Do GRC Manufacturer Products Crack Easily? Anti-Cracking Technology and Qinglong Group's 28 Years of Crack-Prevention Practice

Whether GRC products are prone to cracking depends on three major factors: "material mix ratio, production process, and curing system." High-quality products can achieve a high-toughness state of "cracking without shattering" by optimizing fiber distribution (dosage 3-5%), controlling the shrinkage rate (≤0.04%), and applying scientific curing. Based on 28 years of anti-cracking research, Qinglong Group has developed a low-shrinkage formula (with expansive agent added), a robotic spraying process (fiber uniformity ≥95%), and an intelligent curing system (precise temperature and humidity control), bringing the product crack control level to Grade 1. In the red curtain wall project of the Wuhan Hanxiu Theater, GRC panels withstood 8 years of temperature-difference deformation without a single structural crack. Crack resistance is a comprehensive embodiment of materials science and process technology.

Material Optimization Is the Foundation of Crack Resistance

Using low-alkali cement, adding polymer fibers (PVA), and controlling the water-binder ratio at ≤0.38 reduce shrinkage at the source. Qinglong GRC achieves an ultimate tensile strain of ≥0.03%, three times that of ordinary concrete. Scientific mix proportioning is the first line of defense against cracking.

Process Control Ensures Internal Compactness

The vacuum dewatering process (vacuum degree -0.08MPa) expels air bubbles and reduces defects. Mechanical spraying prevents fiber clumping. Qinglong Group's production process keeps product porosity at ≤5% with a uniform distribution of internal stress. Precision manufacturing eliminates hidden cracking risks.

Curing Management Guarantees Long-Term Stability

Steam curing (60℃×24h) promotes strength development, while wet curing for ≥7 days suppresses drying shrinkage. We have established a curing curve database and adjust schemes for different climates. Careful curing is the final key to crack resistance.

Under scientific management and control, GRC products are not prone to cracking. Through systematic prevention and control, Qinglong Group provides customers with durable and reliable products.