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

In the field of architectural decoration, GRC components, with their lightweight, high-strength and richly varied shapes, are widely used in high-end projects such as grand theaters, commercial complexes, and landmark buildings. However, honeycomb and pitted surface problems appearing after installation not only affect aesthetics but may also bury structural hazards. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group draws on the practice of more than a thousand projects to deeply analyze the causes of this common quality problem and its systematic solutions.

The formation of honeycomb and pitted surfaces in GRC components can be traced back to the entire production and construction process. In the material preparation stage, uneven mixing of glass fibers with the cement matrix, or an excessively high sand ratio causing imbalanced aggregate gradation, will directly affect the fluidity and compactness of the concrete. Qinglong's production base adopts a fully automatic proportioning system, and through a three-stage mixing process ensures fiber dispersion uniformity of over 98%, reducing bubble formation at the source. During the construction stage, insufficient vibration or inadequate formwork sealing are the main causes. In one commercial complex project, missed spots in manual vibration caused pitted surfaces on 3% of the components; later, by introducing high-frequency vibration equipment and BIM pre-assembly technology, the defect rate was brought below 0.5%.

Preventive measures require building a "materials-process-management" trinity quality control system. In terms of materials, strictly follow the Technical Standard for Building Applications of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), and select alkali-resistant glass fibers with alkali content ≤0.6% and Portland cement of grade 42.5 or above. Qinglong's R&D center optimizes the mix ratio through orthogonal tests, keeping the 28-day flexural strength of components stable above 22MPa, while adding a special air-entraining agent to improve workability. In the production process, vacuum degassing technology can increase component compactness by 15%, while selecting imported release agents and sealing strips for formwork can effectively prevent slurry leakage.

Refined management of the installation stage is equally critical. It is recommended to adopt 3D laser scanning positioning technology to ensure component installation errors are ≤2mm, and to carry out pull-out force testing on the anchoring system (standard value ≥10kN). Qinglong's construction team innovatively adopted a "wet bonding + dry hanging" composite process, successfully solving the installation compactness problem of large curved-surface components in a landmark project in Guangzhou. For honeycomb and pitted surfaces that have already appeared, Qinglong's special repair mortar can be used for treatment; its bond strength with the substrate reaches 3.5MPa, and it has passed a 1000-hour weather resistance test, ensuring long-term stable repair results.

As a national high-tech enterprise and a participant in formulating GRC industry standards, Qinglong Group has always taken "creating beautiful architecture" as its mission, transforming 28 years of technical accumulation into full-chain solution capabilities. From parametric modeling in the detailed design stage, to the 6S management system in production, and to digital control in construction and installation, a quality assurance closed loop covering UHPC/GRC/GRG/GRP materials has been formed. For more industry information: add WeChat qlfsbl123

As the architectural decoration industry's requirements for material performance and aesthetic effects continue to rise, the quality control of GRC components has become a key element of project success. By establishing standardized production processes, introducing intelligent construction technology, and implementing full life-cycle management, common quality problems such as honeycomb and pitted surfaces can be systematically solved. Qinglong Group will continue to leverage its professional advantages to provide designers and owners with one-stop services from concept to completion, helping create more architectural masterpieces that combine safety and artistry.