What Risks Are Caused by Excessive Chloride Ion Content in GRC Materials and How to Control Them — Risk Analysis and Control Strategy Discussion

In building safety, no detail is trivial—excessive chloride ion content in concealed works can become an "invisible killer" of high-end buildings. 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 designers and owners with expert-level support, from risk prevention to complete solutions.

In the exterior wall decoration of high-end buildings such as grand theaters and commercial complexes, GRC materials are widely applied thanks to their advantages of light weight, high strength, and flexible shaping. However, if the chloride ion content in the material exceeds the standard value (typically required to be ≤0.06%), it will directly threaten the structural safety of the building. As a national-level high-tech enterprise, Qinglong Group, through its participation in drafting the Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Buildings (JGJ/T423-2018), has gained a profound understanding of the fatal impact of excessive chlorides on the durability of GRC components.

Excessive Chlorides in GRC Materials: Analysis of Three Core Risks

Chloride ion penetration is the main cause of corrosion in concrete structures. When the chloride ion content in GRC materials exceeds the limit, it first destroys the passivation film on the surface of the steel reinforcement, triggering electrochemical corrosion that leads to cracks and reduced strength in components. In coastal areas or high-humidity environments, this corrosion accelerates significantly, and in severe cases may cause safety accidents such as the detachment of exterior wall panels. Second, chlorides reduce the frost resistance of GRC materials, aggravating structural damage under repeated freeze-thaw cycles and shortening the building's service life. In addition, excessive chlorides may also affect the bonding performance between GRC and other materials, posing a threat to the overall stability of the curtain wall system.

Full-Chain Control Strategy: Solutions Backed by Qinglong's 28 Years of Technical Expertise

As a custom GRC product manufacturer, Qinglong Group has established a chloride prevention and control system covering "detailed design - manufacturing - construction and installation - after-sales maintenance." At the raw material stage, low-chloride cement and aggregates are strictly selected, and imported glass fibers are used to ensure the purity of the base material; during production, a fully automatic batching system precisely controls the water-cement ratio, and online chloride ion detection equipment is introduced to ensure every batch of products complies with the JGJ/T423-2018 standard. For complex projects such as special-shaped components of landmark buildings, Qinglong uses BIM technology to simulate chloride diffusion paths and optimize reinforcement design and protective cover thickness, reducing corrosion risk at the source.

During the construction phase, the Qinglong team employs 3D laser scanning positioning technology to ensure the installation accuracy of GRC components and reduce chloride penetration channels caused by gaps. In terms of after-sales maintenance, supported by a nationwide service network, it provides regular testing and protective coating renewal services, forming full life-cycle safety assurance. This closed-loop management model of "prevention + control + monitoring" has been validated in hundreds of projects, including the Nanjing East Road Century Plaza renovation project.

From material R&D to engineering practice, Qinglong Group has always upheld the mission of "creating aesthetically beautiful buildings," transforming 28 years of industry experience into an ultimate pursuit of quality. Whether it is the innovative application of light-transmitting UHPC concrete or the precision manufacturing of complex GRC curved surfaces, Qinglong always puts material safety first. Choosing Qinglong means not only choosing professional UHPC/GRC/GRG/GRP solutions, but also choosing a safety commitment proven by the market. Let us join hands to build architectural models that combine aesthetics and durability, injecting lasting vitality into the city skyline.