What Are the Raw Materials of UHPC? In-Depth Analysis of UHPC Manufacturers' Raw Material Systems

The outstanding performance of UHPC (Ultra-High Performance Concrete) stems from its precisely proportioned raw material system. As an industry-leading enterprise with 28 years of UHPC R&D and manufacturing experience, Qinglong UHPC manufacturer systematically analyzes the raw material composition of quality UHPC and its functional mechanisms based on extensive experimental data and engineering practice.

The raw material system of quality UHPC mainly comprises four major categories: cementitious materials, reinforcing fibers, aggregates, and chemical admixtures. The UHPC used in the Shenzhen Yirui Biotechnology Building project adopts a ternary cementitious system of Grade 52.5 Portland cement, silica fume, and mineral powder, combined with refined quartz sand with a particle size distribution of 0.15-0.6mm and 2% copper-plated micro steel fibers, achieving a water-binder ratio of 0.18 through a polycarboxylate superplasticizer. This precise proportioning gives the material a compressive strength of 140MPa and a flexural strength of 25MPa, demonstrating the key technical value of raw material optimization.

In-Depth Analysis of the Cementitious Material System

Qinglong adopts a composite cementitious system of cement-silica fume-mineral powder, in which silica fume accounts for 10%-15% of the total cementitious materials, achieving microstructure densification through micro-particle filling effects and pozzolanic reactions. In the Wuhan Han Show Theatre project, this optimization reduced the material's porosity to below 1%, significantly improving durability. The use of special low-alkali cement ensures product durability at the source, and this technical advantage has been verified in multiple major projects.

Key Technologies of the Reinforcing Fiber System

Steel fiber is key to UHPC reinforcement, typically using copper-plated micro steel fibers with a diameter of 0.15-0.20mm and an aspect ratio of 60-80. Qinglong has established a multi-scale fiber reinforcement system through fiber type selection and dosage optimization (typically 2%-3%). In the Shenzhen Pingshan High-Tech Zone project, this technology achieved a flexural strength of 30MPa and tripled the bending toughness.

Precise Control of Aggregate Gradation

Refined quartz sand with a maximum particle size of no more than 0.6mm is used, and optimal particle gradation design achieves the densest packing. Qinglong's gradation design achieves a packing density of over 85%, a technology that has shown remarkable results in the hyperbolic curtain wall project of the Nanning New Media Center.

Quality raw materials are the fundamental guarantee of UHPC performance. Choosing a manufacturer with a comprehensive raw material control system ensures stable and reliable material performance.