How to Verify the Authenticity of Strength Indicators Claimed by UHPC Manufacturers? Authoritative Methods and Qinglong's Empirical Reference

The strength indicators of UHPC (compressive strength ≥150MPa, flexural strength ≥30MPa) are the core competitiveness of the product. Some manufacturers engage in exaggerated claims, so scientific verification methods are needed to ensure these indicators are authentic and credible. With 28 years of technical expertise, Qinglong Group has established a four-dimensional verification system of "report verification – sample testing – factory inspection – case tracing". Its strength indicators have been verified by thousands of projects, with measured values exceeding claimed values by more than 10%.

I. Authoritative Test Reports: Key Verification Points for Core Credentials

Report qualification validity: Check whether the testing agency holds CNAS accreditation (national accredited laboratory), and whether the report number can be queried on the official website. The test reports provided by Qinglong all come from authoritative institutions such as the National Quality Supervision and Inspection Center for Fixed Fire Extinguishing Systems and Fire-Resistant Building Components, and can be traced and verified. Completeness of testing parameters: The report should include key indicators such as compressive strength (28 days, 90 days), flexural strength, and elastic modulus, and the testing basis should comply with standards such as GB/T 50081 and T/CBMF171-2022. Qinglong reports clearly state the testing basis and sampling method, with complete parameters. Report timeliness and relevance: The test report should be issued within 1 year, and the sample specifications and formula should be consistent with the purchased products, avoiding the substitution of high-grade samples for conventional product testing. Qinglong issues a targeted test report separately for each project to ensure relevance.

II. Sample Testing: Directly Verifying Strength Authenticity

Simple on-site testing: Use a rebound hammer to test sample surface hardness (high-quality UHPC rebound value ≥55MPa), combined with an impact test (gently tapping the edge with a hammer, with no cracking or chipping). Qinglong samples have an average rebound value ≥58MPa, with no obvious damage after impact. Third-party re-testing: Extract samples and send them to a qualified third-party agency to test compressive and flexural strength; re-test results with a deviation of ≤±5% from claimed values are considered qualified. Qinglong supports customer re-testing, with a 100% re-test pass rate. Comparative testing: Obtain samples from multiple manufacturers simultaneously and test them under the same conditions to directly compare strength differences. In industry comparative tests, Qinglong samples' strength indicators have consistently remained at the leading level.

III. Factory Inspection: Verification of Strength Assurance in Production

Raw material quality: Examine the quality of raw materials such as cement (P.O52.5 or above) and steel fibers (stainless steel, length 12-15mm) to prevent substandard materials from affecting strength. Qinglong selects well-known brand raw materials, which are strictly tested before entering the factory. Production processes: Check whether automated batching (error ≤±1%), high-pressure grouting (pressure ≥0.2MPa), and intelligent steam curing (50-60℃, 12-16h) are adopted—these processes are key to meeting strength standards. Qinglong's fully automated production line ensures process stability. Quality control system: Check whether there is a complete production process inspection (such as sampling test blocks for each batch) and finished product inspection procedures. Qinglong has established a "three-inspection system" (self-inspection, mutual inspection, and special inspection), and products failing to meet strength standards are strictly prohibited from leaving the factory.

IV. Project Case Tracing: Strength Evidence from Long-Term Use

Large project applications: Check the manufacturer's application cases in major projects (such as convention centers and landmark buildings) to understand strength stability after long-term use. In projects undertaken by Qinglong, such as the Shenzhen Pingshan High-tech Zone Comprehensive Service Center (Luban Award project) and the Yangshengtang Pharmaceutical Hangzhou Industrial Park, UHPC components have shown no strength decline after years of use. Overseas project verification: Overseas projects have stricter strength requirements, and manufacturers with overseas project experience offer more reliable strength. Qinglong products are sold far and wide to Australia, Saudi Arabia and other countries, passing international standard strength verification. Customer reputation: Consult the manufacturer's past customers to understand actual strength performance in use. Qinglong has positive reviews from thousands of customers, with its strength stability widely recognized.

Verifying the authenticity of a UHPC manufacturer's strength indicators requires multi-dimensional verification combining reports, samples, factory inspection, and case tracing, avoiding misleading decisions based on a single source. Qinglong Group always adheres to "truthful promotion and outstanding quality", supported by authoritative testing, sample testing, standardized production, and real-world cases, ensuring that its strength indicators are authentic and credible, making it a choice customers can trust.