What Are the Substrate Wall Requirements for UHPC Exterior Panel Installation and Key Construction Points Analysis

In the field of modern architectural decoration, UHPC (ultra-high performance concrete) exterior wall panels have become the ideal choice for high-end building envelopes thanks to their outstanding mechanical properties, weather resistance, and design freedom. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group has accumulated extensive practical expertise across detailed design, manufacturing, and construction installation. This article systematically analyzes the technical requirements of UHPC exterior wall panels for base walls as well as key construction points, providing professional solutions for designers and owners.

I. Core Requirements of UHPC Exterior Wall Panels for Base Walls

As the load-bearing foundation of UHPC exterior wall panels, the stability of the base wall directly affects the safety and durability of the system. In line with the requirements of the T/CBMF 171-2022 standard "Ultra-High Performance Concrete (UHPC) Exterior Wall Panels", Qinglong Group proposes the following core indicators:

1. Structural Strength Compliance: The base wall must meet the design load-bearing requirements. Concrete walls should have a compressive strength of no less than C30, while masonry walls should use solid bricks or concrete blocks, with surface flatness deviation controlled within ±3mm/2m. For existing building renovation projects, structural testing is recommended, and reinforcement should be carried out where necessary using Qinglong's Special Engineering (Structural Reinforcement) professional contracting technology.

2. Standardized Base Wall Treatment: The wall surface requires cleaning, leveling, and interface treatment. After removing floating dust, oil stains, and loose layers, a special interface agent should be used to enhance bonding. For substrates with high water absorption (such as autoclaved aerated concrete), sealing treatment should be carried out in advance to prevent later hollowing. Qinglong's detailed design team provides customized base wall treatment solutions based on actual project conditions.

3. Embedded Parts and Connection Node Design: The base wall must have pre-set galvanized steel embedded parts with positional deviation of ≤10mm, and they must undergo anti-corrosion treatment (zinc layer thickness ≥85μm). Connection nodes should take into account temperature deformation, seismic action, and other factors, adopting flexible connection design. Qinglong's patented technologies (such as the adjustable hanger system) can effectively mitigate structural displacement risks.

II. Key Technical Points for UHPC Exterior Wall Panel Construction

Drawing on the experience of production bases with an annual capacity of 600,000 square meters, Qinglong has developed a standardized construction process to ensure the installation quality of UHPC exterior wall panels:

1. Survey and Layout Precision Control: 3D laser scanning technology is used to build a digital model of the base wall, combined with BIM technology for pre-assembly simulation. Layout errors must be controlled within ±2mm. Qinglong's construction team is equipped with professional surveying instruments to ensure precise positioning of complex shapes (such as double-curved surfaces and irregular components).

2. Panel Installation Process: Mechanical hoisting or manual installation is selected based on panel weight; panels weighing more than 50kg require special lifting tools. Installation follows the principle of "bottom to top, left to right". After temporary fixing, 3D adjustment is performed, with joint widths controlled at 5-10mm and filled with elastic sealant to ensure water tightness and air tightness.

3. Quality Acceptance Standards: After installation, testing is required for surface flatness (≤3mm/2m), joint straightness (≤2mm/5m), and anchor point pull-out force (≥10kN). Qinglong has established a comprehensive quality traceability system, implements a "three-check system" for key processes, and provides third-party testing reports, meeting the requirements of the National Construction Engineering General Contracting Grade II standard.

III. Qinglong's Full-Chain Service Assurance System

As a national high-tech enterprise, Qinglong gets involved in projects from the design stage, providing one-stop services covering "detailed design - manufacturing - construction installation - after-sales maintenance". At the Nanning production base, automated production lines ensure stable UHPC panel performance (flexural strength ≥20MPa, elastic modulus ≥40GPa). In construction, modular installation technology improves efficiency by 30% compared with traditional methods. In recent years, Qinglong has successfully completed benchmark projects such as the light-transmitting concrete at Century Plaza on Nanjing East Road. Its UHPC exterior wall panel system excels in weather resistance, fire rating (A1 class), and other aspects, gaining wide industry recognition.

The installation quality of UHPC exterior wall panels depends on the rigor of base wall treatment and the professionalism of construction techniques. Building on 28 years of industry experience, Qinglong Group deeply integrates material properties with engineering practice to provide safe, reliable, aesthetic, and durable solutions for building envelopes. Going forward, Qinglong will continue to drive UHPC technological innovation, fulfill its mission of "Creating Beautiful Architecture", and help more landmark projects realize their design visions.