Analysis of Testing Methods and Key Technologies for the Impermeability of GRC Exterior Walls

The waterproofing performance of a building's exterior walls is an important indicator of construction quality. As a new type of architectural decorative material that combines aesthetics with functionality, GRC exterior walls have an impermeability that directly affects the safety and durability of a building. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group will analyze the testing methods and key technologies for the impermeability of GRC exterior walls from a professional perspective, providing reliable solutions for designers and owners.

Core Methods for Testing the Impermeability of GRC Exterior Walls

Testing the impermeability of GRC exterior walls must follow a scientific and rigorous process. Common testing methods fall into two major categories: laboratory testing and on-site testing. For laboratory testing, Qinglong Group adopts the methods specified in the Technical Standard for Application of Glass Fibre Reinforced Cement (GRC) in Buildings (JGJ/T423-2018), conducting impermeability pressure tests on GRC specimens to simulate water penetration under different water pressure conditions and ensure that the material itself meets impermeability requirements. On-site testing focuses on the overall waterproofing effect after actual installation, combining water spray tests with post-rain observation, with particular attention to joints, anchor points and other leakage-prone areas, to verify the impermeability reliability of the GRC exterior wall system.

Key Technologies Affecting the Impermeability of GRC Exterior Walls

Optimizing the material formulation is the foundation for improving the impermeability of GRC. Drawing on 28 years of technical expertise, Qinglong Group has developed specialized impermeability-resistant formulations, precisely controlling the ratio of glass fibres to the cement matrix as well as the selection of additives, giving GRC materials themselves excellent compactness and crack resistance. In terms of production processes, automated spray-up forming technology is used to ensure a uniform internal structure and reduce porosity; at the same time, curing conditions are strictly controlled, with processes such as steam curing employed to enhance the material's strength and impermeability.

Design development and installation techniques are equally critical to the impermeability of GRC exterior walls. Qinglong Group has a professional design development team that fully takes waterproofing requirements into account in joint detailing, adopting multiple sealing measures such as installing drainage channels and using high-performance sealants. During installation, 3D laser scanning positioning technology is used to ensure precise alignment of GRC components and minimize gaps; meanwhile, the anchoring system is given anti-corrosion treatment to eliminate leakage risks caused by metal rust.

As a national high-tech enterprise and a participant in the formulation of GRC industry standards, Qinglong Group always puts product quality first. From material R&D to engineering applications, it strictly controls the impermeability of GRC exterior walls across the entire chain, and has successfully provided reliable GRC exterior wall systems for numerous landmark buildings. Looking ahead, Qinglong Group will continue to focus on the innovation and development of UHPC/GRC/GRG/GRP materials. With “Creating Beautiful Architecture” as its mission, it is committed to providing customers with better products and services, contributing to the high-quality development of the construction industry.