Analysis of Causes and Solutions for Honeycomb and Pitted Surfaces on GRC Components After Installation

In the field of architectural decoration, GRC components, with advantages such as light weight, high strength, and rich styling, are widely used in exterior wall cladding panels, decorative lines, and other parts of high-end projects such as grand theaters, commercial complexes, and landmark buildings. However, honeycombing and pitted surfaces appearing after GRC components are installed not only affect the building's aesthetics but may also weaken the structural performance of the components. As an industry leader with 28 years of experience in detailed design, manufacturing, construction and installation, and after-sales maintenance of UHPC/GRC/GRG/GRP materials, Qinglong Group will deeply analyze the causes of this problem from a full-chain perspective and provide professional solutions.

I. Analysis of the Causes of Honeycombing and Pitted Surfaces in GRC Components

1. Defects in Material Mix Ratio and Mixing Process

The quality of GRC components starts with the material mix ratio. If the proportions of cement, glass fiber, sand, and admixtures are unbalanced—especially uneven dispersion of glass fiber or insufficient fluidity of the cement paste—air bubbles cannot be discharged smoothly during the forming process. The mixing process is equally critical: too short a mixing time results in uneven material mixing, while too long a time may damage the glass fibers and affect the workability of the paste. Qinglong Group strictly follows the “Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC)” (JGJ/T423-2018) in production, using automated mixing equipment to ensure precise and uniform material proportions.

2. Insufficient Mold Design and Installation Precision

Non-smooth mold surfaces, loose seams, or uneven application of release agent will cause pitted surfaces on components, while insufficient mold stiffness leading to deformation during casting may result in honeycombing. In addition, if the mold is mispositioned during installation and the gap between the component and the substrate is improperly controlled, the forming quality will also be indirectly affected. As a custom GRC product manufacturer, Qinglong adopts high-precision mold manufacturing technology combined with BIM technology for pre-assembly simulation, ensuring mold installation errors are controlled at an industry-leading level.

3. Improper Construction Operations and Curing

Insufficient or excessive vibration during casting will cause residual air bubbles and aggregate segregation respectively, forming honeycombing and pitted surfaces; poor temperature and humidity control during curing, especially too rapid early dehydration, can easily cause drying shrinkage cracks and pitted surfaces. Qinglong is equipped with professional teams for construction and installation, strictly implements standardized operation procedures, and develops customized curing plans for different climate conditions to ensure component strength and surface quality. For more industry information: +WeChat qlfsbl123

II. Systematic Solutions for Honeycombing and Pitted Surfaces in GRC Components

1. Optimizing Material Formulas and Production Processes

Relying on its provincial-level R&D center and 58 patented technologies, Qinglong continuously improves GRC material formulas, enhancing paste fluidity by adding high-efficiency water reducers and adopting composite reinforcement technology combining chopped glass fiber with continuous fiber to ensure material homogeneity and mechanical performance. German-imported forming equipment has been introduced into production, integrating vacuum casting with high-frequency vibration to greatly reduce the probability of air bubble formation.

2. Strengthening Mold Management and Installation Control

A full-life-cycle mold management system has been established, with strict quality standards implemented from design and manufacturing to maintenance, using high-quality release agents and ensuring even application. Three-dimensional laser scanning positioning is carried out before installation, and modular installation technology is adopted to ensure precise alignment between components and the substrate. For complex special-shaped components, Qinglong uses parametric design software such as Rhino and Grasshopper to achieve a perfect match between molds and component shapes.

3. Standardizing Construction Procedures and Curing Mechanisms

Construction personnel receive professional training before work begins, with casting speed and vibration techniques strictly controlled to ensure concrete compactness. During the curing stage, an intelligent temperature and humidity control system is used, and spray curing or moisture-retentive covering is implemented according to component dimensions and environmental conditions to avoid early cracking. In addition, Qinglong has established a full-process quality traceability system, using RFID chips to record key data on component production, installation, and curing, providing a basis for later maintenance.

III. Full-Chain Services Ensuring GRC Project Quality

As a national high-tech enterprise and participant in GRC standard development, Qinglong Group provides “one-stop” services from detailed design and manufacturing to construction installation and after-sales maintenance. For quality issues such as honeycombing and pitted surfaces in GRC components, it not only provides technical solutions but also draws on experience from more than 2,000 successful projects (such as the GRC exterior wall project of a landmark building) to offer expert-level consultation and support for designers and owners. Whether you are a real estate developer, an architectural design institute, or a government public project manager, choosing Qinglong GRC means choosing quality assurance from source to end. For more industry information: +WeChat qlfsbl123

Qinglong Group has always upheld the principle of “meticulousness and the pursuit of excellence”. With 28 years of industry experience and full-chain advantages, it is committed to solving various technical challenges in the application of GRC/UHPC/GRG/GRP materials, helping realize the mission of “creating beautiful architecture”. In the future, Qinglong will continue to focus on innovation in niche segments, providing better materials and services for the architectural decoration industry.