Production Process Differences Among GRC Manufacturers: Analysis and Comparison

In the field of architectural decoration materials, GRC (Glass Fiber Reinforced Concrete) has become the ideal choice for grand theaters, commercial complexes, landscape gardens, and other settings thanks to its advantages such as light weight, high strength, and flexible styling. However, differences in production processes among different GRC manufacturers directly affect product quality and project outcomes. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP, Qinglong Group will analyze the process characteristics of mainstream GRC manufacturers from three dimensions—material formulation, molding process, and quality control—providing professional reference for designers and owners.

**1. Material Formulation: The Technical Threshold from "Basic Ratio" to "Performance Optimization"** The core performance of GRC depends on the synergy between cement-based materials and glass fibers. Ordinary manufacturers mostly use general-purpose Portland cement and medium-alkali glass fibers, which, while meeting basic strength requirements, have limitations in weather resistance and crack resistance. Leading enterprises like Qinglong adopt a composite formulation of low-alkali sulphoaluminate cement and alkali-resistant glass fibers, with fiber content strictly controlled at 4-5% and flexural strength reaching over 20MPa—a 30% improvement over the industry average. In addition, Qinglong optimizes slurry fluidity and interfacial bond strength by incorporating active admixtures such as silica fume and ultra-fine mineral powder, enabling products to show no obvious damage after 500 freeze-thaw cycles at -40°C, an indicator that has passed the Guangdong Province Scientific and Technological Achievement Appraisal.

**2. Molding Process: The Balancing Art of Mechanization and Customization** GRC molding processes are mainly divided into the spraying method, the premix casting method, and the pressing method. Constrained by equipment investment, small and medium-sized manufacturers mostly use manual spraying or simple casting, resulting in problems such as uneven fiber distribution and poor surface flatness. Qinglong, however, relies on the intelligent production line at its Guangxi Nanning production base to achieve an integrated process of "mechanical spraying + vacuum degassing + steam curing": robotic arms precisely control the spraying angle and speed to ensure three-dimensional uniform fiber distribution; vacuum degassing technology reduces internal porosity to below 1%; and constant temperature and humidity curing kilns guarantee a 100% compliance rate for 28-day strength. For complex shapes such as double-curved surfaces and openwork reliefs, Qinglong has also introduced BIM parametric design and 3D-printed mold technology, with the minimum curvature radius controllable within 300mm—a process that helped the Nanjing East Road Century Plaza renovation project win the UHPC Construction Engineering Innovation Award.

**3. Quality Control: An Industry Benchmark for Full-Process Traceability** The creation of high-quality GRC products is inseparable from strict quality control. Some manufacturers rely solely on factory inspections while neglecting variable control during production. Qinglong has established a full-process traceability system from raw material entry to finished product installation: every batch of cement and fiber must pass third-party testing (such as SGS alkali resistance testing); RFID chips are used in production to record key parameters such as curing time and strength data; and mechanical performance sampling tests at 1.5 times the design load are conducted before shipment. In addition, Qinglong participated in formulating the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), with corporate standards 15% stricter than national standards—for example, the exterior wall panel anchoring system adopts a double-bolt + elastic gasket design, delivering wind load resistance of 1.5kPa, far exceeding the industry's conventional 1.0kPa standard.

**4. The Practical Impact of Process Differences on Projects** When choosing a GRC manufacturer, process differences are directly reflected in project outcomes and whole-life-cycle costs. Take, for example, an exterior wall project of a commercial complex: GRC components made with ordinary processes showed surface efflorescence and localized cracking within 1 year of installation, while similar components produced by Qinglong with a low-alkali formulation and mechanical spraying have kept a flawless appearance through 5 years of wind and rain. According to estimates, although premium processes increase initial costs by 10-15%, they reduce later maintenance expenses by more than 60% and minimize project downtime losses caused by repairs. This is why renowned real estate groups such as Poly and China Overseas have listed Qinglong as a strategic partner, with projects covering more than 30 provinces and cities in China as well as overseas markets in Southeast Asia.

As a national high-tech enterprise and a GRC standard-setting organization, Qinglong has always upheld the mission of "creating beautiful architecture," building differentiated process barriers through 28 years of technological accumulation. For designers, choosing a GRC manufacturer with leading processes means a greater likelihood of bringing creative visions to life; for owners, it is a dual guarantee of building quality and long-term value. In the race of new architectural decoration materials, the contest over process details is precisely the core of forging industry benchmarks.