rise buildings that maintains structural integrity during fires. The innovative composition combines aluminum hydroxide, antimony trioxide, and ammonium polyphosphate to create a fire-resistant concrete. The aluminum hydroxide enhances fire retardancy through its endothermic effect, while the antimony trioxide forms a glass layer that protects against thermal degradation. The ammonium polyphosphate, released during fire heating, expands to fill cracks and maintain concrete strength. The seaweed-based reinforcement provides mechanical support, while the polyurethane resin and carbon nitride components further enhance the fire-resistant properties.

6. Refractory Concrete with Nano-Polyacrylonitrile Fiber Reinforcement and Specialized Water-Reducing Agent

JIANGSU ZHAOJIA CONSTRUTION MATERIAL TECHNOLOGY CO LTD, 2023

High refractory concrete with enhanced fire resistance and explosion-proof properties achieved through the incorporation of nano-polyacrylonitrile fibers into the concrete matrix. The fibers, combined with a specialized water-reducing agent, significantly improve the concrete's durability and resistance to thermal shock and chemical attack. This innovative approach enables the creation of concrete with improved fire resistance, while maintaining its structural integrity and workability. The fibers penetrate the aggregate gaps, creating a denser, more stable structure that withstands extreme temperatures and chemical exposure.

CN116332586A-patent-drawing

7. Cement Mortar Composition with Fire-Resistant and Thermal Insulating Additives

TIANYUAN CONSTRUCTION GROUP CO LTD, 2022

A fire-resistant and flame-retardant cement mortar for building construction that combines enhanced thermal insulation performance with improved mechanical properties. The mortar contains crushed stones, cement, sand, fly ash, latex powder, and water, with specific proportions of water-reducing agents, fiber-modified silica sol, viscosity modifiers, foaming agents, calcium stearate, and sodium methyl silicate. The formulation achieves both thermal insulation and fire resistance while maintaining a low cost profile.

8. Concrete Composition with Reinforcement Materials and Additives for Enhanced Thermal Stability

XIEXIAN QINGZHANG CEMENT MANUFACTURING CO LTD, 2022

High-temperature resistant concrete with enhanced thermal stability through a novel composition and preparation approach. The concrete formulation combines cement, fly ash, mineral powder, volcanic rock, slag, coal-to-oil, microsilica, polycarboxylate, and specific additives to achieve superior thermal resistance beyond conventional concrete. The formulation incorporates advanced reinforcement materials like carbon fiber, graphene, and titanium carbide, along with specific chemical additives to enhance thermal stability. The preparation method involves precise blending of these components to create a high-performance concrete with exceptional thermal resistance.

9. Prefabricated Composite Concrete Wall Panel with Refractory Components and Unburned Carbon Particles

JIANGXI OCEAN WILLE IND CO LTD, 2022

Fire-resistant prefabricated integrated composite concrete wall panel and preparation method that addresses the limitations of traditional fire-resistant materials. The panel comprises a composite of refractory components including fly ash, calcium carbide slag, and ceramsite, with wood pulp fibers and polystyrene particles. The preparation method involves a specific sequence of mixing and processing the refractory components, followed by the addition of water and a hydrophobic agent. The resulting composite material exhibits enhanced fire resistance through the incorporation of unburned carbon particles in the fly ash, which improve the material's mechanical strength and thermal insulation properties.

CN114380552A-patent-drawing

10. Concrete Composition with Heat-Resistant and Fire-Resistant Additive Integration

GUANGZHOU ZHONGCHUANG CONSTRUCTION TECHNOLOGY CO LTD, 2021

Concrete with enhanced fire resistance through optimized raw material composition. The concrete combines specific proportions of heat-resistant and fire-resistant components to achieve superior thermal performance after exposure to flames. The composition includes a pre-mix of cement, aggregate, and fire-resistant additives, which are formulated to balance thermal stability with workability and durability.

