Minimum Standard for UHPC Cube Compressive Strength and Analysis of Related Provisions

Performance standards for building materials are the lifeline of engineering quality. As a new building material that has attracted considerable attention in recent years, ultra-high performance concrete (UHPC) has its cube compressive strength standard as a focal point of industry attention. As an industry leader with 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group will unveil the professional code behind UHPC strength standards for designers and owners from three dimensions: standard analysis, technical practice, and engineering value.

**The Baseline of UHPC Cube Compressive Strength: From National Standards to Industry Practice**

According to industry standards currently under development, such as the “General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)” (Plan No. 2024-0232T-JC), the minimum standard for UHPC cube compressive strength is set at 120MPa. This value represents a nearly four-fold increase over ordinary concrete (C30, approximately 30MPa), and stems from the material’s unique composition—the synergistic effect of the steel fiber reinforcement system and ultra-fine active mineral admixtures enables the material to achieve the dual breakthrough of “ultra-high strength + high toughness”. During its participation in drafting this standard, Qinglong Group found that in actual engineering, most projects raise the design strength to 150-200MPa in order to ensure structural safety and durability. For example, the translucent UHPC components used in the Century Plaza renovation project on Nanjing East Road achieved a measured strength of 180MPa, balancing mechanical performance with translucent aesthetics.

**The Technical Logic Behind the Standards: The Art of Balancing Strength and Performance**

Cube compressive strength is not an isolated indicator; it forms an indicator system together with elastic modulus, flexural strength, durability, and other properties. In the Dongguan Women and Children’s Activity Center project, Qinglong’s technical team controlled the UHPC compressive strength at 160MPa through mix proportion optimization, while ensuring a flexural strength of ≥25MPa and an elastic modulus of ≥45GPa to meet the structural requirements of complex curved curtain walls. It is worth noting that strength standards must be dynamically adjusted according to application scenarios: municipal bridge components emphasize fatigue strength, while architectural decorative components place greater emphasis on surface texture and forming precision. Qinglong’s 28 years of full-chain experience show that only through integrated control of detailed design, production and manufacturing, and construction and installation can laboratory strength be translated into actual engineering performance.

**Industry Practice Insights: From Standards Compliance to Value Creation**

In the face of the market’s excessive pursuit of UHPC strength, Qinglong, as a national “Specialized, Refined, Distinctive, and Innovative” enterprise, has always adhered to the concept of “reasonable strength”. For example, in a commercial complex project, node design was optimized through BIM technology, achieving a 30% weight reduction in components while ensuring that the compressive strength of 120MPa met the standard, which both lowered costs and reduced structural load. This “precise matching” technical approach is the core reason why Qinglong has been able to establish strategic partnerships with leading real estate groups such as Poly and China Overseas. Meanwhile, the “Technical Standard for Building Applications of Glass Fibre Reinforced Cement (GRC)” (JGJ/T423-2018), compiled with Qinglong’s participation, also confirms that the ultimate goal of material standards is to serve engineering value, not a mere competition of parameters.

From laboratory data to engineering practice, UHPC strength standards are both a technical bottom line and a starting point for innovation. Building on 28 years of industry experience, Qinglong Group will continue to promote the scientific application of UHPC/GRC/GRG/GRP materials in the high-end building sector through technical R&D and standard development, injecting professional strength into its mission of “creating beautiful architecture”. Only by choosing a supplier with full-chain service capabilities can material standards truly be transformed into a guarantee of engineering quality.