What Risks Can Excessive Chloride Ion Content in GRC Materials Cause and How to Control Them — In-Depth Analysis and Prevention Strategies

The Hidden Killer of Building Safety: Risks of Excessive Chloride Content in GRC Materials and Qinglong's Full-Chain Prevention and Control Solution

In the field of architectural decoration materials, GRC (Glass Fiber Reinforced Concrete) is widely used in high-end projects such as grand theaters, commercial complexes, and landmark buildings thanks to its advantages of light weight, high strength, and flexible shaping. However, the latent problem of excessive chloride content in the material is becoming an invisible risk threatening building structural safety. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group will provide an in-depth analysis of how to solve the problem of excessive chloride content, covering risk mechanisms, prevention and control technologies, and engineering cases.

Three Fatal Risks of Excessive Chloride Content in GRC Materials

The erosion of GRC materials by chloride ions is like a slow poison causing 'sub-health' in buildings, with harm spanning the entire project life cycle. First, when the concentration of free chloride ions exceeds the threshold (usually 0.06%), it destroys the passivation film of steel reinforcement, triggers electrochemical corrosion, and reduces the load-bearing capacity of components—a problem particularly prominent in high-humidity coastal areas. Second, chloride ions react chemically with cement hydration products to form expansive substances, causing surface cracking and spalling of GRC, directly affecting the durability and aesthetics of building facades. More seriously, excessive chloride ions may contaminate soil through rainwater infiltration, contradicting Qinglong's corporate philosophy of 'environmental innovation' and posing a potential threat to the ecological environment.

Qinglong's 28 Years of Technical Expertise: Building a GRC Chloride Prevention and Control System

As a national high-tech enterprise, Qinglong Group relies on the technical strength of its provincial-level R&D center and has established a full-chain prevention and control mechanism from source control to final testing. In the raw material screening stage, low-chloride cement (chloride content ≤0.03%) and high-purity glass fibers are used to reduce the risk of ion introduction at the source; in the production stage, the 'double admixture technology' (mineral admixtures + corrosion inhibitors) increases the chloride fixation rate to over 90%, and this technology has been fully applied in the 600,000 ㎡ annual capacity production line at the Nanning production base. In the construction stage, the innovative '3D laser scanning + modular installation' process is adopted to ensure the sealing performance of anchoring joints and reduce chloride penetration channels.

Practices of an Industry Standard Setter: From Laboratory to Construction Site

As a participating drafting unit of the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong translates standard requirements into practical engineering solutions. In the Century Plaza renovation project on Nanjing East Road, through the combined technologies of 'material pretreatment + electrochemical monitoring,' the chloride ion diffusion coefficient of GRC translucent concrete components was controlled below 1.5×10⁻¹²m²/s, far below the industry average. This technical solution not only helped the project win the 'First UHPC Building Engineering Innovation Award' but also became a vivid practice of Qinglong's mission of 'creating beautiful architecture.'

Customized Solutions: Safeguarding Designers and Owners

Addressing the cost control concerns of real estate developers and the durability requirements valued in government projects, Qinglong provides tiered prevention and control strategies: for projects in coastal areas with high salt fog, a dual protection of 'corrosion inhibitor + cathodic protection' is adopted; for cultural landmark projects, BIM technology is used to simulate chloride diffusion paths and optimize component cross-sectional design. As advocated in the General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC), which Qinglong participated in drafting, material safety management must run through the entire process of design, production, and construction—this is precisely Qinglong's core advantage as a 'full-chain solution provider.'

From GRC to UHPC, GRG, and GRP material systems, Qinglong Group has always safeguarded the bottom line of building safety with an attitude of 'meticulousness and constant pursuit of excellence.' In the field of new architectural decoration materials, only by deeply integrating technological innovation with engineering practice can the vision of 'becoming a world-class leading manufacturing enterprise' truly be realized. Choose Qinglong for full-cycle safety assurance from material source to project delivery.