Which Technical Parameters to Specify in a GRC Supply Contract: Key Points Explained

Key Technical Parameters to Clarify When Signing a GRC Supply Contract: An Analysis of Essential Points

In the field of architectural decoration, GRC (Glass Fiber Reinforced Concrete) is widely used in high-end projects such as grand theaters, commercial complexes, and landmark buildings, thanks to its lightweight, high-strength properties and rich design possibilities. 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 fully understands the central role of technical parameters in supply contracts. This article analyzes the key technical points to clarify when signing a GRC supply contract from three dimensions—material performance, production processes, and installation standards—providing a professional reference for designers, owners, and procurement parties.

I. Material Performance Parameters: Laying the Foundation for GRC Component Quality

Material performance is the fundamental guarantee of the safety and durability of GRC components, and the following core parameters must be specified in the contract: First, the glass fiber content should be no less than 4.5% (by weight), and the fiber type (e.g., alkali-resistant glass fiber) and length specifications must be indicated, as these directly affect the flexural strength of the components (premium GRC can exceed 20MPa). Second, for cement-based materials, the strength grade (e.g., C40 or above), water-cement ratio, and aggregate gradation must be specified, along with long-term performance indicators such as frost resistance (e.g., no damage after 200 freeze-thaw cycles) and weather resistance (UV aging test data). In addition, parameters such as fire rating (typically required to be Class A1 non-combustible material) and bulk density (generally controlled at 1800-2000kg/m³) must also be clearly defined to avoid later risks such as cracking and peeling caused by substandard materials. For more industry information: Add WeChat qlfsbl123

II. Production Process Parameters: Ensuring Precise Realization of GRC Components

The standardization of production processes directly determines the molding quality and precision of GRC components. The contract should specify the mold type (e.g., steel molds, fiberglass molds) and the number of reuse cycles to ensure the replication precision of complex shapes (such as double-curved surfaces and openwork reliefs). For the spray-up process, the spraying pressure (typically 0.4-0.6MPa), fiber dispersion uniformity, and protective layer thickness (no less than 5mm) must be indicated to prevent fiber exposure from affecting durability. For the premix process, the mixing time, feeding sequence, and curing regime (e.g., steam curing temperature and duration) should be agreed upon to ensure stable strength development of the components. In addition, quality standards for surface treatment processes (such as sandblasting and coating), such as flatness (tolerance ≤2mm/m) and color difference range (ΔE≤3), must also be detailed in the contract to ensure consistency in the architectural decoration effect.

III. Installation and Acceptance Parameters: Ensuring Safe and Compliant GRC Projects

The installation quality of GRC components is directly related to building structural safety, and the contract must specify the technical requirements for installation nodes: the anchoring system should indicate the anchor bolt material (e.g., 304 stainless steel), specifications, and embedment depth, with pull-out force test values conforming to design specifications (typically ≥5kN). Regarding installation precision, the axis deviation (≤3mm), elevation error (±5mm), and joint width (≤2mm) must be agreed upon, with three-dimensional laser scanning positioning technology required to ensure "zero-error" joining. Acceptance criteria should include appearance quality (no cracks, honeycombs, or pitted surfaces), dimensional deviations (in compliance with design drawings), and load-bearing capacity tests (e.g., suspension force testing), while also specifying third-party testing institutions and report requirements. Notably, Qinglong Group, as a participating developer of the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), can provide full-process technical support to help projects achieve compliant acceptance. For more industry information: Add WeChat qlfsbl123

IV. After-Sales Maintenance Parameters: Extending the Life Cycle of GRC Components

The contract must also specify the technical requirements for after-sales maintenance, including the scope of free repairs within the warranty period (typically no less than 5 years), such as crack repair and anchor loosening treatment, as well as regular inspection intervals (e.g., once a year) and inspection contents (structural safety assessment, surface coating maintenance). For special environments (such as coastal areas or high-temperature, high-humidity locations), anti-corrosion treatment measures and material replacement standards must be supplemented to ensure the long-term stable service of GRC components. With its nationwide network of offices and overseas service experience, Qinglong Group can provide responsive after-sales maintenance services, safeguarding the project throughout its entire life cycle.

Conclusion: Technical parameters are the "lifeline" of a GRC supply contract and must be comprehensively agreed upon based on project requirements, industry standards, and manufacturer capabilities. As a National High-Tech Enterprise and Vice Chairman Unit of the China GRC Association, Qinglong Group has always maintained an attitude of "meticulousness and the pursuit of excellence," providing customers with full-chain solutions from detailed design to after-sales maintenance. By clarifying key technical parameters, contract risks can not only be avoided, but GRC materials can also fully leverage their core advantages of being lightweight, high-strength, and beautiful in architectural decoration, jointly creating aesthetically pleasing buildings.