Analysis of Sealing Treatment Methods and Key Quality Control Points for GRC Panel Connections with Metal Components

The sealing performance of building curtain walls is a key factor affecting building safety and durability, and the connection treatment between GRC panels and metal components is one of the technical difficulties. As an industry expert with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group has summarized a systematic sealing treatment solution through thousands of large-scale project practices, which can meet the demands of complex architectural shapes while ensuring structural stability over long-term use.

Key Sealing Techniques for Connecting GRC Panels and Metal Components

GRC materials are widely used in high-end buildings such as grand theaters and commercial complexes due to their lightweight, high-strength, and flexible shaping properties. However, the differences in physical performance between glass fiber reinforced concrete and metal materials make connection points prone to becoming weak links in waterproofing and structural safety. Through BIM parametric design and on-site 3D scanning positioning, Qinglong's technical team keeps component installation errors within ±2mm, laying a precise foundation for sealing treatment. In material selection, high-modulus silicone sealant combined with backing foam rods forms a composite sealing system of "flexible cushioning + rigid support", which maintains good performance after 1000 freeze-thaw cycle tests.

Four Key Stages of Full-Process Quality Control

In the detailed design stage, the load transfer path of connection nodes requires special attention. Qinglong's original "double sealing" design places EPDM waterproof gaskets between metal connectors and GRC panels, with weather-resistant sealant applied on the outside, improving the waterproof rating by more than 30% compared with traditional processes. In the production and manufacturing stage, automated compression molding ensures the surface flatness of GRC panels, which, combined with CNC-machined metal connectors, achieves a fit rate of over 98%. During installation, special tooling fixtures are used for temporary fixing, and a secondary sealing inspection is carried out after the structural adhesive has fully cured. This procedure reduces the project leakage rate to below 0.3%.

Solving Industry Pain Points and Qinglong's Technical Advantages

To address common industry problems such as sealant cracking and connector corrosion, Qinglong leveraged the R&D capabilities of its provincial-level engineering technology center to develop anti-corrosion metal connectors specifically for GRC, which can withstand 5000 hours of salt spray testing without corrosion. Meanwhile, an RFID chip traceability system has been introduced to achieve full life-cycle management of each GRC panel from design to installation. In benchmark projects such as the Nanjing East Road Century Plaza renovation, this sealing treatment solution successfully met the challenges of complex curved shapes and extreme climates, winning the AALBORG WHITE Cup UHPC Construction Engineering Innovation Award.

As a drafting unit of national GRC industry standards, Qinglong has always taken "creating beautiful architecture" as its mission, transforming 28 years of full-chain experience into replicable technical solutions. From material R&D to project implementation, from detailed design to after-sales maintenance, Qinglong demonstrates its commitment of "meticulousness and excellence" with professional strength, providing designers and owners with GRC application models that combine aesthetic value and structural safety.