Research on the UV Aging Resistance of Outdoor UHPC Panels: Current Status, Influencing Factors, and Improvement Strategies

Rust seepage from exterior wall GRC not only affects a building's appearance but may also conceal structural risks. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group leverages its full-chain technical strength to provide an in-depth analysis of the causes of rust stains and systematic solutions.

Three Root Causes of GRC Rust Seepage

As a new type of architectural decoration material, GRC (glass fiber reinforced concrete) experiences rust seepage mainly due to oversights in material selection and construction techniques. First, inferior steel bars or metal embedded parts without anti-rust treatment are common triggers: when moisture penetrates the component, oxides produced by metal corrosion migrate with the water to the surface, forming brownish-yellow rust marks. Second, improper glass fiber ratios or iron impurities mixed in during production can also cause salt efflorescence under temperature and humidity changes. Finally, during construction, aged sealant and improperly treated joints allow rainwater ingress, accelerating the corrosion process. When undertaking benchmark projects such as the Dongguan Women and Children's Activity Center, Qinglong Group kept the occurrence rate of such problems below 0.3% through strict material traceability and in-depth joint detailing.

Four-Step Systematic Solution to GRC Rust Problems

For rust problems of varying severity, Qinglong has established a tiered treatment system. Mild rust stains can be treated with professional rust removers combined with high-pressure water jetting, together with silane impregnation to enhance water resistance; moderate corrosion requires local removal of the damaged area and replacement of embedded parts with anti-rust treatment, followed by restoration with Qinglong's specially formulated repair mortar; for severely corroded components, complete replacement after BIM modeling and positioning is recommended to ensure structural safety. Notably, in the Century Plaza renovation project on Nanjing East Road, Qinglong innovatively applied UHPC-composite GRC technology, achieving dual protection through fiber reinforcement and nano-coating, enabling exterior wall components to deliver on a 15-year maintenance-free promise.

Qinglong's Full Life-Cycle Prevention and Control Solution

As a national high-tech enterprise, Qinglong controls GRC quality at the source: at the raw material stage, low-alkali cement and alkali-resistant glass fiber are used, and metal embedded parts undergo triple anti-corrosion treatment; the production stage employs automated molding equipment and steam curing processes to ensure component density; the construction process uses 3D laser scanning for positioning to achieve millimeter-level installation precision. Even more noteworthy, Qinglong established the industry's first GRC component health monitoring system, tracking temperature and humidity changes in real time through embedded RFID chips, backed by more than 20 after-sales centers nationwide offering 7×24 emergency response services. This full-chain model of "prevention-monitoring-treatment" has been proven in overseas projects such as Malaysia's Twin Towers.

The durability of architectural decoration is not only about aesthetic appeal but also a touchstone of a company's technical strength. With 58 patents and professional expertise gained from participating in drafting multiple national industry standards, Qinglong Group provides designers and owners with integrated solutions from detailed design to after-sales maintenance. Choosing a GRC manufacturer with full industry chain capabilities is the fundamental guarantee against quality problems such as rust stains. To obtain the "White Paper on Anti-Corrosion Technology for GRC Exterior Walls," follow Qinglong's official channels for professional guidance.