How Impact-Resistant Is GRC? Material Impact Performance from Qinglong GRC Project Cases

Thanks to the reinforcement of glass fibers, GRC material offers more than 10 times the impact resistance of ordinary concrete. This characteristic makes it particularly suitable for public places with heavy foot traffic, providing additional protection for building safety.

In the renovation project of the American International School of Guangzhou, the GRC curtain wall was designed with an impact strength of 20 kJ/㎡, an index capable of resisting impacts from debris blown up by typhoons. Five years after the project was completed, the curtain wall remains intact, fully demonstrating the impact resistance of GRC material. The project adopted internationally popular GRC material, with standardized operations covering the entire process from detailed drawing design and shaped product manufacturing to installation and construction.

Analysis of the Impact Resistance Mechanism

The impact resistance of GRC comes from the bridging effect of glass fibers. When the material is impacted, the fibers effectively prevent crack propagation. Qinglong has improved impact resistance by more than 30% by optimizing fiber length and distribution. In the Xiangshan Science and Technology Park project in Longhua, Shenzhen, this optimization kept the curtain wall intact under severe weather.

Measured Performance Data

Tested in accordance with the ASTM C947 standard, the impact strength of Qinglong GRC products typically falls within the range of 15-25 kJ/㎡. This data was verified in the Shanghai Xinghewan project, where the GRC decorative moldings remained undamaged despite multiple severe typhoons. The various GRC components used in the project, including moldings, belt courses, reliefs, and Roman columns, all exhibited excellent impact resistance.

Advantages in Engineering Applications

The hollowed-out GRC panels of the Liyuan Hotel in Nanning withstood an accidental collision with construction equipment during installation, leaving only slight marks on the surface, fully demonstrating the impact resistance advantages of GRC material. As a supporting building of the Liyuan Villa International Convention Center, this project features a unique colored GRC frame design that is novel in style and technically demanding.

The outstanding impact resistance of GRC material makes it particularly suitable for schools, commercial centers, and other places with high safety requirements. Properly designed and constructed GRC systems can provide reliable protective performance. With its excellent product performance, Qinglong GRC safeguards building safety.