What Is the GRC Production Process? A Comprehensive Breakdown and Key Steps Guide

In the field of modern architectural decoration, GRC (Glass Fiber Reinforced Concrete) has become the ideal choice for high-end projects such as grand theaters, commercial complexes, and landmark buildings, thanks to its lightweight high strength and flexible shaping capabilities. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group will comprehensively unveil the production secrets of GRC—from material properties and production processes to quality control—providing professional reference for designers and owners.

The core of the GRC production process lies in the precise control of material proportions and forming technology. Its main raw materials include high-strength cement, alkali-resistant glass fiber, fine aggregates, and additives, where the proportion of glass fiber directly affects the product's flexural strength (premium GRC can reach over 20MPa). Through 28 years of technical accumulation, Qinglong has developed a unique proportioning scheme that ensures material lightweighting (weighing only 1/4 of traditional stone) while meeting the structural stability requirements of complex shapes. In the mixing stage, planetary mixers are used to achieve uniform dispersion of fibers and matrix materials, avoiding the strength loss caused by fiber clumping in traditional processes.

Mold design and fabrication are key steps in GRC production, directly determining product precision and surface texture. Qinglong employs BIM technology and parametric design software (such as Rhino and Grasshopper) to achieve complex shapes such as double-curved surfaces and openwork reliefs with a minimum curvature radius of ≤300mm. Mold materials—fiberglass or silicone—are selected according to project requirements, with silicone molds particularly suitable for European classical components with fine textures (such as Roman columns and cornices). The production base is equipped with automated production lines with an annual capacity of 600,000 square meters, using 3D scanning positioning technology to ensure that errors in mold reuse are controlled within ±1mm.

The forming and curing processes directly affect the durability of GRC components. Qinglong adopts a process combining spray-up forming and premix casting: spray-up forming is suitable for thin-walled components, using high-pressure spray guns to uniformly attach fibers and mortar to the mold; premix casting is used for large load-bearing components to ensure concrete density. The curing stage combines steam curing with natural curing, promoting hydration reactions in a constant temperature and humidity environment, enabling products to reach a 28-day compressive strength of over 80MPa. Notably, the "Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC)" (JGJ/T423-2018), which Qinglong participated in formulating, clearly specifies curing cycles and environmental parameters, setting an industry quality benchmark.

Quality inspection and full-process control are the last line of defense in GRC production. Each batch of products must undergo more than 20 indicator tests, including flexural strength, elastic modulus, and frost resistance, among which weather resistance testing simulates extreme environment cycles from -40℃ to 70℃ to ensure stability under different regional climate conditions. As a national high-tech enterprise, Qinglong has established a comprehensive quality traceability system, recording full lifecycle data from raw materials to installation through RFID chips. Among project cases, the Dongguan Women and Children's Activity Center GRC curtain wall project won the Silver Award of the First GRC Building Engineering Innovation Award for its zero-error installation and outstanding durability. For more industry information: +WeChat qlfsbl123

From material R&D to project implementation, every step of the GRC production process embodies technical accumulation and professional craftsmanship. With the mission of "Creating Beautiful Architecture," Qinglong Group perfectly combines GRC's artistic expressiveness with structural safety through full-chain services covering detailed design, manufacturing, construction and installation, and after-sales maintenance. Whether it is the minimalist curtain walls of modern architecture or classical-style decorative moldings, GRC, with its unique advantages, has become an important vehicle for architectural designers to realize their creativity, driving the innovative development of the architectural decoration industry.