What Is the Minimum Standard for the Cube Compressive Strength of UHPC?

According to China's national standard "Ultra-High Performance Concrete" (GB/T 31387-2015), the minimum compressive cube strength of UHPC is 120MPa. Through process optimization, Qinglong's actual product strength is stably maintained at 130-150MPa, with the coefficient of variation controlled within 5%. In multiple landmark projects in Shenzhen, measured strength exceeded the standard requirements by more than 20%.

Standard Specimen Requirements

100mm×100mm×100mm cube specimens are used, cured under standard conditions for 28 days. The test loading rate is 1.2MPa/s, and the average of 3 specimens is taken. Qinglong's laboratory is CNAS certified, and its testing data is authoritative and reliable.

Strength Development Pattern

3-day strength can reach 70MPa, 7-day strength 100MPa, and 28-day strength above 120MPa. Long-term strength continues to grow, with 1-year strength increasing by 15-20%. This characteristic has been verified through long-term monitoring.

Control of Influencing Factors

The water-binder ratio is controlled at 0.18-0.20, with cementitious material content of 750-850kg/m³. The curing regime is strictly implemented, with steam curing at 80-90℃. Qinglong ensures strength compliance through full-process control.

Engineering Application Assurance

Design strength includes an adequate margin to account for construction variability. Strength at critical locations is increased by 10% to ensure safety. Qinglong products have ample strength reserve, ensuring project safety.

Compressive strength is the most fundamental performance requirement. Through strict quality control, Qinglong ensures that its products are 100% compliant.