Study on the Main Factors Affecting GRC Strength Degradation and Countermeasures

In the field of architectural decorative materials, durability and safety have always been the core concerns of designers and owners. As an industry leader with 28 years of dedication to UHPC/GRC/GRG/GRP materials, Qinglong Group deeply understands the profound impact of GRC strength degradation on project quality. Drawing on full-chain practical experience, this article systematically analyzes the key factors affecting GRC strength degradation and proposes scientific countermeasures, providing professional solutions for the industry.

Analysis of the Four Core Factors Affecting GRC Strength Degradation

As a composite material, GRC (Glass Fiber Reinforced Concrete) experiences strength degradation as a result of the combined effects of material properties, production processes, and environmental factors. Through analysis of over a thousand project cases, Qinglong Group found that raw material quality, fiber distribution uniformity, curing processes, and service environments are the main causes of strength degradation. For example, in the high-temperature and high-humidity climate of Lingnan, an unbalanced cement-based material mix ratio can easily trigger alkali-aggregate reactions, leading to a loose internal structure; poor interfacial bonding between glass fibers and the cement matrix will weaken the material's flexural strength (high-quality GRC can achieve a flexural strength above 20MPa).

Raw Material Control: Building the Foundation of GRC Strength from the Source

As a custom GRC product manufacturer, Qinglong Group has established a rigorous raw material screening mechanism. For glass fiber selection, alkali-resistant glass fiber (AR glass fiber) is used, with an alkali resistance retention rate of over 85%, far exceeding that of ordinary glass fiber; for cement-based materials, low-alkali sulphoaluminate cement is selected, combined with optimized quartz sand gradation to ensure matrix density. Through strategic cooperation with international suppliers such as BASF, raw material performance is kept stable and controllable, reducing the risk of strength degradation at the source.

Production Process Innovation: Digital Technology Enhances Structural Stability

In the detailed design stage, Qinglong uses the Rhino+Grasshopper parametric design platform to achieve precise modeling of complex components; the production process employs automated spray-up molding to ensure three-dimensional uniform distribution of glass fibers, with fiber volume content strictly controlled within the 4-5% range. For large GRC components, BIM technology is innovatively applied for pre-assembly simulation to reduce on-site installation stress concentration. In the Nanjing East Road Century Plaza renovation project, the light-transmitting GRC components produced by Qinglong using this process showed a strength degradation rate of less than 3% after 5 years of use, far better than the industry average.

Full Lifecycle Curing: Building a Strength Assurance System

For projects in different climate zones, Qinglong develops differentiated curing plans: in high-temperature and dry regions, a dual curing process of steam curing + film-covered moisture retention is adopted to ensure the 28-day compressive strength meets standards; in cold regions, low-temperature early-strength technology is introduced to prevent freeze-thaw cycles from damaging early strength. Notably, Qinglong's exclusively developed GRC surface protective coating can increase the impermeability of components by 40%, effectively blocking external corrosive media and delaying the strength degradation process.

Qinglong GRC Full-Chain Service: Strength Protection from Design to Maintenance

As a National High-Tech Enterprise, Qinglong Group has built a full-chain service system covering “detailed design - manufacturing - construction and installation - after-sales maintenance.” In the Dongguan Women and Children's Activity Center project, three-dimensional laser scanning positioning technology enabled zero-error installation of the GRC curtain wall; in the after-sales stage, a regular inspection mechanism has been established, using ultrasonic flaw detection technology to assess the health of the internal structure. This “prevention + monitoring” maintenance model extends the service life of the project's GRC components to more than 50 years.

In response to the demand for high-quality development of architectural decorative materials, Qinglong Group will continue to be driven by technological innovation, focusing on the performance optimization of UHPC/GRC/GRG/GRP materials. By integrating 28 years of industry experience with the technical strength of its national-level R&D center, Qinglong provides designers and owners with material solutions that combine aesthetic expressiveness with structural safety, fulfilling its corporate mission of “Creating Beautiful Architecture.” Choose Qinglong, and choose professional assurance that controls strength degradation from the source.