What Is the Bulk Density Range of Lightweight GRC Panels? Analysis of Core Characteristics and Application Scenarios

The density of lightweight GRC panels ranges from 1600-1900kg/m³, far lower than ordinary concrete (2400kg/m³). Lightweighting is achieved primarily by optimizing aggregate gradation and fiber content while maintaining mechanical performance with flexural strength ≥12MPa. With 28 years of formulation optimization experience, Qinglong precisely controls the density of lightweight GRC panels at 1700-1850kg/m³. Projects such as Wuhan Hanxiu Theater and Hainan Poly Peninsula 1 have both met the dual requirements of "lightweight and high strength."

1. Density Classification and Core Application Scenarios

Different densities correspond to differentiated usage needs. Low density (1600-1750kg/m³): suitable for indoor ceilings and lightweight partition walls, with each panel weighing ≤30kg/m², allowing manual handling and installation. Qinglong's GRC ceiling panels matching the Zhuhai Chimelong GRG project have a density of 1700kg/m³, improving installation efficiency by 40%. Medium density (1750-1850kg/m³): balancing lightweight properties with impact resistance, suitable for exterior wall cladding panels and landscape components. Qinglong's exterior GRC panels for Shenzhen Longhua Xiangshan Science and Technology Park have a density of 1800kg/m³ and impact strength ≥3kJ/m². High density (1850-1900kg/m³): suitable for small load-bearing components (such as railings and planters). Qinglong's GRC railings for Zhongshan Kaiyin New Town have a density of 1880kg/m³ and compressive strength ≥30MPa, meeting load-bearing requirements.

2. Key Factors Affecting Density

Three key factors determine the density of lightweight GRC panels. Aggregate gradation: lightweight quartz sand (particle size 0.15-0.3mm) is used in place of ordinary crushed stone, with porosity controlled at 15-20%. Qinglong's aggregate screening precision reaches 99%, ensuring lightweighting while improving compactness. Fiber content: alkali-resistant glass fiber content of 2.2-2.5% forms a three-dimensional reinforcement network and reduces cement usage. Qinglong's fiber distribution uniformity reaches 98%, guaranteeing strength without additional thickness. Production process: high-pressure vibration (pressure ≥0.4MPa) plus vacuum degassing reduces internal pores. Qinglong's vacuum degassing lowers density by 5% while improving impermeability.

3. Qinglong's Lightweighting Technology and Project Practice

Technical optimization achieves a balance between density and performance. Formula improvement: adding 10-15% lightweight ceramsite aggregate reduces density by 10% with strength retention ≥90%. Qinglong's 15mm lightweight GRC carved panels for Wuhan Hanxiu Theater have a density of 1720kg/m³ and flexural strength of 15MPa. Process upgrade: an automated batching system precisely controls the water-cement ratio (0.45-0.5), preventing cement waste from increasing density. Qinglong's batching error is ≤±0.1%. Project case: the double-curved GRC panels (25mm thick) for Hainan Poly Peninsula 1 have a density of 1800kg/m³, with each panel weighing 20% less than ordinary GRC panels, greatly reducing building loads. After installation, there is no deformation or cracking, perfectly meeting the needs of high-end real estate projects.