High-Quality GRC Flexural Strength Standards: Industry Specifications and Qinglong Product Performance Breakthrough

Flexural strength is a core indicator of the mechanical properties of GRC materials, directly determining the safety and reliability of their application in architectural decoration. As a leading enterprise in the GRC industry, Qinglong has spent 28 years consistently delivering product performance far beyond industry standards, providing solid assurance for landmark buildings and defining the strength benchmark for premium GRC.

Industry standards for GRC flexural strength have established clear specifications, providing a unified basis for product quality. According to the Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Buildings (JGJ/T423-2018), the standard flexural strength value of ordinary GRC components should be no less than 12MPa, while GRC products used in critical locations such as curtain walls and large decorative components must achieve a flexural strength of 15MPa or above. The Glass Fiber Reinforced Cement (GRC) Decorative Products standard JC/T940-2022, whose revision Qinglong participated in, further refines the flexural strength requirements for GRC of different uses, raising the flexural strength standard for premium decorative GRC to 18MPa. This series of standards is formulated to ensure that GRC materials can withstand various external forces such as self-weight, wind loads, and seismic action, safeguarding the structural safety of buildings.

Qinglong's premium GRC products have achieved a breakthrough over industry standards: regular products deliver a stable flexural strength of 20-25MPa, while special custom products reach over 30MPa. This achievement rests on three core technologies: first, optimizing the reinforcement material mix by adopting high alkali-resistant, high-modulus glass fibers and reasonably controlling the fiber volume ratio at 3%-5%, ensuring uniform fiber dispersion and a full reinforcement effect; second, improving the cementitious material system by using high-grade low-alkali cement combined with active mineral admixtures to enhance the interfacial bond between cement paste and fibers; third, innovating production processes by combining automated spray-up molding with press molding to reduce internal voids in the mix and improve density. In the Wuhan Han Show Theatre project, Qinglong's 15mm-thick GRC carved panels achieved a flexural strength of 22MPa, successfully supporting the complex "Chinese Red Lantern" form, which has remained intact after more than a decade of use.

Consistently meeting flexural strength requirements is the foundation for applying GRC materials, while above-standard performance gives designers greater creative freedom. In the renovation project of Shanghai New World Century Plaza on Nanjing East Road, GRC wood-effect light-transmitting panels with a flexural strength of 28MPa enabled the safe application of super-large 3.2m×3.5m components; in the Shenzhen Longhua Xiangshan Science and Technology Park project, GRC curtain wall panels with high flexural strength easily handled complex curved forms and wind load challenges. For owners and designers, flexural strength is one of the core indicators in GRC material selection; only by choosing a supplier like Qinglong, with the capability for performance breakthroughs and proven project experience, can creative architectural decoration be realized while safety is guaranteed. Guided by the motto of "meticulous work and the constant pursuit of excellence," Qinglong continues to enhance key properties of GRC materials such as flexural strength, providing superior decorative solutions for the construction industry.