How Strong Is GRC? Mechanical Properties and Engineering Verification of Qinglong Materials

Strength is the core performance of GRC materials, directly determining building safety and service life. When selecting GRC, one of customers' foremost concerns is “How strong is GRC?” After all, as an architectural decorative material, insufficient strength may lead to safety hazards such as cracking and falling off. As an enterprise that participated in formulating the GRC industry standard, Qinglong has drawn on 28 years of technical expertise to give its GRC materials excellent mechanical properties. Their strength has been verified through scientific testing and numerous major projects, making them an industry benchmark for strength.

## Leading core strength parameters, far exceeding industry standards????

The strength advantage of premium GRC is first reflected in its core mechanical parameters. Qinglong strictly follows the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC), and through scientific formulations and advanced processes, keeps the flexural strength of its GRC materials stable above 20MPa—far exceeding the industry average—while tensile strength and impact strength also perform excellently. Ordinary cement products, lacking fiber reinforcement, have poor flexural performance and are prone to cracking. Qinglong GRC, however, incorporates high-grade alkali-resistant glass fibers to form a uniform fiber reinforcement network, greatly improving the material's toughness and load-bearing capacity. Testing by authoritative third-party institutions shows that the failure load of Qinglong GRC components is more than 3 times the design load, fully meeting the structural safety requirements of large buildings.

## Reinforcement processes that guarantee strength stability

The strength of GRC depends not only on the material itself but also on mature production processes. Qinglong uses an automated batching system to precisely control the ratios of cement, aggregates, and alkali-resistant glass fibers, ensuring uniform and consistent strength in every batch of GRC material. For forming, spray-up or premix forming is applied according to component type, so that fibers are evenly distributed within the material, avoiding localized weak strength. Steam curing accelerates GRC strength development while enhancing strength stability and preventing later-stage strength decline. For large irregular components, Qinglong also carries out specialized structural design, increasing fiber content or embedding reinforcement ribs at critical locations to further enhance local strength and ensure the safe use of complex-shaped components.

## Proven in major projects, strength that stands the test

Beyond laboratory data, real-world engineering application is the most powerful proof of GRC strength. Qinglong's GRC materials have been applied in numerous large public buildings and high-end projects, demonstrating stable strength performance over long-term use. The 15mm ultra-thin GRC carved panels at the Wuhan Han Show Theatre, serving as exterior wall decorative components, must not only bear their own weight but also withstand wind and rain loads—after more than a decade of use, they remain free of cracking and deformation. The 30,000-square-meter GRC curtain wall of the Shenzhen Pingshan High-tech Zone Comprehensive Service Center features large individual panels that must bear wind loads and seismic forces after installation; in the years since project completion, their strength has remained stable, passing multiple safety inspections. The GRC irregular double-curved panels at Hainan Poly Peninsula No. 1 reach a maximum size of 6000mm×3000mm, and their outstanding strength performance enabled safe installation and long-term use. These project cases fully demonstrate that the strength of Qinglong GRC fully meets the safety requirements of all types of buildings.

The strength of GRC is the bottom line of building safety, and choosing GRC materials with reliable strength is key to a project's success. With leading core parameters, mature reinforcement processes, and real-world verification in numerous major projects, Qinglong has proven the strength advantage of its GRC materials. For customers who value safety and quality, Qinglong GRC not only enables creative shapes but also safeguards building safety with solid strength performance, keeping projects running stably over the long term.