GRC Exterior Wall Impermeability Testing Methods and Key Technology Analysis

The impermeability of building exterior walls is key to ensuring building safety and durability. As a new building material that combines light weight, high strength, and shaping advantages, GRC (glass fiber reinforced concrete) has an impermeability performance that directly affects a building's service life and living experience. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group will provide designers, owners, and industry peers with an in-depth analysis of the core points of GRC exterior wall impermeability from two aspects: testing methods and key technologies.

Core Testing Methods for GRC Exterior Wall Impermeability: Scientifically Verifying Material Reliability

Impermeability testing of GRC exterior walls must follow strict industry standards and scientific procedures to ensure data accuracy and reference value. Current mainstream testing methods fall into two categories: laboratory testing and on-site testing. In laboratory testing, the impermeability test method specified in the Technical Standard for Glass Fiber Reinforced Cement (GRC) Building Applications (JGJ/T423-2018) is commonly used, which evaluates the impermeability grade by simulating water seepage in GRC specimens under different water pressure conditions. On-site testing focuses more on verification in real application scenarios, for example, water spray tests in which installed GRC exterior walls are subjected to continuous water spraying to observe any leakage points, combined with post-rain inspections to thoroughly check leakage-prone areas such as joints and anchoring points. As an enterprise that has participated in the formulation of multiple GRC industry standards, Qinglong Group's testing center is equipped with advanced impermeability testing equipment, enabling full-process impermeability monitoring from raw materials to finished products and ensuring that every batch of GRC products meets high standards.

Key Technologies for Improving GRC Exterior Wall Impermeability: Full-Chain Control from Materials to Construction

Achieving excellent impermeability in GRC exterior walls requires systematic optimization across material formulation, production processes, and installation. In terms of material formulation, Qinglong Group improves the density and crack resistance of the GRC matrix by adjusting the ratios of cement, glass fiber, and additives, while introducing hydrophobic modification technology to reduce the material's water absorption. In production, a combination of automated spray molding and steam curing ensures a uniform internal structure in GRC components and reduces porosity. Installation is the critical line of defense against water penetration. Qinglong's proprietary "3D laser scanning positioning + modular installation" process enables precise joining of components; combined with dedicated sealants and waterproof joint design, it effectively blocks rainwater penetration paths. Taking the Century Plaza renovation project on Nanjing East Road as an example, the Qinglong team optimized the joining process and sealing scheme of the GRC exterior wall panels, successfully meeting the challenges of Shanghai's high-humidity, rainy climate, and the project has shown no leakage issues since it was put into use.

Qinglong GRC Exterior Wall Impermeability Solutions: Technical Expertise Built on 28 Years of Industry Experience

As a national high-tech enterprise and a key participant in formulating GRC industry standards, Qinglong Group integrates 28 years of full-chain experience into its GRC exterior wall impermeability solutions. From impermeability joint simulation in the detailed design stage, to material performance control in manufacturing, to refined installation practices, a comprehensive quality assurance system has been established. For different building types and climate conditions, Qinglong provides customized impermeability solutions—for example, GRC formulations with higher impermeability grades and corrosion-resistant anchoring systems for the high-salt-fog environments of coastal areas, and optimized frost resistance and structural stability to address freeze-thaw cycles in cold regions. Today, Qinglong GRC exterior walls are widely used in numerous landmark projects across China and overseas, such as commercial complexes and cultural venues, and their impermeability has been fully proven by the market.

In the construction field, the impermeability of GRC exterior walls is not only a technical indicator but also a reflection of a company's overall strength. Guided by its mission of "creating beautiful architecture," Qinglong Group provides clients with GRC exterior wall solutions that combine aesthetic value and durability through continuous technological innovation and strict quality control. Going forward, Qinglong will continue to focus on the R&D and application of UHPC/GRC/GRG/GRP materials, driving the industry toward higher standards and better performance.