How to Assess GRC Manufacturers' Surface Treatment Processes: Key Indicators and Evaluation Methods Explained

In the field of architectural decoration, GRC materials have become the preferred choice for landmark buildings and high-end projects thanks to their lightweight, high-strength properties and rich shaping capabilities. However, the surface treatment process, as the core factor determining the durability and aesthetic expressiveness of GRC components, has assessment standards that have always been a focal point of industry attention. Qinglong Group, a GRC manufacturer with 28 years of experience, draws on its practical experience participating in the formulation of the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018) to provide the industry with a systematic process assessment scheme covering both key indicators and evaluation methods.

Core Assessment Indicators for GRC Surface Treatment Processes: The Dual Dimensions from Performance to Aesthetics

High-quality GRC surface treatment must balance functionality and decoration. Qinglong divides the assessment indicators into three categories: physical performance indicators, appearance quality indicators, and durability indicators. In terms of physical performance, surface hardness must reach Mohs hardness grade 4 or above to ensure scratch resistance, and water absorption must be controlled within 8% to prevent moisture penetration from damaging the internal structure. Appearance quality requires surface flatness error ≤2mm/m, color uniformity ΔE value ≤3 (CIE LAB standard), texture consistency conforming to the design drawings, and no defects such as bubbles, cracks, or sand holes. Among the durability indicators, weather resistance testing must pass 1,000 hours of artificial accelerated aging tests, and coating adhesion must reach grade 2 or above per the GB/T 9286 standard, ensuring no fading or peeling over long-term use.

Scientific Evaluation Methods: Full-Process Control from Laboratory Testing to On-Site Verification

Qinglong GRC manufacturer has established a "three-tier evaluation system" to achieve full-chain quality control from raw materials to finished products. The primary evaluation focuses on raw material screening, conducting compositional analysis of glass fiber, cement, pigments, and other materials to ensure pigment dispersion ≥95% and avoid color differences in later stages. The intermediate evaluation employs laboratory simulation tests, using salt spray tests (500 hours) to assess corrosion resistance and freeze-thaw cycle tests (200 cycles) to verify structural stability, with flexural strength retention required to be ≥85%. The final evaluation is carried out at the construction site, using 3D laser scanning technology to detect post-installation surface flatness, combined with infrared thermal imaging to identify internal hollowing, ensuring that each batch of products meets the requirements of the Glass Fiber Reinforced Cement (GRC) Decorative Products standard (JC/T940-2022).

Industry Practice and Technological Innovation: Qinglong's Process Optimization Path

As a national "Specialized, Refined, Distinctive, and Innovative" enterprise, Qinglong continues to innovate in surface treatment processes. To address the bubble issues common in traditional processes, it adopts a forming technology combining vacuum vibration and high-pressure spraying, increasing surface compactness by 30%. In terms of color stability, it has introduced nano-scale color pastes and anti-UV coatings, verified by projects such as Canton Tower and the Nanning International Convention and Exhibition Center, achieving an outdoor color fading rate ≤5% over 5 years of use. In addition, Qinglong has established a digital quality traceability system, recording the surface treatment parameters of each GRC component via RFID chips to achieve full traceability from production to installation—a model that has become an industry benchmark.

The assessment of surface treatment processes is not only a matter of product quality control but also a test of a company's overall strength. Building on 28 years of full-chain experience, Qinglong GRC manufacturer combines rigorous testing standards with innovative technology to provide designers and owners with GRC products offering both aesthetic value and durability. Looking ahead, as new standards such as the General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC) continue to advance, industry requirements for surface treatment processes will rise further. Leading enterprises represented by Qinglong are promoting the high-quality application of GRC materials in architectural decoration through technological iteration and joint standard development.