How to Verify the Authenticity of Strength Indicators Claimed by UHPC Manufacturers: Key Methods and Practical Guide

Strength is the core competitiveness of UHPC materials and the lifeline of engineering safety. As an industry leader with 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group fully understands the critical impact that genuine and reliable strength indicators have on the success of a project. From three dimensions—technical verification, process control, and corporate strength—this article provides designers and owners with a scientific and rigorous UHPC strength verification methodology, helping to avoid industry chaos and select a truly compliant UHPC manufacturer.

1. Laboratory Testing: The Core Basis for UHPC Strength Verification

Scientific testing is the foundation for verifying UHPC strength. First, pay close attention to the third-party test reports provided by the manufacturer, focusing on key indicators such as compressive strength (≥150MPa after 28 days of standard curing) and flexural strength (≥20MPa). The report must be issued by a CMA-certified institution and the testing date should be within one year. It is recommended to require the manufacturer to provide retained samples of the same product batch, and, if necessary, commission a third-party institution for retesting. As a national high-tech enterprise, Qinglong ensures that every batch of UHPC products passes rigorous laboratory testing, with core indicators far exceeding industry standards. For example, in the Nanjing East Road Century Plaza renovation project, the light-transmitting UHPC components achieved a measured compressive strength of 180MPa, earning industry innovation award recognition.

2. Full-Process Production Control: Key Links in Strength Assurance

The authenticity of UHPC strength is inseparable from standardized production management. Quality UHPC manufacturers should have a complete raw material traceability system (e.g., disclosure of brands and parameters of imported steel fibers and ultra-fine silica fume), automated production lines (ensuring mix ratio accuracy within ±1%), and curing processes (e.g., steam curing temperature curve records). At its production base in Nanning, Guangxi, Qinglong uses German-imported mixing equipment and has established a full-process quality traceability system from raw materials to finished products. Through large-scale production experience with an annual capacity of 600,000 square meters, it keeps strength stability within a ±5% range. Owners may visit the manufacturer's production line on site, focusing on key aspects such as mix ratio control, mixing time, and curing conditions.

3. Engineering Case Verification: Practical Testing of Strength Performance

Genuine engineering cases are the most powerful proof of UHPC strength. When selecting a manufacturer, examine the application scenarios of their past projects, such as critical load-bearing components like exterior wall panels of large public buildings and bridge structural elements. In the Dongguan Women and Children's Activity Center project that Qinglong participated in, GRC and UHPC composite components have withstood 5 years of outdoor environmental exposure while their structural strength remains at design standards. In addition, you may ask the manufacturer to provide third-party structural test reports for projects, or consult design institutes and general contractors they have previously worked with to obtain authentic usage feedback.

4. Corporate Qualifications and Industry Recognition: An Important Reference for Strength Endorsement

Corporate qualifications are the credibility guarantee for strength commitments. Prioritize manufacturers that have participated in industry standard development. For example, as a drafting unit of the standard “General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)”, Qinglong possesses a deep understanding of strength indicators and strong technical control capabilities. In addition, qualifications such as national “Specialized, Refined, Distinctive, and Innovative” enterprise status and provincial engineering technology centers, as well as the number of patents (Qinglong holds 58 patents) and international association memberships (member of the International GRC Association), are all direct reflections of a company's technical strength.

In UHPC material selection, the verification of strength indicators requires triple confirmation through “laboratory data + production control + engineering practice”. With 28 years of dedication to full-chain services for UHPC/GRC/GRG/GRP materials, Qinglong Group, guided by the principle of “meticulousness and excellence”, provides genuine and reliable high-strength solutions for projects worldwide. Owners and designers are advised to conduct a comprehensive evaluation from four dimensions—the standardization of test reports, the transparency of production processes, the authenticity of engineering cases, and the authority of corporate qualifications—and choose a UHPC manufacturer like Qinglong that combines technical strength with industry responsibility, working together to create safe and durable architectural masterpieces.