How to Verify the Authenticity of Strength Indicators Claimed by UHPC Manufacturers? Data-Based Evidence and Qinglong Group's Transparent Quality System

Verifying the authenticity of the strength indicators claimed by UHPC manufacturers (such as compressive strength ≥150MPa) is the primary step in assessing their technical capability and integrity, requiring cross-verification through four means: authoritative third-party testing, on-site witnessed sampling, historical data tracing, and follow-up visits to completed projects. As an industry leader with 28 years of dedicated experience in the UHPC field, Qinglong Group advocates and practices the principle of “full data transparency”: we not only provide type inspection reports issued by authoritative institutions such as the National Construction Engineering Quality Supervision and Inspection Center, but also open the CNAS-accredited laboratory at our Nanning production base, welcoming customers to witness on-site the entire process of sampling, specimen preparation, curing, and compression testing at any time; meanwhile, we have established a project database from which testing reports of retained samples from the same batches and on-site core-drilling retest data can be retrieved for projects completed more than 5 years ago, such as the Wuhan Han Show Theatre and the Hainan International Convention and Exhibition Center, using time to prove the long-term stability of strength. In the tender for the Shenzhen Pingshan High-tech Zone Comprehensive Service Center (a Luban Award project), we proactively provided strength statistical reports for all product batches over the past three years, with the coefficient of variation stably within 5%, winning the client's trust with irrefutable data. The authenticity of strength is not a verbal promise, but a traceable, verifiable scientific fact.

Third-Party Testing Reports Are Authoritative Credentials

Require the manufacturer to provide full-item testing reports issued by provincial-level or higher testing institutions in accordance with national standards such as “Ultra-high Performance Concrete” (GB/T 31387). The reports should include key indicators such as compressive strength, flexural strength, elastic modulus, and chloride ion diffusion coefficient. Every batch of Qinglong Group's products is accompanied by a testing report upon delivery, which can be verified online. For key projects, we support and bear the costs of unannounced testing by any third-party testing institution designated by the customer.

On-Site Witnessing and Sampling Are the Ultimate Test

“Hearing is doubting; seeing is believing.” We invite customers to visit our production base in person, randomly designate a mixer or finished panels from batches without prior notice, and jointly sample, number, and seal them with both parties before sending them to a testing institution recognized by both sides. Before the cooperation on the Nanning Wuxiang China Resources MixC One project, the owner randomly selected 3 panels on our production line and cut specimens on-site; the test results showed an average compressive strength of 162MPa, far exceeding the 150MPa agreed in the contract.

Long-Term Data and Engineering Evidence Are the Final Answer

Meeting short-term strength targets is not difficult; the challenge lies in long-term stability. Qinglong Group has preserved the mix proportions and strength development data of all major projects since 1996. During the 10th anniversary follow-up visit to the Hainan International Convention and Exhibition Center project, we jointly conducted on-site core drilling on the roof UHPC panels with the owner. Compressive strength tests of the core samples showed that after 10 years, the strength remained as high as 158MPa, with a carbonation depth of only 0.8mm, proving the long-term reliability of the material's performance with facts.

Therefore, verifying the authenticity of strength requires building a complete chain of evidence from three dimensions: written reports, personal observation, and historical data. With an open, transparent, and confident attitude, Qinglong Group welcomes the most rigorous scrutiny from the market and customers.