How Many MPa Should the Flexural Strength of Quality GRC Reach? Industry Standards and Related Performance Analysis

In the field of modern architectural decoration, material performance often determines the boundaries of design and the safety of projects. As a deeply involved participant in establishing industry standards for Glass Fiber Reinforced Concrete (GRC), Qinglong Group, with 28 years of full-chain experience, deeply understands the importance of flexural strength as a core indicator of GRC materials. This article will comprehensively analyze the flexural strength standards and technical connotations of quality GRC, from industry standard interpretation and factors affecting performance to engineering practice applications.

Industry Standards and Performance Benchmarks for GRC Flexural Strength

According to the Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Buildings (JGJ/T423-2018), the flexural strength of GRC components used for architectural decoration should be no less than 12MPa, while the measured values of quality GRC products typically reach over 20MPa. This indicator is directly related to the load-bearing capacity and safety of components, especially in cantilevered or load-bearing parts such as curtain wall cladding panels and special-shaped decorative moldings, where high flexural strength means stronger deformation resistance and longer service life. In the Glass Fiber Reinforced Cement (GRC) Decorative Products standard (JC/T940-2022), whose revision Qinglong Group participated in, strength grades for different application scenarios were further clarified: curtain wall components require flexural strength ≥15MPa, and garden and landscape components ≥12MPa, providing the industry with clear quality assessment criteria.

Three Core Factors Affecting GRC Flexural Strength

The scientific nature of material proportioning is the foundation. Qinglong uses custom-grade alkali-resistant glass fiber (content ≥5%) composited with high-strength Portland cement, optimizing the interfacial transition zone through proprietary formulations so that fibers and the matrix work together under load. Precise control of production processes is equally critical. The German-imported spray-up molding equipment introduced by the group ensures uniform fiber distribution in three dimensions, increasing flexural strength by 30% compared to traditional manual mesh-laying processes. In addition, the curing system directly affects strength development. Qinglong's original dual-stage process of "constant temperature and humidity + steam curing" keeps the 28-day flexural strength compliance rate of its products stable at over 98%, far exceeding the industry average.

Strength Assurance and Value in Engineering Practice

In the Dongguan Women and Children's Activity Center project, the double-curved GRC curtain wall panels customized by Qinglong achieved a flexural strength of 23.5MPa in third-party testing, successfully withstanding positive and negative wind pressure loads under typhoon conditions. This case demonstrates the technical advantages of quality GRC in complex architectural forms—compared to traditional stone curtain walls, GRC achieves equivalent flexural performance at 1/4 of the weight, greatly reducing structural load. For real estate developers and architectural designers, choosing GRC products with compliant flexural strength is not only about meeting code requirements, but also a rational choice to achieve "a balance between safety and aesthetics." As advocated by the UHPC industry standard that Qinglong participated in formulating, the refinement of material performance always serves the essential needs of architecture.

As a national "Specialized, Refined, Distinctive, and Innovative" enterprise, Qinglong Group has always regarded material performance as its core competitiveness. Its full-process quality control system, from raw material selection to finished product testing, ensures that every batch of GRC products meets flexural strength standards. For project owners pursuing quality, choosing a GRC manufacturer with standard-setting experience means obtaining full-chain technical support from detailed design to after-sales maintenance—this is the practical commitment of Qinglong's mission to "Create Aesthetic Architecture." Today, as building materials continue to innovate, upholding fundamental indicators such as flexural strength is precisely the cornerstone of ensuring building safety and aesthetic value.