Which Technical Parameters to Specify When Signing a GRC Supply Contract: Key Points and Practical Guide

In the field of architectural decoration materials, the precise definition of technical parameters is the cornerstone of project quality assurance. Especially for materials like GRC that combine functionality with artistry, the technical clauses in a supply contract often determine the performance of the final products and the actual engineering results. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group deeply understands the core value of technical parameters in contract signing. This article systematically outlines the key technical points to be clarified when signing a GRC supply contract, providing professional reference for designers and owners.

I. Material Performance Parameters: Building the Basic Line of Defense for GRC Quality

The physical and mechanical properties of GRC materials directly affect building safety and durability. The contract must specify core indicators such as glass fiber content (usually no less than 4.5%), flexural strength (≥12MPa under standard conditions), and elastic modulus (recommended ≥15GPa), while also noting the testing standard references (such as GB/T 15231 or JC/T 940). GRC components produced by Qinglong are certified by national-level testing institutions, with flexural strength reaching over 20MPa, far exceeding the industry average. In addition, long-term performance indicators such as frost resistance (strength loss rate ≤10% after 25 freeze-thaw cycles) and alkali-resistant glass fiber corrosion performance must also be specified in detail in the contract to avoid a surge in later maintenance costs due to insufficient environmental adaptability.

II. Process and Precision Parameters: Ensuring Precise Implementation of Design Creativity

For GRC components with complex shapes, mold-making precision and production process parameters are the key to quality control. The contract should specify mold tolerance (recommended ≤2mm/m), surface treatment grade (such as mirror finish Ra≤3.2μm), and curvature radius limits for special-shaped components (as small as 300mm). Qinglong adopts BIM parametric design and CNC machining technology to achieve millimeter-level precision control for complex shapes such as double-curved surfaces and openwork reliefs. At the same time, curing process parameters need to be specified, such as steam curing temperature (60-80℃) and curing time (≥12 hours), to ensure stable strength growth of the components.

III. Installation and Connection Parameters: The Core Link in Ensuring Structural Safety

The design of installation nodes for GRC components directly affects building structural safety. The contract must specify the anchoring system material (such as 316 stainless steel), load-bearing requirements (tensile load capacity of a single anchor ≥5kN), and fire resistance rating (recommended to meet Class A non-combustible standard). Qinglong's original 3D laser scanning positioning technology can achieve installation errors ≤3mm, and combined with modular installation techniques, greatly improves construction efficiency. In addition, seismic performance parameters (such as allowable displacement under horizontal seismic action) must also be specified in detail according to the seismic fortification intensity of the project location to ensure structural stability under extreme conditions.

IV. Acceptance Standards and Warranty Clauses: Building Full Lifecycle Protection

The contract should specify staged acceptance checkpoints, including incoming inspection of raw materials (such as glass fiber sizing agent content testing), factory pre-assembly acceptance (focusing on joint flatness), and on-site installation acceptance (such as verticality deviation ≤5mm/2m). Warranty period clauses need to distinguish between structural warranties (recommended no less than 50 years) and surface decorative layer warranties (usually 5-10 years), and stipulate a quality traceability mechanism (such as using RFID chips to achieve full lifecycle tracking of components). The ISO9001 quality system established by Qinglong can provide complete testing reports and warranty commitments, guaranteeing the long-term stable operation of the project.

The clear stipulation of technical parameters is the core framework of a GRC supply contract. It not only protects the rights and interests of both supply and demand parties, but also serves as the technical blueprint for realizing design creativity and ensuring engineering quality. Qinglong Group, as an industry benchmark enterprise that participated in drafting the "Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC)", has always provided customers with full-chain services from detailed design to after-sales maintenance with a meticulous, excellence-pursuing attitude. Today, with the vigorous development of new architectural decoration materials, only by choosing a GRC manufacturer with strong technical strength and rich experience can we ensure that every project becomes an architectural artwork that stands the test of time.