Which Technical Parameters Should Be Specified in a GRC Supply Contract to Ensure Project Quality and Delivery Standards

In the field of architectural decoration, GRC material has become the ideal choice for high-end projects such as grand theaters and commercial complexes, thanks to its lightweight, high-strength, and flexible molding properties. However, the stability of material performance directly affects project quality and delivery standards. Clearly specifying technical parameters when signing a GRC supply contract is a critical step to avoid later rework and ensure project implementation. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP, Qinglong Group will analyze the technical points that cannot be overlooked in contracts for designers and owners, starting from the essence of the material.

Core Performance Parameters of GRC Material: Controlling the Quality Baseline at the Source

The contract should first specify the basic performance indicators of GRC products, which are the "lifeline" of material quality. According to the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), the flexural strength should be no less than 12MPa to ensure that components have sufficient load-bearing capacity during installation and use; the bulk density should be controlled at 1.8-2.0g/cm³, balancing structural safety with lightweight advantages. In addition, parameters such as frost resistance (no cracks after 25 freeze-thaw cycles) and alkali-resistant glass fiber content (≥4%) must be clearly marked to avoid durability problems caused by cutting corners on raw materials. As an enterprise that participated in drafting this standard, Qinglong recommends adding a clause in the contract for sampling and testing by a third-party testing agency to ensure that every batch of products meets performance standards.

Customized Production Parameters: Connecting Design Creativity with Project Implementation

GRC's core competitiveness lies in its ability to realize complex shapes, so the contract needs to detail the technical parameters related to customization. For shaped components such as double-curved surfaces and openwork reliefs, the minimum radius of curvature (recommended ≤300mm), surface flatness (error ≤2mm/m), and texture replication accuracy (such as fidelity requirements for imitation stone textures) should be clearly specified. Taking the Century Plaza renovation project on Nanjing East Road as an example, Qinglong used parametric design and BIM technology to control the light transmittance error of translucent concrete within ±5%, ensuring the precise presentation of the design effect. In addition, installation-related parameters such as the material of embedded parts (e.g., 304 stainless steel) and anchor point spacing (recommended ≤600mm) also need to be detailed in the contract to avoid safety hazards caused by unstable installation.

Full-Cycle Quality Assurance: Closed-Loop Management from Production to Maintenance

The delivery of high-quality GRC projects depends on full-process quality control. The contract should specify the quality traceability mechanism in the production process, such as using RFID chips to record component information, achieving full traceability from raw materials to installation. For the construction phase, the environmental requirements for on-site installation (e.g., temperature 5-35℃ and humidity ≤85%) and acceptance criteria (e.g., joint height difference ≤1mm) need to be agreed upon. Regarding after-sales maintenance, it is recommended to specify the repair response time within the warranty period (usually 5 years, e.g., on-site within 24 hours) and the frequency of regular inspections. As a national high-tech enterprise, Qinglong has established a full-chain service system of "detailed design - manufacturing - construction and installation - after-sales maintenance" and has provided stable quality assurance for more than a thousand projects in China.

When signing a GRC supply contract, clearly defining technical parameters is not only a constraint on material performance but also a commitment to project quality. From basic performance to customization details, from production control to after-sales guarantee, behind every parameter lies the practice of the mission of "creating beautiful architecture". Qinglong Group is willing to leverage its 28 years of technical accumulation and experience in developing industry standards to provide professional GRC solutions for designers and owners, making every project a premium project that stands the test of time.