What Are the Base Wall Requirements for Installing UHPC Exterior Wall Panels? Qinglong UHPC Substrate Technical Standards

The installation of UHPC exterior wall panels imposes clear requirements on the flatness, strength, and waterproofing of the base wall. Flatness deviation should be ≤3mm/2m, compressive strength ≥7.5MPa, and the waterproofing grade no lower than P6. The base surface should be free of hollowing, cracking, and sand dusting, with moisture content ≤8% and pH value ≤10. These requirements ensure safe and reliable installation.

Specific testing methods: use a 2-meter straightedge to check flatness, a hollowing hammer to check for hollowing, and a rebound hammer to test strength. In one project, the base wall exceeded the flatness tolerance (maximum deviation up to 8mm), causing the UHPC panels to warp after installation, with gaps up to 6mm, making rework unavoidable. In projects meeting the requirements, the wall flatness error after installation is ≤2mm/2m, with even and attractive joints.

Detailed Explanation of Flatness Standards

Wall flatness deviation ≤3mm/2m; verticality deviation ≤H/1000 and ≤10mm; these standards are the foundation of installation.

Analysis of Strength Requirements

Compressive strength ≥7.5MPa; bond strength ≥0.3MPa; these requirements ensure secure installation.

Key Points of Waterproofing Treatment

Waterproofing grade no lower than P6; reinforced treatment at key joints; these points prevent leakage.

Base Treatment Solutions

Leveling is required when flatness exceeds tolerance; reinforcement is needed when strength is insufficient; these solutions address the problems.

Base quality determines installation results. Qinglong UHPC adheres to strict standards to ensure project quality.