GRC Strength Performance Analysis — Detailed Explanation of Qinglong GRC Strength Technical Indicators

The strength performance of GRC (Glass Fiber Reinforced Cement) mainly includes four key indicators: flexural strength, compressive strength, tensile strength, and elastic modulus. High-quality GRC products should achieve a flexural strength of 18-25MPa, compressive strength of 40-60MPa, tensile strength of 7-10MPa, and elastic modulus of 20-25GPa. Through optimized mix ratios (cement:sand:water:fiber = 1:1:0.35:0.04) and advanced production processes, Qinglong GRC achieves a stable flexural strength above 20MPa and compressive strength of 50MPa, fully meeting the strength requirements of architectural decoration and structural components.

Strength development characteristics: Under standard curing conditions, GRC products reach 60% of the design flexural strength at 3 days, 80% at 7 days, and 100% at 28 days. Steam curing can significantly improve early strength, reaching 70% of the 28-day strength within 1 day. Actual engineering test data shows that Qinglong GRC products have an average 28-day flexural strength of 22.3MPa with a coefficient of variation of only 4.8%, far below the 15% required by national standards.

Flexural Strength Performance

Ordinary GRC has a flexural strength of 15-18MPa, while high-quality products reach 20-25MPa; optimal strength is achieved at a fiber content of 4%-5%; directional fiber distribution can increase strength by 20%-30%; a low water-cement ratio (0.30-0.35) ensures strength development. Flexural strength is the most important mechanical indicator of GRC.

Compressive Strength Characteristics

The matrix compressive strength is 40-60MPa, comparable to concrete; a density of ≥95% ensures full strength development; pressure-formed products show a 15%-20% strength increase; a reasonable sand-cement ratio (1:1) optimizes strength. Compressive strength meets load-bearing requirements.

Tensile Strength Advantages

The tensile strength is 7-10MPa, which is 8-10 times that of ordinary concrete; the fiber bridging effect effectively controls cracking; the ultimate tensile strain of 0.02%-0.03% provides noticeable pseudo-ductility. Tensile performance significantly improves brittleness.

Elastic Modulus Indicators

The elastic modulus is 20-25GPa, providing moderate stiffness; the stress-strain curve shows a linear relationship; deformation capacity is superior to ordinary concrete; it matches well with the modulus of steel reinforcement. Elastic properties are suitable for composite structures.

GRC offers superior strength performance and fully meets building application requirements. Qinglong GRC strictly controls the production process to ensure products meet strength standards.