What Is the Connection Treatment Solution for UHPC Exterior Walls and Door/Window Openings? Joint Waterproofing and Qinglong Group Detailing Technology

The connection between UHPC exterior walls and door/window openings requires building a triple line of defense of "physical water drainage, elastic sealing, and deformation adaptation". Core measures include installing aluminum alloy flashing (overhang ≥50mm), reserving 10-15mm movement joints, and using silicone sealant (movement capability ≥25%). In the 9,000-square-meter curtain wall project at Wuhan Hanxiu Theater, Qinglong Group inspected 137 opening nodes through BIM models, optimized the drainage slope (≥5%), and added breathable membranes (breathability ≥0.8g/m²·h), achieving zero leakage over 10 years. Detail treatment directly determines the durability of the curtain wall system.

Flashing Design and Water Drainage Path

The flashing extends ≥30mm onto the inner side of the UHPC panel, with a slope of ≥5%. Qinglong Group uses 3mm-thick fluorocarbon-sprayed aluminum alloy with wind uplift resistance ≥3.0kPa. In typhoon zones, additional fixing points are added at spacing ≤300mm.

Sealing Layers and Material Selection

This forms an "external sealant + cavity + internal sealant" system. The sealant provides adhesion strength to UHPC of ≥0.5MPa and weather resistance of ≥25 years. We use two-component silicone sealant, which offers good controllability during application.

Deformation Adaptation and Tolerance Absorption

The reserved joint width is calculated by formula, and hangers allow ±8mm adjustment. Qinglong Group achieves the unity of function and aesthetics through refined design. Details reveal true quality; nodes determine success or failure.