CN113698157A-patent-drawing

11. Concrete Composition with Flame Retardant and High-Temperature Resistant Additives

ZHAOYANG HU, 2021

Flame-retardant and high-temperature resistant concrete with enhanced fire protection properties. The concrete composition comprises cement, clay, water, water-reducing agent, flame retardant, surfactant, and additives. The flame retardant combination of Australian chemical epoxy resin, magnesium hydroxide, antimony trioxide, boric acid, p-chloro-m-xylenol, and potassium iodide provides superior fire resistance while maintaining high compressive strength. The surfactant enhances the concrete's workability and bonding properties. This innovative combination enables the creation of a concrete with enhanced fire resistance and thermal stability, particularly suitable for high-performance building applications.

CN113277785A-patent-drawing

12. Concrete Composition with Nano Clay and Reinforcement Fibers for Thermal and Fire Resistance

NANTONG GUOSHI COMMERCIAL CONCRETE CO LTD, 2021

High-temperature resistant, flame-retardant, and explosion-proof concrete that provides enhanced thermal stability and fire resistance. The composition includes cement, stones, fly ash, gravel, nano clay, reinforcement fibers, modified rubber, flame retardant, water-reducing agent, adhesive, mineral fillers, and water. The nano clay component is specifically engineered to enhance thermal resistance while maintaining mechanical properties. The formulation combines these components in a controlled ratio to achieve the desired performance characteristics.

CN113121174A-patent-drawing

13. Concrete Composition with Advanced Cement Matrix and Thermal-Resistant Aggregates

JIAHE YONGFENG CONCRETE CO LTD, 2021

Fire-resistant and heat-resistant concrete for high-temperature environments, comprising a novel combination of advanced cement formulations and aggregate materials that enhance thermal stability and structural integrity. The concrete combines a high-performance cement matrix with specialized aggregates that resist thermal expansion and contraction, while incorporating novel additives that prevent thermal shock and micro-cracking. This results in a concrete that maintains its structural integrity and thermal insulation properties even under extreme high-temperature conditions.

14. Method for Producing Concrete with Optimized Aggregate Selection and Admixture Integration for Enhanced Thermal Resistance

WUHAN HUAQIANG NEW BUILDING MAT CO LTD, 2020

A method for preparing heat-resistant and fire-resistant concrete that balances thermal performance, construction quality, and economic feasibility. The method involves optimizing aggregate selection, cementitious material proportions, and admixtures to achieve a precise balance of thermal resistance and workability. The concrete is prepared through a multi-step process that includes selecting appropriate aggregate sizes, mixing the dry material with water, and incorporating a water-reducing agent to improve concrete workability. The resulting concrete has improved thermal resistance while maintaining construction quality and economic performance.

15. Concrete Composition with Portland Cement, Magnesium Fluoride, Slag, Ceramic Powder, and Carbon Fiber Reinforcement

GUANGDONG RONGQUANHUI CONCRETE CO LTD, 2020

Fire-resistant and heat-insulating concrete composition that addresses the long-term strength degradation and poor fire resistance of traditional refractory concretes. The composition incorporates Portland cement as the binder, supplemented by a combination of magnesium fluoride, slag powder, and ceramic powder, along with carbon fiber reinforcement. The addition of these components enables the concrete to maintain its mechanical properties over extended periods while exhibiting enhanced fire resistance and corrosion protection compared to conventional refractory concretes.

16. Multi-Component Fire-Resistant Coating for Concrete with Enhanced Adhesion and Degradation Resistance

SICHUAN FIRE RESEARCH INSTITUTE OF MEM, 2020

Fire-resistant coating for concrete structures that enhances adhesion and prevents degradation through a multi-component formulation. The coating comprises a base of adhesive, thermal insulation filler, water-reducing agent, air-entraining agent, polyvinyl alcohol, ammonia, sodium borate, zinc borate, polyvinyl alcohol fiber, hydrogenated castor oil, and solvent. The formulation combines these components to provide a durable, fire-resistant barrier while maintaining the structural integrity of the reinforced concrete.

