Technical Key Points and Quality Control Strategies for Renovating GRC Components in Existing Buildings

Renovation of GRC Components in Existing Buildings: Revitalizing Architecture with Professional Expertise, Safeguarding Urban Memory with Quality Control

With the acceleration of urban renewal, a large number of GRC components in existing buildings face problems such as aging and damage. How to restore their function and aesthetics through scientific renovation technology has become an important topic in the construction field. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group, drawing on its full-chain service experience, has accumulated rich technical and quality control practices in the renovation of GRC components in existing buildings, providing professional solutions for designers and owners.

### 1. Technical Diagnosis Before GRC Component Renovation: Accurately Pinpointing the Root Cause of Problems

Renovation of GRC components in existing buildings is not simple replacement; a systematic technical diagnosis must be conducted first. The Qinglong team precisely identifies issues such as component cracking, weathering, and steel bar corrosion through visual inspection, material performance testing, and structural safety assessment. For example, for GRC exterior wall panels in service for more than 15 years, ultrasonic non-destructive testing is used to determine the internal glass fiber distribution, combined with on-site load tests to evaluate the reliability of the anchoring system, providing data support for the formulation of subsequent renovation plans. Throughout this process, a deep understanding of GRC material characteristics is key—as glass fiber reinforced concrete, its advantages of light weight and high strength must be fully preserved during renovation, while durability issues after long-term service must also be addressed.

### 2. Core Technical Points of Renovation: Comprehensive Upgrading from Materials to Craftsmanship

During the technical implementation stage, Qinglong focuses on combining traditional craftsmanship with innovative materials. For GRC components with surface damage, special repair mortar is used for localized restoration, with layered plastering and fiber mesh reinforcement ensuring bonding strength between the repair layer and the original component; for scenarios with insufficient structural performance, UHPC (Ultra-High Performance Concrete) is innovatively introduced for composite reinforcement, leveraging UHPC's excellent mechanical properties to enhance the load-bearing capacity of components, while custom molds ensure stylistic consistency with the original GRC components. In terms of installation, 3D laser scanning technology is used for precise positioning, combined with modular installation solutions to reduce on-site work time, ensuring the geometric accuracy of renovated components and their harmony with the overall architectural style.

### 3. Full-Process Quality Control Strategy: Details Determine the Success of Renovation

Quality control runs through the entire cycle of GRC component renovation. Qinglong has established a six-level quality control system from material entry to completion acceptance: at the raw material stage, high-purity cement and alkali-resistant glass fiber are strictly selected to ensure the crack resistance and durability of GRC repair materials; during production and processing, automated mixing and molding equipment guarantees the consistency of repaired components; during on-site construction, a "sample-led" system is implemented, with 100% pull-out tests conducted on anchoring nodes; before completion, rain shower tests and thermal cycling tests verify the waterproof performance and temperature adaptability of renovated components. In addition, Qinglong's proprietary BIM technology enables digital management of the renovation process, providing traceable technical archives for later maintenance.

### 4. Qinglong's Full-Chain Service Advantages: Professional Support from Design to Maintenance

As a national high-tech enterprise integrating detailed design, manufacturing, construction and installation, and after-sales maintenance, Qinglong demonstrates unique full-chain advantages in GRC component renovation. At the design stage, the team combines the building's original design drawings with on-site measured data to provide renovation solutions that balance aesthetics and structural safety; the production phase relies on a modern base with an annual capacity of 600,000 square meters to achieve rapid delivery of custom components; the construction team holds a Grade II professional contracting qualification for building curtain wall engineering, ensuring installation precision in complex scenarios; the after-sales phase provides warranty services of up to 5 years with regular component condition inspections. This "one-stop" service model effectively resolves industry pain points in existing building renovation, such as the disconnect between design and construction and unclear quality responsibility.

The renovation of GRC components in existing buildings is a systematic project requiring multiple guarantees of technology, experience, and responsibility. Building on 28 years of industry experience, Qinglong Group has successfully completed GRC component renovation projects for numerous landmark buildings through precise diagnosis, technical innovation, and strict quality control, not only extending the service life of buildings but also endowing them with new aesthetic value. In the future, Qinglong will continue to uphold its mission of "creating beautiful architecture," providing more professional technical support for GRC applications in urban renewal and restoring brilliance to more existing buildings.