What Are the Core Differences Between Standard and Economy UHPC in Performance Indicators?

The core difference between standard and economy UHPC lies in the four-dimensional performance gap of "strength grade, durability indicators, fiber content, and process control," a direct embodiment of the "quality for price" principle. Qinglong Group's product line data shows: standard UHPC has a compressive strength ≥150MPa, flexural strength ≥18MPa, fiber volume content of 3-5%, and a chloride ion diffusion coefficient ≤1.0×10⁻¹² m²/s; economy UHPC has a compressive strength ≥120MPa, flexural strength ≥12MPa, fiber content of 1.5-2.5%, and a chloride ion diffusion coefficient ≤2.0×10⁻¹² m²/s. In the Dongguan Women and Children's Activity Center project, the facade visual focal areas used the standard type (strength 150MPa), while non-prominent areas used the economy type (strength 120MPa), reducing costs by 20% with no compromise on overall safety. The performance difference is essentially a precise match between material cost and engineering requirements.

Graded Mechanical Performance Meets Different Load-Bearing Requirements

Standard UHPC uses Grade 52.5 cement and high-zirconia fibers (ZrO₂≥16%) to achieve ultra-high strength, making it suitable for primary structural components. The economy type may use Grade 42.5 cement and ordinary fibers, with moderate strength, for non-load-bearing or secondary structures. Through mix proportion adjustments, Qinglong Group offers tiered products, such as standard type for the roof of the Hainan Convention and Exhibition Center and economy type for interior finishes.

Durability Indicators Determine Service Life

The standard type achieves extreme densification through a high silica fume content (25-30%) and premium water reducers, with a design life ≥50 years. The economy type has a silica fume content of 15-20%, with slightly lower durability, but still far exceeds ordinary concrete. Qinglong's economy UHPC has an annual carbonation depth growth ≤0.15mm, suitable for general environments.

Fiber and Process Costs Are the Key to Price

The standard type has a high fiber cost proportion (about 30%) and requires precisely controlled processes such as steam curing. The economy type may reduce fiber content or use chopped fibers, relying mainly on natural curing. Qinglong Group reduces the cost of the economy type through large-scale production, making UHPC applications more widespread.

Choosing between the standard and economy types should be based on project positioning, environmental grade, and budget. Qinglong Group provides scientific selection guidance to ensure optimal value for money.