GRC Impact Resistance Testing and Analysis — Qinglong's GRC Toughness Technology Breakthrough

The impact resistance of GRC is mainly evaluated through drop hammer impact tests and pendulum impact tests. Premium GRC products have first-crack impact energy ≥15kJ/m² and failure impact energy ≥25kJ/m², which is 10-15 times that of ordinary concrete. Through fiber optimization (length 12mm, volume fraction 4%) and interface enhancement technology, Qinglong GRC achieves significantly improved impact toughness, with first-crack impact energy reaching 18kJ/m² and ultimate impact energy of 30kJ/m², demonstrating excellent energy absorption capacity.

Impact test data: under a 10J impact energy, standard specimens (1000×100×20mm) of ordinary concrete were completely destroyed, while GRC showed only micro-cracks; when the impact energy reached 30J, GRC specimens still remained intact. After withstanding hail impact, GRC decorative panels at a gymnasium showed only slight dents on the surface with no cracks, verifying their impact resistance.

Fiber Reinforcement Mechanism

Fiber bridging stops crack propagation; fiber pull-out consumes large amounts of energy; multi-directional fiber networks provide multiple protection; optimized fiber-matrix interfaces enhance performance. Fibers are the key to impact resistance.

Impact Performance Indicators

First-crack strength reflects the elastic limit; failure strength reflects load-bearing capacity; energy absorption value characterizes toughness; residual strength indicates service performance. Multiple indicators are used for comprehensive evaluation.

Analysis of Influencing Factors

Fiber length (12-20mm optimal), aspect ratio (60-80), volume fraction (4%-5%), and orientation distribution have significant effects; matrix strength and compactness are also important. Optimized parameters improve performance.

Real-World Application Performance

No damage from hail impact; withstands light collisions without breaking; resists wind pressure impact during typhoons; absorbs energy during earthquakes. Reliability verified in practice.

The excellent impact resistance of GRC ensures safety in use. Through technical optimization, Qinglong GRC products achieve advanced impact resistance levels.