An Overview of Well-Known UHPC Manufacturers in China and Analysis of Their Market Competitiveness

The performance of building materials is a core factor determining structural safety and aesthetics, and flexural strength, as a key indicator of GRC materials, directly relates to the load-bearing capacity and service life of components. As an industry leader with 28 years of dedicated expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group will analyze the flexural strength standards of quality GRC and its full-chain quality control system for designers and owners from the perspectives of industry standards, technical requirements, and practical applications.

I. Industry Standards and Technical Requirements for GRC Flexural Strength

According to the Technical Standard for Building Applications of Glass Fibre Reinforced Cement (GRC) (JGJ/T423-2018), the flexural strength of quality GRC components should be no less than 12MPa, while high-performance GRC products can reach over 20MPa. This indicator is determined through the three-point bending test and must meet testing requirements after 28 days of curing under standard conditions (temperature 20±2°C, relative humidity ≥95%). As a participating drafter of this standard, Qinglong strictly implements it in production, while applying an internal quality control system that exceeds national standards, ensuring that product flexural strength remains stable within the 15-25MPa range, far exceeding the basic requirements.

II. Core Technical Factors Affecting GRC Flexural Strength

Achieving compliance in flexural strength is not determined by a single parameter, but is the result of the combined effects of material formulation, production process, and quality control. In raw material selection, Qinglong uses high-purity rapid-hardening sulphoaluminate cement and alkali-resistant glass fibres (content ≥4.5%), ensuring uniform fibre distribution through its independently developed fibre dispersion technology to avoid localized stress concentration. In the forming process, the spray-vacuum dewatering process is adopted, increasing component density by 30% and achieving a flexural elastic modulus of 15-25GPa, effectively enhancing flexural performance. In addition, the nano-silica sol modification technology developed by Qinglong's provincial-level R&D center has further increased product flexural strength by 15% while optimizing durability.

III. Application and Verification of Flexural Strength in Actual Projects

In large public buildings, the flexural strength of GRC components directly affects their safety and economy. Taking the exterior wall project of a landmark building undertaken by Qinglong as an example, the super-large 2.4m×1.2m GRC cladding panels needed to bear self-weight, wind loads, and thermal stress. By controlling the flexural strength at 22MPa, together with an anchoring system optimized using BIM technology, a 40% weight reduction per panel was achieved while meeting deformation requirements under a 1500Pa wind pressure. In addition, in the renovation project of Century Plaza on Nanjing East Road, translucent GRC components, through the coordinated design of flexural strength and light transmittance, ensured structural safety while achieving artistic nighttime lighting effects; the project won the Silver Award of the AALBORG WHITE Cup UHPC Construction Engineering Innovation Award.

IV. Key Considerations for Choosing a Quality GRC Manufacturer

For real estate developers and designers, choosing a GRC manufacturer with full-chain capabilities is essential to ensuring that flexural strength requirements are met. As a national high-tech enterprise, Qinglong possesses a complete system ranging from material R&D (58 patented technologies) and detailed design (a BIM + parametric design team) to production and construction (annual capacity of 600,000㎡), and can provide third-party test reports for key indicators such as flexural strength, with full life-cycle traceability enabled by RFID chips. Compared with peers such as Shiji Shangpin and Shantaixin Industrial, Qinglong holds greater advantages in the strength control of complex-shaped components; for example, double-curved GRC components can achieve a minimum radius of curvature of 300mm while maintaining flexural strength above 18MPa.

Flexural strength is the lifeline of GRC materials and the bottom line of building safety. Qinglong Group's 28 years of technical accumulation are reflected not only in strict adherence to industry standards, but also in the continuous improvement of product performance through innovative technologies. Whether for the curved curtain walls of grand theatres or the special-shaped decorations of commercial complexes, choosing quality GRC materials with compliant flexural strength is both a perfect presentation of design creativity and a long-term commitment to building safety. As a participant and leader in GRC industry standard-setting, Qinglong will continue to uphold the philosophy of "meticulousness and the pursuit of excellence" to provide material solutions combining strength and aesthetics for building projects worldwide.