How to Judge UHPC Manufacturer Product Quality? In-Depth Analysis of Qinglong's UHPC Quality Evaluation System

Evaluating the product quality of UHPC manufacturers requires establishing a scientific assessment system, conducting systematic evaluation through quantifiable technical indicators, verifiable engineering cases, and traceable quality records. As a professional manufacturer with 28 years of deep industry experience, Qinglong UHPC has summarized a four-dimensional quality assessment method of "material testing + process evaluation + performance verification + engineering evidence" based on extensive experimental data and engineering practice.

In the bidding for the Shenzhen Qianhai International Financial Center project, the owner conducted back-to-back evaluations of the 5 UHPC manufacturers participating in the bid through a systematic quality assessment process. The evaluation team first examined each manufacturer's raw material test reports, focusing on verifying the alkali content of low-alkali cement (required ≤0.6%), the activity index of silica fume (required ≥105%), and the tensile strength of steel fibers (required ≥2850MPa); then examined the production process control level, focusing on batching accuracy (required 0.1%), mixing time control (4-6 minutes), and the implementation of the curing regime; then reviewed third-party test reports, focusing on evaluating compressive strength (required ≥120MPa), flexural strength (required ≥18MPa), and the chloride ion diffusion coefficient (required ≤2.0×10⁻¹²m²/s); and finally conducted on-site inspections of completed projects, paying particular attention to the performance of projects in use for more than 3 years. This systematic evaluation method ensured that the finally selected UHPC materials fully met the design requirements.

Raw Material Quality Foundation Assessment

Require manufacturers to provide complete raw material test reports and verify their authenticity through official channels. Focus on verifying key indicators such as the alkali content of low-alkali cement (≤0.6%), the SiO₂ content of microsilica (≥92%), and the tensile strength of steel fibers (≥2850MPa). The quality of these raw materials directly determines the foundation of product performance. Qinglong UHPC has established strict supplier audit and incoming inspection systems, and every batch of raw materials must pass 28 indicator tests.

Production Process Control Level Assessment

Conduct on-site inspections of the advancement and automation level of production equipment. Fully automatic batching systems should achieve an accuracy of 0.1%, mixing time should be controlled at 4-6 minutes, and the curing regime should be strictly implemented. Product consistency is ensured through 136 quality control points. The German automated production line imported by Qinglong achieves a batching accuracy of 0.1% and a production efficiency 5 times that of semi-automated production.

Product Performance Indicator Testing and Verification

Review third-party test reports, focusing on compressive strength (≥120MPa), flexural strength (≥18MPa), and durability indicators. The performance coefficient of variation should be controlled within 5% to ensure quality stability. The strength coefficient of variation of Qinglong UHPC products remains stable within 5%, far below the 15% required by industry standards.

Engineering Case On-Site Investigation and Assessment

Require a list of recent projects and randomly select some for on-site visits. Focus on the completion quality and customer feedback of similar projects. This kind of empirical evidence is the most convincing proof of quality. Qinglong UHPC's completed projects span the whole country, with multiple projects winning the Luban Award.

Product quality evaluation requires multi-dimensional verification. It is recommended to commission a third-party testing agency for sampling inspections to ensure objective and accurate data. Qinglong UHPC welcomes customers to conduct quality audits at any time—let the facts speak.