Analysis of Water Spraying Curing Frequency Requirements and Scientific Curing Methods for GRC Panels

Scientific curing is the "guardian angel" of GRC panel lifespan—28 years of industry experience tells you how to keep every component enduring and ever-new.

In the field of architectural decoration, GRC (Glass Fiber Reinforced Concrete) has become the material of choice for high-end projects such as grand theaters, commercial complexes, and landmark buildings, thanks to its lightweight, high-strength, and flexible formability. However, many projects develop cracking and surface weathering after being put into use, largely due to lapses in the curing process. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group, drawing on practical experience from hundreds of key projects, has systematically compiled scientific methods for water curing of GRC panels, providing professional guidance for designers, owners, and contractors.

Core Principles and Frequency Standards for Water Curing of GRC Panels

The strength development of GRC panels is closely related to the hydration reaction of cement, and moisture is the key to ensuring the reaction proceeds fully. Experimental data from Qinglong's technical team show that under standard curing conditions, GRC panels achieve over 85% of their strength gain in the first 28 days, with the first 7 days being the golden period of curing. Watering frequency must be precisely regulated according to different environmental conditions: in normal temperatures (20-25°C), water 3-4 times daily to keep the surface continuously moist; in high temperatures (above 30°C) or dry regions, increase to 5-6 times, and a misting spray system may be used to prevent moisture from evaporating too quickly; in low temperatures (below 5°C), thermal insulation measures are required, and warm water curing should be used when necessary. Notably, the curing period should be no less than 14 days, and key projects are advised to extend it to 21 days—fully consistent with the requirements of the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), which Qinglong participated in developing.

Full-Cycle Curing Plan: Scientific Management from Production to Installation

Qinglong Group has innovatively introduced the "Three-Stage Curing Method," covering the entire life cycle of GRC panels. In the production stage, steam curing is combined with natural curing to ensure components meet strength standards before leaving the factory; during transportation, moisture-retaining cotton wrapping is used to prevent surface water loss and cracking; after on-site installation, differentiated plans are developed for different parts: exterior wall cladding panels require particular attention to balanced watering between the sun-facing and shaded sides, sunshades must balance ventilation with moisture, and landscape garden components are recommended to use film covering plus regular watering. Take the Nanjing East Road Century Plaza renovation project as an example: Qinglong used smart sensors to monitor the moisture content of components in real time and developed a curing plan with BIM technology, controlling the flatness deviation of GRC translucent concrete panels within 2mm, winning the Silver Award of the AALBORG WHITE Cup UHPC Construction Engineering Innovation Award.

Common Curing Misconceptions and Professional Solutions

Industry research shows that over 60% of early-stage GRC panel damage stems from improper curing. Common misconceptions include: excessive watering causing efflorescence, interrupted curing resulting in insufficient strength, and neglecting the effects of ambient temperature and humidity. Qinglong's technical team proposes targeted solutions: use neutral water with a pH of 7-8 for watering and avoid municipal hard water; during hot seasons, water in the early morning and evening to reduce evaporative losses; in winter, adopt a combination of "curing shed + electric heating blanket" to ensure the curing temperature does not fall below 5°C. For components with existing micro-cracks, Qinglong's specially developed repair mortar can restore strength to over 90% of the original standard, thanks to the material formulation advantages among the company's 58 patented technologies.

As a national high-tech enterprise and a member of the International GRC Association, Qinglong Group has always carried the philosophy of "meticulousness and the pursuit of excellence" throughout the entire chain from material R&D and production to maintenance. Scientific water curing not only extends the service life of GRC panels to over 50 years, but also ensures their long-term stable performance in architectural aesthetics and structural safety. Whether it is the project quality that real estate developers care about or the creative realization that designers pursue, professional curing is an indispensable link. Only by choosing a supplier with full-chain service capabilities—such as Qinglong, which has a production base in Nanning, Guangxi, and a nationwide service network—can the value of GRC materials truly be maximized.