Innovative Research on Basalt Fiber Fireproof Insulation Board Exterior Wall External Insulation System

• Material Innovation: GBF Basalt Fiber Fireproof Insulation Board

1.Material Structure and Classification

   Solid Board: Composed of chopped continuous basalt fibers arranged in a three-dimensional interlocking structure through carding and needle-punching, followed by high-temperature and high-pressure forming (thickness: 3–30 mm). Its acidity coefficient** (SiO₂ + Al₂O₃)/(CaO + MgO) reaches 6.5, far exceeding that of rock wool (1.6–1.8), with mechanical properties improved by over 10 times.  

   Sandwich Board: A "three-layer" structure with 3–6 mm basalt fiber surface layers and vertical rock wool strips as the core, bonded by phenolic resin. This design overcomes traditional rock wool’s drawbacks (water absorption, delamination, and skin irritation), achieving a tensile strength of  135 kPa—10 times higher than conventional rock wool boards.  

2.Performance Breakthroughs  

   Fire Resistance: Achieves A1-grade fire rating (non-combustible) with a limiting oxygen index ≥68, furnace temperature rise of only 13°C, and mass loss rate of 5.3%, surpassing national standards.  

   Durability: In the Hengdian Wenrong Hospital project (30,000 m² GBF sandwich boards exposed for 10 months), the system endured extreme conditions (scorching sun, typhoons, freezing temperatures) without delamination or damage.  

   Energy Efficiency & Sustainability: Thermal conductivity coefficient of 0.036–0.040 W/(m·K). Production adopts all-electric melting technology, consuming only 3.5 kWh per kilogram of fiber with zero carbon emissions.  

• System Innovation: Thin Plaster and Integrated Insulation-Decoration Systems

1.Thin Plaster Mortar System 

   Uses GBF boards as the insulation layer, covered with crack-resistant mortar and fiberglass mesh (total thickness ≤20 mm). Applied at the Shenyang International Building Materials Exhibition Hall, the system achieved **65% energy savings** and passed 2 years of extreme climate testing.  

   Innovation: Enhanced interfacial bonding strength via fiber-reinforced mesh, eliminating cracking and hollowing issues in traditional systems.  

2.Integrated Insulation-Decoration System  

   Combines decorative layers (aluminum panels, stone), fireproofing, and insulation into a multifunctional solution. For example, the Wenrong Hospital project used 48 mm thick GBF sandwich boards to replace rock wool, withstanding prolonged exposure without damage before decorative stone installation.  

   Advantages: 50% faster installation, 30% lower overall costs, ideal for passive houses and ultra-low-energy buildings.  

• Application Cases and Market Validation

1.Domestic Benchmark Projects

   Hengdian Wenrong Hospital: 30,000 m² exterior walls with GBF sandwich boards, endorsed by German architects and recommended to the International Green Design Organization.  

   Shanghai Standardization: Recognized as "domestically pioneering and internationally leading" after rigorous evaluations, incorporated into Shanghai’s recommended construction standards.  

2.Global Recognition

   Italy’s ENEA agency stated that "no comparable products exist in Europe." Bulk orders from South Korea, the U.S., and Italy, with the 2014 **National Green Design Award** highlighting its innovation.  

• Technical Challenges and Solutions

1.Production Bottlenecks  

   Difficulty in melt homogeneity control and fiber diameter consistency.  

   Solutions: Shifted from crucible to tank furnace technology, reducing energy consumption by 30% and increasing daily output to 10,000 m². Developed 5-micron ultrafine fiber technology for superior performance.  

2.Cost and Market Penetration

   Initial production costs remained high . However, economies of scale and policy subsidies (e.g., China’s "14th Five-Year Plan" for new materials) are driving cost reductions.  

• Conclusion

The GBF Basalt Fiber Fireproof Insulation Board achieves a revolutionary balance between building energy efficiency and safety through material and systemic innovations. Its technical maturity and market validation provide a "Chinese Solution" for global green construction. With ongoing technological advancements and policy support, GBF boards are poised to become a cornerstone of the trillion-dollar advanced materials market.