How Strong is GRC? Authoritative Data Analysis of Qinglong GRC Strength Performance

The strength performance of GRC (Glass Fiber Reinforced Cement) is an important embodiment of its core value. According to the national standard GB/T 15231-2008, high-quality GRC can achieve a flexural strength of 18-30MPa, an impact strength of 15-25kJ/m², and an elastic modulus of 15-25GPa. As a professional manufacturer with 28 years of deep industry experience, Qinglong GRC can clearly state, based on extensive experimental data and production practice: through optimized material proportions and advanced production processes, the strength performance of its products remains consistently at the industry-leading level.

In the Shenzhen Yirui Biotechnology Building project, the Qinglong GRC curtain wall panels used were tested by the National Building Materials Testing Center and achieved a flexural strength of 25MPa, exceeding the standard requirement by 38.9%. This high strength performance allows a 12mm-thick GRC panel to meet the wind pressure resistance requirements of curtain walls. Compared with traditional 20mm-thick panels, the weight is reduced by 40%, effectively lowering the load on the main structure. The spray-up process adopted in the project, through precise control of fiber content (cement:sand:fiber = 1:1:0.04) and three-dimensional random distribution, enables the material to effectively prevent crack propagation under load, exhibiting excellent toughness characteristics.

Ultimate Flexural Strength Performance

The flexural strength of high-quality GRC typically remains above 18MPa and can reach 25-30MPa through mix proportion optimization. Under standard curing conditions, Qinglong GRC products achieve 70% of their 28-day flexural strength within just 7 days. This early strength development characteristic helps shorten construction periods. Under long-term loading, the strength retention rate can exceed 95%, demonstrating excellent durability.

Tensile Strength Characteristics

The tensile strength of GRC is approximately 60%-70% of its flexural strength, with high-quality products reaching 10-15MPa. Its stress-strain curve exhibits a distinct pseudo-strain-hardening characteristic, with an ultimate tensile strain of up to 0.3%-0.5%, more than 10 times that of ordinary concrete. This characteristic gives GRC components a better safety reserve when subjected to accidental loads.

Compressive Strength Data Support

Although GRC mainly uses flexural strength as its design index, its compressive strength can also reach 40-60MPa, fully meeting the load-bearing requirements of decorative components. In special applications requiring load-bearing capacity, the requirements can be met by increasing thickness or adding stiffening ribs. The ratio of axial compressive strength to cube compressive strength is 0.85-0.95, higher than that of ordinary concrete.

Strength Stability Verification

The strength dispersion coefficient is an important indicator for measuring product quality stability. Through automated production lines and strict process control, Qinglong GRC keeps the strength dispersion coefficient of its products stable within 5%, with the strength variation coefficient not exceeding 3% in mass production. This stability ensures safety and reliability in engineering applications.

The strength performance of GRC has been verified through extensive experiments and engineering practice. Selecting high-quality products and applying them correctly can fully leverage their advantages of light weight and high strength, offering more possibilities for architectural creation. It is recommended to engage a third-party testing agency for strength verification in important projects to ensure that material performance meets design requirements.