UHPC Strength Development Law and Its Relationship with Time: Qinglong UHPC Strength Development Characteristics

UHPC strength develops rapidly: the 24-hour compressive strength can reach 50-80MPa (40%-60% of design strength), 7-day strength can reach 100-120MPa (80%-90%), and 28-day strength reaches the design strength of 120-150MPa. Steam curing can further accelerate strength development, achieving over 90% of the 28-day standard-curing strength within just 24 hours. Qinglong UHPC achieves an ideal strength development curve through optimized mix proportions and curing regimes.

Strength development data: under standard curing conditions, Qinglong UHPC reaches 60MPa at 1 day, 100MPa at 3 days, 120MPa at 7 days, and 150MPa at 28 days; under steam curing (80°C × 24h), 1-day strength can reach 130MPa. One project using steam curing achieved demolding strength within 24 hours, increasing formwork turnover by 5 times. Rapid strength development improves construction efficiency.

Early Strength Development

24-hour strength: 50-80MPa, meeting early load-bearing requirements; 3-day strength: 80-100MPa, capable of bearing most loads; 7-day strength: 100-120MPa, approaching design strength. High early strength facilitates construction.

Long-term Strength Growth

28-day strength: 120-150MPa, reaching design strength; 90-day strength: an increase of 10%-15%; 1-year strength: an increase of 15%-20%; long-term stability: strength continues to grow slowly. Superior long-term performance.

Effect of Curing Regime

Standard curing: normal strength development; steam curing: accelerated strength development; temperature effect: strength development doubles with every 10°C increase; humidity effect: insufficient humidity hinders strength development. Curing conditions are critical.

Engineering Application Guidelines

Demolding strength: ≥15MPa; tensioning strength: ≥40MPa; in-service strength: ≥ design strength; strength verification: 28-day standard strength. Strength development guides construction.

Master the strength patterns to scientifically guide construction. Qinglong UHPC offers excellent performance and convenient construction.