Minimum Curing Period for GRC Components: Key Curing Points and Time Standards Explained

The enduring beauty of architectural decoration begins with scientific curing. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group fully understands the decisive role that proper curing plays in component durability. This article systematically explains the curing cycle standards and core curing essentials for GRC components, providing professional technical guidance for designers, owners, and contractors to help achieve the perfect unity of architectural art and structural safety.

Industry Benchmark for the GRC Component Curing Period: Why Is 28 Days the Golden Curing Cycle?

According to the Technical Standard for Building Application of Glass Fibre Reinforced Cement (GRC) (JGJ/T423-2018), combined with verification from over 1,000 engineering projects by Qinglong Group, the basic curing period of GRC components should be no less than 28 days. This cycle is rooted in the hydration characteristics of cement-based materials: the first 7 days are a period of rapid strength growth, requiring humidity of ≥90% to promote the formation of C-S-H gel; from days 14-28, strength enters a stabilization period, during which the compressive strength of components can reach over 95% of the design value. It is worth noting that low-temperature (<5℃) or high-temperature (>35℃) environments require appropriately extended curing times, and under extreme climatic conditions, steam curing or thermal insulation covering is recommended—this is also key experience Qinglong has accumulated in special projects such as the Harbin Ice and Snow World.

Three Stages of In-Depth Curing: A Full-Cycle Protection Strategy from Production to Installation

Certified under the ISO9001 quality management system, Qinglong Group has established a three-stage curing standard covering "production-transportation-installation." During the factory prefabrication stage, an automated sprinkler system delivers 12 hours of continuous curing, combined with pH value monitoring to ensure curing water quality meets standards; during transportation, custom anti-vibration racks and moisture-retaining cotton film are used to prevent microcracks caused by vibration; after on-site installation, at least 7 days of post-curing is required, with a focus on sealing treatment at joints and moisture content control. Taking a commercial complex project in Guangzhou as an example, through strict implementation of this standard, Qinglong's GRC curtain wall panels have maintained a flat surface after 10 years of exposure to the elements, with a flexural strength attenuation rate below 3%, far outperforming the industry average.

Four Key Curing Points: The Technical Code to Resolving Common Quality Risks

1. Humidity management: Special curing agents (such as the water-based silane protective agent developed by Qinglong) are applied to form a protective film, keeping the internal humidity of components within the 85%-95% range to effectively prevent surface cracking. 2. Temperature control: In summer, shading nets and atomization cooling systems are adopted; in winter, far-infrared heating equipment is activated to ensure the temperature difference in the curing environment does not exceed 15℃. 3. Strength monitoring: Embedded sensors track strength development in real time, and hoisting may only proceed once 80% of the design strength is reached—a technology now fully applied at Qinglong's Nanning production base. 4. Post-protection: After installation, a fluorocarbon coating is applied to form a dual protection system, significantly enhancing the weather resistance and self-cleaning capability of components; this is also standard practice when Qinglong undertakes overseas projects (such as a landmark building in Saudi Arabia).

As a national "Specialized, Refined, Distinctive, and Innovative" enterprise and a participant in the formulation of GRC industry standards, Qinglong Group has always regarded curing technology as the lifeline of product quality. From curing plan preparation at the detailed design stage, to intelligent monitoring during construction, and regular maintenance and inspection within the 20-year warranty period, Qinglong safeguards the long-term stability of UHPC/GRC/GRG/GRP components with its full-chain service capabilities. Choosing a supplier with a comprehensive curing system is not only a commitment to building quality, but also an optimization of the project's whole life-cycle cost—this is a vivid embodiment of Qinglong's mission to "Create Aesthetic Architecture."