Existing Building Renovation: Guide to the Standard Construction Process for UHPC Panel Application

Using UHPC panels for exterior wall renovation of existing buildings not only enhances the building's appearance quality but also improves exterior wall performance, making it a popular choice in recent years. However, existing building renovations involve complex site conditions, and the construction process must be strictly standardized. Qinglong Group, with 28 years of UHPC/GRC/GRG/GRP construction experience, has developed a comprehensive construction process for UHPC panels in existing building exterior wall renovations to ensure project quality and safety.

#Preliminary Assessment and Design Development: Laying the Foundation for ConstructionPreliminary assessment is a key prerequisite for existing building renovation. Qinglong Group's technical team first conducts a comprehensive inspection of the existing building's main structure and base walls, evaluating indicators such as load-bearing capacity, flatness, and stability to determine whether they meet UHPC panel installation requirements. Based on the issues identified during inspection, a base treatment plan is formulated, covering reinforcement, leveling, and waterproofing repair. Subsequently, in line with the building's original style and renovation needs, detailed design development is carried out to determine the dimensions, shapes, installation methods, and connection joints of the UHPC panels, with BIM technology used to simulate the construction process and preemptively avoid installation conflicts. In the auditorium renovation project of the American International School of Guangzhou, Qinglong's precise preliminary assessment and design development provided a scientific basis for subsequent construction and ensured the smooth progress of the project.

#Old Wall Treatment and Base Preparation: Ensuring Installation QualityOld wall treatment and base preparation directly affect the installation quality and service life of UHPC panels. Qinglong Group's construction team first removes the original exterior wall decorative layers and damaged components, and clears dust, oil stains, hollowing, and other defects from the wall surface. For areas where the base wall lacks sufficient strength, carbon fiber cloth and angle steel are used for reinforcement; for uneven wall surfaces, cement mortar or specialized leveling materials are applied, ensuring the wall's flatness error is controlled within ±3mm/2m. Meanwhile, exterior wall waterproofing is redone, with waterproof membranes and waterproof coatings installed to prevent later leakage. In an old residential community renovation project, Qinglong's standardized old wall treatment provided a solid, level base foundation for UHPC panel installation.

#UHPC Panel Prefabrication and Transportation: Ensuring Product QualityUHPC panels are prefabricated in factories, which effectively guarantees product quality and construction efficiency. Based on the detailed design drawings, Qinglong Group prefabricates UHPC panels at standardized production bases, using automated batching, precision mold forming, and steam curing processes to ensure panel dimensional errors do not exceed ±2mm and strength meets standards. After production, panels undergo strict inspection, and substandard products are firmly prevented from leaving the factory. For transportation, customized packaging and professional logistics vehicles are used to prevent panels from being bumped and damaged in transit; upon arrival at the site, panels are properly stored with moisture-proof and sun-protection measures. In the Yangshengtang Pharmaceutical Hangzhou Industrial Park renovation project, Qinglong's prefabricated UHPC panels were delivered on time and on demand, providing strong support for on-site construction.

#On-site Installation and Sealing Treatment: Achieving Seamless IntegrationOn-site installation and sealing treatment are the core stages of construction. Qinglong Group's construction team uses the dry-hanging installation method, fixing UHPC panels to the base walls through embedded parts and hangers. During installation, 3D laser scanning positioning technology is used to ensure installation accuracy, with panel verticality and flatness errors controlled within ±2mm. After installation, panel joints undergo sealing treatment, filled with highly weather-resistant silicone sealant to ensure tight adhesion between the sealant and panels, free of bubbles and voids. Meanwhile, the connections between UHPC panels and door/window openings, eaves, corners, and other areas are properly handled to ensure waterproofing and thermal insulation performance. In an existing building renovation project in Shanghai, Qinglong achieved seamless integration between the UHPC exterior walls and the original building through precise installation and sealing treatment, with remarkable renovation results.

#Acceptance Inspection and Maintenance Guidance: Ensuring Long-term UseAcceptance inspection and maintenance guidance are important stages in project completion. Qinglong Group conducts a comprehensive acceptance inspection of the UHPC exterior walls in accordance with relevant standards and design requirements, covering indicators such as appearance quality, installation accuracy, and waterproofing performance; delivery only takes place after passing inspection. At the same time, detailed maintenance guidance is provided to owners, including daily cleaning methods, key points for regular inspection, and maintenance cycles, helping owners properly maintain their UHPC exterior walls and extend their service life. In an existing building renovation project in Nanning, Qinglong's professional acceptance inspection and maintenance guidance provided owners with long-term use assurance.

The construction process for switching to UHPC panels in existing building exterior wall renovations must strictly follow the full-process standards of preliminary assessment, old wall treatment, prefabrication, on-site installation, and acceptance/maintenance. With 28 years of construction experience and a professional technical team, Qinglong Group provides customized solutions and full-process services for every renovation project, ensuring project quality and safety. Choose Qinglong, your UHPC manufacturer, to make existing building renovation more efficient, more reliable, and more aesthetically pleasing.