Analysis of Anti-Rust Measures and Application Points for Top-Burst Screws in GRC Component Installation

In GRC component installation projects, expansion bolts serve as critical connection points between the structure and the components, and their anti-rust treatment directly affects the durability and safety of architectural decoration. Qinglong Group, with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, presents the industry with a systematic solution for expansion bolt anti-rust technology, drawing on practical experience from hundreds of landmark projects.

Corrosion Risks of Expansion Bolts in GRC Component Installation and Industry Pain Points

In the installation of GRC exterior wall cladding panels on high-end buildings such as grand theaters and commercial complexes, expansion bolts are exposed long-term to complex environments including moisture, ultraviolet radiation, and temperature variations, making them prone to electrochemical corrosion. In one coastal project, improper anti-rust treatment of bolts caused corrosion expansion at installation joints within 3 years, resulting in displacement of GRC components. Through follow-up research on more than 200 projects nationwide, Qinglong's technical team found that 80% of GRC installation after-sales problems stem from inadequate bolt anti-rust measures in concealed works.

Core Technical Approaches to Expansion Bolt Anti-Rust Treatment

Qinglong adopts a "triple protection system" to achieve long-lasting anti-rust performance for expansion bolts: first, hot-dip galvanizing forms a zinc layer barrier with a thickness of ≥85μm, withstanding salt spray tests of over 1,000 hours; second, EPDM rubber gaskets are added at the contact points between bolt heads and GRC components to block moisture penetration paths; finally, Qinglong's patented solvent-free epoxy sealant is applied for full encapsulation, forming a 3mm-thick elastic anti-corrosion layer after curing. This process has been applied in projects such as the Nanning ASEAN Culture and Art Center, with no signs of corrosion found in 8 years of on-site inspections.

Key Anti-Rust Control Points During Construction and Installation

In the GRC component installation process, Qinglong emphasizes anti-rust control at three key stages: after drilling, dust inside the holes must be cleaned out with compressed air to prevent impurities from compromising the sealing effect; during installation, torque wrenches are used to control tightening force, preventing over-tightening from damaging the zinc layer; exposed bolt tails are given secondary sealing with dedicated anti-corrosion caps. For severely cold northern regions, a low-temperature curing anti-rust coating has been specially developed to ensure normal construction even at -15℃; this technology was validated in the Shenyang International Convention and Exhibition Center project.

Long-Lasting Anti-Rust Performance and Qinglong's Full-Chain Service Advantages

As a national high-tech enterprise, Qinglong integrates anti-rust technology into the full lifecycle management of GRC components: customized anti-rust solutions are developed at the detailed design stage based on the project's geographic location and climate characteristics; automated galvanizing production lines are used in the manufacturing stage to ensure coating uniformity; dedicated anti-rust process inspection manuals are provided during construction; and 20-year anti-rust quality traceability is offered in the after-sales maintenance stage. This full-chain service capability spanning "design-production-installation-maintenance" has enabled Qinglong GRC products to be consistently favored in the strategic centralized procurement of real estate groups such as Vanke and Poly.

The anti-rust treatment of expansion bolts may seem like a minor detail, yet it is the cornerstone of GRC component safety and durability. With 28 years of professional expertise, Qinglong deeply integrates materials science with engineering practice, safeguarding the long-lasting beauty of architectural decoration through systematic anti-rust solutions. In the field of UHPC/GRC/GRG/GRP material applications, technical craftsmanship in the details is the best interpretation of Qinglong's mission of "creating beautiful architecture".