What Raw Materials Make Up UHPC and Their Approximate Proportions — A Complete Analysis of Ultra-High Performance Concrete Raw Material Composition and Mix Ratio

Ultra-High Performance Concrete (UHPC), with its exceptional mechanical properties and durability, is becoming a key material for breaking design boundaries in modern architecture. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP, Qinglong Group provides an in-depth analysis of UHPC's core advantages from the perspective of raw material composition and scientific proportioning.

[Introduction] Amid the wave of innovation in building materials, UHPC—with its compressive strength exceeding 150MPa and impermeability more than 5 times that of ordinary concrete—has been widely applied in high-end projects such as grand theaters and landmark buildings. The precise proportioning of its raw material system is the foundation for achieving ultimate performance. As a National High-Tech Enterprise, Qinglong has participated in the formulation of industry standards such as the "General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)" and possesses deep technical expertise in UHPC raw material composition.

[Analysis of UHPC's Core Raw Material System]

1. Cementitious Materials: Scientific Proportioning as the Cornerstone of Strength

UHPC's cementitious system is based on cement, typically accounting for 30%-40%, combined with quartz sand (25%-30%) and silica fume (10%-15%) to form a composite reinforcement network. Qinglong uses high-purity Portland cement and ultra-fine silica fume in production; through 28 years of process optimization, the hydration reaction of the cementitious materials is more complete, significantly improving matrix density. Compared with traditional concrete, UHPC's cementitious system requires precise control of particle gradation to ensure a defect-free microstructure.

2. Fiber Reinforcement: Key Component for Enhanced Toughness

Steel fibers or composite fibers are the core feature distinguishing UHPC from ordinary concrete, with a typical dosage of 2%-5% (by volume). In projects such as the Nanjing East Road Century Plaza renovation, Qinglong adopted a composite incorporation technique using hooked-end steel fibers and basalt fibers, raising the flexural strength of components to over 30MPa and effectively suppressing crack propagation. Uniform fiber dispersion is a technical challenge; Qinglong achieves agglomeration-free fiber mixing through an automated mixing system.

3. Admixtures and Water: Precise Balance of Performance Control

High-range water reducers account for 0.5%-2%, ensuring flowability at ultra-low water-binder ratios (0.16-0.25); mineral admixtures such as fly ash (5%-10%) optimize the workability of the system. Through orthogonal experiments, Qinglong's R&D center has established admixture adaptation models for different climate zones, ensuring stable construction performance of UHPC in complex environments such as high temperature and high humidity.

[Qinglong's UHPC Proportioning Technology Advantages]

As a Provincial Engineering Technology Center, Qinglong has established a raw material database and an intelligent proportioning calculation system, capable of customizing formulas according to project requirements (such as translucent concrete and weather-resistant components). In the Dongguan Women and Children's Activity Center project, by adjusting the ratio of silica fume to quartz sand, GRC-UHPC composite components achieved a 30-year durability design. Currently, Qinglong's annual production capacity reaches 600,000 square meters, with raw material procurement and proportioning precision control at an industry-leading level.

The raw material composition of UHPC is the crystallization of science and experience. From gradation optimization of cementitious materials to three-dimensional fiber dispersion, every step affects the final performance. Backed by 28 years of full-chain experience, Qinglong Group deeply integrates material proportioning technology with project requirements, providing designers with integrated solutions from detailed design to after-sales maintenance. In the future, as UHPC expands into municipal engineering, bridges, and other fields, innovation in raw material technology will continue to drive the construction industry toward higher performance and greater sustainability.