What Protective Measures Should Be Strengthened for GRC Curtain Walls in Coastal Areas? Qinglong GRC Specialized Protection Technology System for Coastal Regions

GRC curtain wall protection in coastal areas requires building a triple protection system of "material modification, structural reinforcement, and surface protection." Addressing high salt fog, high humidity, and strong UV environments, Qinglong GRC has developed specialized protective technology: using low-alkali sulphoaluminate cement (alkali content ≤0.6%), adding silica fume (8%-10%) to fill capillary pores, and using zirconia-type alkali-resistant glass fiber (ZrO₂≥16.5%). Surfaces are coated with a fluorocarbon protective coating (thickness ≥35μm), and joints use silicone structural sealant (movement capability ≥25%). Verified by real-sea exposure coupon tests, this protection system extends the service life of GRC curtain walls in coastal environments from 30 years in ordinary areas to 50 years.

In a coastal hotel project in Zhoushan, Qinglong GRC adopted the triple protection: the substrate chloride ion diffusion coefficient was reduced to 1.5×10⁻¹²m²/s; joints were equipped with a pressure balancing system; stainless steel connectors use 316L material with added insulating gaskets. Inspection after 5 years of use showed a carbonation depth of only 0.8mm, rebar potential of -120mV, and no corrosion activity—demonstrating significant protective effectiveness.

Material System Enhancement Measures

Cement uses low-alkali sulphoaluminate cement (alkali content ≤0.6%); admixtures include silica fume (8%-10%) and mineral powder (5-8%); fibers are zirconia-type alkali-resistant glass fiber (ZrO₂≥16.5%). Durability is enhanced at the material source.

Structural Design Reinforcement Scheme

Protective cover thickness increased to 25mm; drainage cavities provided (height ≥20mm); joints designed on the rainscreen principle. Moisture penetration paths are blocked through structural design.

Surface Protection System Configuration

Penetrating protective agent on the base surface (penetration depth ≥3mm); intermediate fluorocarbon coating (thickness ≥35μm); top self-cleaning coating (contact angle ≥110°). The triple-layer protection effectively resists environmental erosion.

Anti-Corrosion Treatment of Metal Components

Connectors use 316L stainless steel (Mo content ≥2.5%); insulating gaskets installed at contact points; welded parts hot-dip galvanized (zinc layer thickness ≥85μm). Electrochemical corrosion is eliminated.

Coastal protection requires a systematic solution. Qinglong GRC specialized technology ensures long-lasting curtain wall durability.