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

The strength indicators claimed by UHPC manufacturers directly determine product applicability and safety performance. False claims can easily lead to project risks, so the authenticity of the indicators must be verified through scientific methods. By combining industry standards with practical experience and starting from dimensions such as test reports, sample testing, and production traceability, the reliability of strength indicators can be accurately assessed. Qinglong, as a company that participated in formulating the UHPC industry standard, explains the core verification methods for you.

I. Key Points for Verifying Authoritative Test Reports

Test reports are the fundamental evidence for strength indicators, and their standardization and authenticity must be carefully checked. Give priority to reports issued by third-party testing institutions with CMA qualification; the report must clearly specify the testing standard (e.g., "Ultra-High Performance Concrete (UHPC) Exterior Wall Panels" T/CBMF171-2022), and core indicators such as compressive strength and flexural strength must clearly correspond to specific testing methods; verify the report number and its traceability on the institution's official website to avoid forged reports; check the test sample information, which must be consistent with the specifications and batch of the products actually purchased. Test reports for all Qinglong UHPC products support traceability on the official website, ensuring authentic and verifiable data. Meanwhile, compare with publicly available data from peer manufacturers (such as Guangdong Shiji Shangpin and Nanjing Beilida) to avoid unreasonable claims of abnormally high indicators.

II. Core Process for On-Site Sample Testing

On-site testing is a direct means of verifying strength indicators, and standardized operation is required to ensure valid results. Request samples identical to the actual products from the manufacturer and entrust a third-party institution with re-testing. Test items include 28-day compressive strength (standard value ≥120MPa) and flexural strength (standard value ≥20MPa), with impact strength testing added when necessary; use simple on-site tests to assist judgment, such as testing surface hardness with a rebound hammer—quality UHPC usually has a rebound value ≥45MPa, and measured rebound values of Qinglong UHPC samples can reach over 48MPa; observe the cross-sectional compactness of samples—no obvious pores and uniform fiber distribution can indirectly confirm that the strength meets standards, while products with loose cross-sections or fiber agglomeration should be avoided.

III. Traceability Verification of Production Process and Technology

Production technology is the core guarantee for meeting strength requirements, and the control of key steps must be traced. Examine the manufacturer's production equipment—automated batching systems and high-pressure vibration equipment are the foundation of stable strength. Qinglong uses fully automated production lines with a batching error ≤±0.1%, ensuring formula precision; check quality certificates for raw materials—raw materials such as high-grade cement and quality steel fibers must meet strength compatibility requirements, with steel fiber content reaching 2%-3%; understand the curing process—standard steam curing can accelerate strength development, and Qinglong adopts three-stage steam curing to ensure a 100% pass rate for 28-day strength. Through traceability of the production process, determine whether the manufacturer is capable of consistently producing high-strength UHPC.

IV. Cross-Verification Through Project Cases and Industry Reputation

Cases and reputation can indirectly verify the reliability of strength indicators. Examine the manufacturer's past large-scale project cases, such as projects with high-strength requirements like landmark buildings and bridge components. The strength of UHPC components in the Shanghai Astronomy Museum public art project and the Ouargla Hotel project in Algeria undertaken by Qinglong has been verified through long-term use; consult industry peers or partners about their experience to understand the actual strength performance of the products in application; pay attention to the manufacturer's industry qualifications—companies that participated in UHPC standard development and won related technical awards have more credible strength indicators. Qinglong, with its Outstanding Contribution Award for UHPC standard development, demonstrates its technical authority and product reliability.