What Are the Raw Materials of UHPC? Core Components and Quality Requirements Explained

The exceptional performance of UHPC stems from the scientific formulation of "premium cement + high-strength fibers + fine aggregates + mineral admixtures." Every raw material directly affects the final strength, durability, and plasticity. Qinglong rigorously selects core raw materials to ensure consistent quality from the source for projects such as the Shanghai Astronomy Museum and Yangshengtang Pharmaceutical.

I. Core Raw Materials: Four Indispensable Components

Four core components form the foundation of UHPC. Cementitious materials: low-alkali Portland cement of grade 52.5 or above is selected to provide the strength foundation; Qinglong gives priority to specialty cement that complies with national standards. Reinforcing fibers: primarily alkali-resistant steel fibers (diameter 0.1-0.2mm, length 12-18mm) at a dosage of 2%-3%; Qinglong fibers have a tensile strength of ≥2800MPa. Aggregate system: 0.15-0.3mm quartz sand with optimized grading to fill voids; Qinglong's natural quartz sand has a purity of ≥98%. Mineral admixtures: silica fume (dosage 10%-15%) + fly ash to improve density and durability; Qinglong has independently developed a synergistic admixture formulation.

II. Raw Material Quality Requirements: Details Determine Performance

Premium raw materials are screened under strict standards. Cement requirements: low alkali content (≤0.6%) and high activity to prevent alkali-aggregate reaction; all Qinglong cement passes alkali content testing. Fiber requirements: qualified alkali resistance, good dispersibility, and no agglomeration; Qinglong fibers undergo special surface treatment, achieving 98% dispersion uniformity. Aggregate requirements: uniform particles free of impurities, with moisture content ≤0.5%; Qinglong aggregates are washed and dried. Admixture requirements: silica fume specific surface area ≥20000m²/kg and activity index ≥95%; Qinglong selects premium industrial-grade silica fume.

III. Qinglong's Raw Material Control: Quality Assured from the Source

Raw material quality is controlled throughout the entire process. Supplier screening: long-term cooperation with renowned domestic and international raw material manufacturers under signed quality agreements; all Qinglong raw material suppliers undergo rigorous qualification review. Incoming inspection: every batch of incoming raw materials is tested for strength, alkali content, dispersibility, and more, with zero acceptance of substandard materials; Qinglong's raw material testing coverage rate is 100%. Formulation optimization: raw material proportions are adjusted according to project needs—for example, fiber content is increased in coastal projects to enhance corrosion resistance; Qinglong customized a salt-fog-resistant formulation for the Ouargla hotel project in Algeria. High-quality raw materials are the foundation of UHPC performance. With "rigorously selected materials + precise formulation," Qinglong creates high-performance UHPC products.