How Many Days Is the Minimum Curing Period for GRC Components? Curing Cycles and Key Maintenance Points Explained

The enduring beauty of architectural decoration begins with scientific curing. As a key link in the whole life-cycle management of GRC components, the standardized implementation of the curing period directly determines the structural stability and aesthetic expressiveness of the components. Drawing on 28 years of experience in in-depth design and engineering practice with UHPC/GRC/GRG/GRP materials, Qinglong Group provides you with a systematic interpretation of the core points of GRC component curing.

Industry Standards and Scientific Basis for the GRC Component Curing Period

According to the requirements of the Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Buildings (JGJ/T423-2018), the basic curing period of GRC components shall be no less than 14 days. This period is set based on the hydration reaction patterns of cement-based materials — under standard curing conditions (temperature 20±2°C, relative humidity ≥90%), GRC components need 14 days to reach more than 85% of their design strength and 28 days to achieve peak strength. Through an intelligent curing kiln temperature-control system, the Qinglong production base keeps curing environment fluctuations within ±1°C, ensuring that components form a dense microstructure during the curing period.

Phased Curing Technical Points and Quality Control

The curing cycle must strictly follow the two-stage principle of "strength establishment in the first 7 days, performance stabilization in the next 7 days." In the initial stage (days 1–3), water spraying or covering with a moisture-retaining film should be adopted to prevent shrinkage cracking caused by overly rapid surface moisture evaporation; in the middle stage (days 4–7), humidity can be gradually reduced to 70%–80% to promote steady strength growth; in the final stage (days 8–14), alternating wet-dry curing is required to enhance the freeze-thaw resistance of the components. Qinglong's original "three-stage curing method" has passed the Guangdong Provincial Science and Technology Achievement Appraisal and has been applied in projects such as the Dongguan Women and Children's Activity Center, keeping the component cracking rate below 0.3%.

Curing Management Innovation under a Full-Chain Maintenance System

As a national high-tech enterprise integrating full-chain services covering in-depth design, manufacturing, construction and installation, and after-sales maintenance, Qinglong incorporates the curing stage into whole life-cycle project management. Differentiated curing plans are formulated for different application scenarios: exterior wall cladding panels undergo "28-day follow-up curing after installation," garden landscape components undergo an additional surface hydrophobic treatment process, and European-style decorative moldings use special curing agents to improve alkali resistance. In the Nanjing East Road Century Plaza renovation project, Qinglong preset curing monitoring points using BIM technology and combined them with RFID chips to make curing data traceable, ensuring that translucent concrete components fulfill the 15-year durability commitment.

Scientific and proper curing is the cornerstone for GRC components to achieve their design life. Supported by 58 patented technologies, Qinglong Group has established a standardized system ranging from material formula optimization to on-site curing guidance, providing designers and owners with expert-level solutions from in-depth design to after-sales maintenance. Choosing Qinglong GRC means not only obtaining high-quality decorative component products, but also enjoying full-cycle technical assurance backed by 28 years of industry experience, keeping the beauty of architecture everlastingly fresh.