Analysis of Substrate Wall Requirements and Treatment Points Before UHPC Facade Panel Installation

**Analysis of Requirements for Base Walls Prior to UHPC Exterior Wall Panel Installation and Key Treatment Points**

The aesthetics and safety of architecture begin with rigorous control of every detail. As an industry leader with 28 years of deep expertise in the field of UHPC/GRC/GRG/GRP materials, Qinglong Group knows well that base wall treatment is the "cornerstone" of UHPC exterior wall panel installation quality. Only by ensuring the base wall meets standards can the properties of UHPC materials—light weight, high strength, and excellent durability—be fully realized, achieving a perfect fusion of architectural decoration and structural safety.

**I. Core Requirements for the Base Wall of UHPC Exterior Wall Panels: Comprehensive Consideration from Structure to Precision**

The installation of UHPC exterior wall panels imposes strict standards on base walls, which not only affects installation efficiency but also directly impacts the final engineering quality and service life. As a professional UHPC manufacturer, Qinglong Group always takes the following base wall requirements as prerequisites when undertaking projects nationwide and overseas:

First is **structural safety**. The base wall must possess sufficient load-bearing capacity to withstand the self-weight of UHPC exterior wall panels as well as external forces such as wind loads and seismic loads. For existing building renovation projects, structural testing of the base wall is required to ensure that its compressive strength, shear strength, and other indicators comply with design specifications; for new buildings, strict control of wall masonry or casting quality during the construction phase is needed to avoid structural defects such as hollowing and cracking.

Second is **flatness and verticality**. UHPC exterior wall panels are usually installed using dry-hanging or wet-bonding techniques, and the flatness deviation of the base surface must be controlled within ±3mm/2m, with verticality deviation not exceeding ±5mm/2m. If the base flatness exceeds the standard, it may lead to problems such as uneven gaps and uneven stress after panel installation, affecting the decorative effect and structural stability. During the detailed design phase, Qinglong Group uses BIM technology to accurately verify base dimensions, providing data support for subsequent treatment.

In addition, **surface cleanliness and dryness** are also crucial. The base surface must be free of floating dust, oil stains, release agents, and other contaminants to avoid affecting the effective bonding of adhesives or anchoring systems. Meanwhile, the wall's moisture content must be controlled within the specified range (usually not exceeding 8%) to prevent panel cracking or bonding failure caused by moisture evaporation. For base walls in damp environments, waterproofing treatment is also required, such as applying Qinglong Group's independently developed waterproofing materials to form a reliable moisture barrier.

**II. Key Treatment Points for the Base Wall of UHPC Exterior Wall Panels: Professional Techniques Ensuring Installation Quality**

For different types of base walls (such as concrete walls, masonry walls, steel structure walls, etc.), Qinglong Group has developed a standardized treatment process to ensure the base wall meets the installation conditions for UHPC exterior wall panels:

**1. Base Defect Repair**: Holes, cracks, and other defects on the base surface must be filled and repaired with specialized repair materials. For example, honeycombing and pitted surfaces of concrete walls can be leveled with Qinglong UHPC repair mortar, whose high-strength properties form a good bond with the base; incomplete mortar joints in masonry walls need to be re-pointed to ensure the overall compactness of the wall.

**2. Surface Leveling Treatment**: When the base flatness does not meet requirements, leveling construction is needed. Qinglong Group recommends thin-layer plastering or mechanical grinding, prioritizing leveling materials with high adhesion and low shrinkage, such as Qinglong GRC-specific leveling mortar. For large-area uneven bases, the dot-and-screed technique can be adopted to control the leveling thickness, ensuring surface flatness deviation remains within the allowed range.

**3. Interface Treatment**: To improve the bonding strength between the base and adhesives or anchoring systems, interface treatment of the base is required. Usually, an interface agent can be applied, such as the UHPC-specific interface agent developed by Qinglong Group, which can effectively penetrate into the pores of the base, forming an "anchor bolt effect" that enhances interface bonding. For smooth concrete surfaces, roughening treatment can also be performed to increase surface roughness.

**4. Positioning of Embedded Parts and Connectors**: Embedded parts or connectors, such as expansion bolts and angle steel brackets, must be accurately installed on the base wall according to design drawings. Qinglong Group uses 3D laser scanning technology for positioning during construction, ensuring that the position, quantity, and spacing of embedded parts meet design requirements with deviations controlled within ±2mm, providing assurance for the precise installation of UHPC exterior wall panels.

**III. Qinglong Group's Full-Chain Service: A Quality Commitment from Detailed Design to After-Sales Maintenance**

As a national high-tech enterprise integrating the full chain of detailed design, manufacturing, construction and installation, and after-sales maintenance, Qinglong Group always incorporates base wall treatment as a critical link into its quality management system for UHPC exterior wall panel projects. The company's technical team conducts in-depth on-site surveys in the early project stage, formulates customized base treatment plans based on 28 years of engineering experience, and provides professional technical guidance; the production process strictly controls the quality of UHPC panels to ensure stable product performance; the construction and installation phase adopts advanced techniques and equipment to ensure precise alignment between base treatment and panel installation.

From domestic landmark buildings to key overseas projects, Qinglong Group provides customers with high-quality UHPC/GRC/GRG/GRP products and services with a meticulous and excellence-driven attitude. In the future, Qinglong Group will continue to focus on the innovation and application of new architectural decoration materials, striving to become an outstanding world-leading UHPC/GRC/GRG/GRP manufacturer and contributing to the creation of aesthetically beautiful architecture.