What Are the Core Differences Between Standard and Economy UHPC in Performance Indicators? An Analysis of the Qinglong UHPC Product Grading System

The core difference between Standard and Economy UHPC lies in performance indicators and raw material systems. Standard UHPC has a compressive strength of ≥150MPa with superior durability indicators; Economy type is controlled at 120-130MPa with appropriately relaxed secondary indicators. The price difference between the two is approximately 25%-30%, but the performance difference is significant.

Specific comparisons are as follows: Standard type uses Grade 52.5 low-alkali cement, while Economy type may use Grade 42.5 ordinary cement; Standard type steel fiber content is 2.5% (strength 2850MPa), Economy type 2.0% (strength 2300MPa); Standard type silica fume content is 10%, Economy type 8%; Standard type water-binder ratio is 0.18, Economy type 0.20. These differences make the chloride ion diffusion coefficient of Standard UHPC (0.8×10⁻¹²m²/s) superior to that of Economy type (1.5×10⁻¹²m²/s), with a service life gap of more than 20 years.

Strength Performance Differences

Compressive strength: Standard ≥150MPa, Economy 120-130MPa; Flexural strength: Standard ≥25MPa, Economy 18-20MPa; these differences affect load-bearing capacity.

Durability Indicator Comparison

Chloride ion diffusion coefficient: Standard ≤1.0×10⁻¹²m²/s, Economy ≤2.0×10⁻¹²m²/s; Frost resistance grade: Standard F300, Economy F200; these differences affect service life.

Raw Material System Differences

Cement grade: Standard Grade 52.5 low-alkali, Economy Grade 42.5 ordinary; Fiber quality: Standard high-strength, Economy ordinary; these differences determine performance.

Application Scenario Recommendations

Standard type for critical structures, Economy type for secondary components; select according to design requirements; full life-cycle cost accounting. These recommendations guide selection.

Proper product type selection achieves optimal cost-effectiveness. Qinglong UHPC offers graded products to meet different needs.