17. Concrete Composition with Integrated Flame Retardants and Corrosion Inhibitors via Unique Dispersion Process

CHINA RAILWAY 12 BUREAU GROUP CO LTD, China Railway 12th Bureau Group Second Engineering Co., Ltd., 中铁十二局集团有限公司, 2019

Flame-retardant and corrosion-resistant building construction concrete that enhances the performance of existing concrete. The concrete combines improved flame retardancy and corrosion resistance with enhanced durability, deformation performance, fire and explosion resistance, health and environmental protection, and cost reduction. The product achieves these benefits through a unique dispersion process that incorporates flame retardants and corrosion inhibitors into the concrete mixture, resulting in a superior performance profile compared to conventional concrete.

CN107032702B-patent-drawing

18. Concrete Composite with Nanoporous Material and Polymer Emulsion for Enhanced Thermal Stability and Mechanical Strength

Guangdong Xinqiang Concrete Co., Ltd., GUANGDONG XINQIANG CONCRETE CO LTD, 2019

High-temperature resistant concrete that combines enhanced thermal stability with improved mechanical properties. The concrete contains a nanoporous material with controlled pore structure, which is combined with polymer emulsion. The nanoporous material enhances thermal resistance by creating a barrier against heat transfer, while the polymer emulsion provides additional mechanical durability. The resulting composite exhibits superior thermal resistance compared to conventional high-temperature concrete while maintaining adequate mechanical performance.

CN107151118B-patent-drawing

19. Fiber Composite Concrete with Citric Acid-Chitosan and Methacrylic Acid Matrix and Fiber Reinforcement System

NORTH CHINA UNIVERSITY OF WATER RESOURCES AND ELECTRIC POWER, 2019

Fiber composite concrete with enhanced fire resistance, developed through a novel fiber reinforcement strategy. The innovative approach involves combining a specific fiber reinforcement system with a proprietary matrix formulation, which enables improved fire resistance while maintaining superior workability. The matrix formulation incorporates citric acid-chitosan and methacrylic acid, which exhibit enhanced thermal stability and chemical resistance, while the fiber reinforcement system comprises a specific blend of fibers with optimized mechanical properties. The combination of these components results in a fiber composite concrete with enhanced fire resistance and improved performance characteristics compared to conventional fiber-reinforced concrete.

CN109665782A-patent-drawing

20. Concrete Composition with Expanded Perlite and Refractory Fiber

JIANGSU ZHAOJIA BUILDING MATERIAL TECH CO LTD, 2019

High-fire-resistant concrete comprising cement, natural stones, sand, expanded perlite, sodium lauryl sulfate, fly ash, sodium lignosulfonate, refractory fiber, water-reducing agent, and water balance. The composition includes 30-40 parts of cement, 10-20 parts of natural stones, 2-5 parts of natural sand, 2.5-5 parts of expanded perlite, 5-10 parts of sodium lauryl sulfate, 10-20 parts of fly ash, 1-3 parts of sodium lignosulfonate, 5-10 parts of refractory fiber, and 1-3 parts of water-reducing agent, with the water balance maintained.

CN109111160A-patent-drawing

21. Concrete Composition with Reinforcement Fibers and Controlled Fineness Modulus for Enhanced Thermal Shock Resistance

22. Concrete Composition with Brominated Epoxy Resin, Magnesium Aluminum Hydrotalcite, and Decabromodiphenylethane

23. Refractory Concrete Incorporating Controlled Atmosphere Calcined Industrial Waste-Derived Metakaolin

24. Fire-Resistant Material with Controlled Thermal Expansion for Fly Ash Foamed Concrete

25. Building Material Composition with Cement, Synthetic Resin, Metal Components, Rubber Particles, and Polyacrylonitrile Fiber Dispersant

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