Key Technical Points and Implementation Strategies for Renovating GRC Components on Existing Buildings

Renovation of GRC Components in Existing Buildings: The Technical Code to Safeguarding Architectural Vitality

Architecture is frozen history, and GRC components are the vivid expression of a building's texture. With the surge in demand for existing building renovation, the refurbishment of GRC components in existing buildings has become a key topic for extending building life and enhancing spatial value. As an industry leader with 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group leverages its full-chain technical strength to provide professional solutions for this sector.

Core Value and Technical Challenges of GRC Component Renovation

During long-term service, GRC components in existing buildings are prone to surface weathering, structural cracking, and anchor loosening, which not only affects architectural aesthetics but also poses hidden safety risks. Compared with new construction projects, renovation works face special challenges such as high requirements for component matching, complex on-site working conditions, and strict schedule constraints. Drawing on the experience of 2,000+ projects, Qinglong Group has concluded that successful GRC renovation must achieve three major goals: restoration of structural safety, holistic restoration of decorative effects, and periodic extension of service life.

Building a Full-Process Renovation Technology System

Qinglong Group has innovatively proposed a five-in-one renovation technology system of "diagnosis-design-manufacturing-installation-maintenance". In the diagnosis stage, 3D laser scanning and non-destructive testing technologies are adopted to accurately obtain the geometric parameters and structural conditions of existing components and establish digital models; in the design phase, parametric technology enables precise matching between new and old components, while incorporating energy-saving upgrade schemes; in the manufacturing stage, backed by a production base with an annual capacity of 600,000 ㎡, mold replication and performance enhancement processes are employed to ensure replacement components are consistent with the original architectural style; in the installation phase, BIM technology and modular construction achieve millimeter-level precision control; and in the after-sales stage, maintenance tracking for up to 15 years is provided, forming a closed-loop full lifecycle service.

Key Implementation Strategies and Quality Control

For different building types, Qinglong Group has formulated differentiated implementation strategies: for historical buildings, authenticity preservation is emphasized, using a process that combines traditional hand replication with modern material reinforcement; for commercial buildings, renovation efficiency is stressed, applying prefabricated assembly technology to shorten construction periods; for public buildings, durability improvement is prioritized, selecting an improved GRC formula with impermeability grade ≥P12. In terms of quality control, the "three-inspection system" is strictly enforced, with focused monitoring of critical processes such as interface treatment, rebar anchoring, and joint sealing. All renovated components pass 150 freeze-thaw cycle tests, ensuring stability in environments ranging from -30℃ to 70℃.

Industry Collaboration and Technological Innovation Outlook

As a participating editor of the Technical Standard for Glass Fibre Reinforced Cement (GRC) Building Applications, Qinglong Group is promoting the establishment of GRC renovation technical specifications and advocating a standardized process of "inspection and assessment-scheme design-professional construction-quality traceability". At the same time, the company is actively exploring UHPC-GRC composite application technology. In the renovation of an old commercial complex in Shenzhen, UHPC-GRC composite components achieved a breakthrough of 40% weight reduction and 200% strength improvement. In the future, with the deep integration of BIM+GIS technology, the renovation of GRC components in existing buildings will enter a new stage of digitalization and intelligence.

The eternal beauty of architecture lies in growing ever more beautiful with time. With 28 years of professional accumulation, Qinglong Group integrates technological innovation into every detail, allowing GRC components to gain new life through renovation and injecting sustainable development momentum into urban renewal. This is not only respect for architectural history but also deep exploration of spatial value, embodying the mission of "creating beautiful architecture".