Joint Treatment Solutions and Construction Key Points for UHPC Facade and Door/Window Openings

The refinement of architectural curtain walls is often reflected in detail treatment, and the connection technique between UHPC exterior walls and door/window openings is a key factor determining building quality. As an industry leader with 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group leverages its full-chain technical advantages and has accumulated systematic connection treatment solutions through more than a thousand landmark projects, ensuring both structural safety and a seamless presentation of architectural aesthetics.

### Analysis of Technical Pain Points in UHPC Exterior Wall and Door/Window Opening Connections

UHPC (Ultra-High Performance Concrete), with its ultra-high strength, excellent durability, and design freedom, has become an ideal choice for modern building envelopes. However, door/window openings, as transition zones between walls and the external environment, often face three core challenges: cracking risk caused by differences in thermal expansion and contraction between materials, leakage problems caused by waterproofing seal failure, and visual disconnection at joints between different materials. Taking a commercial complex project as an example, the traditional treatment approach once led to interface deformation under temperature differences because it failed to fully consider the difference in elastic modulus between UHPC and aluminum alloy doors/windows; the problem was ultimately and thoroughly resolved through the joint optimization solution of Qinglong's detailed design team.

### Full-Process Connection Treatment Solution: Precision Control from Design to Construction

Qinglong Group adopts an innovative model of "3D pre-assembly + modular construction" to build a full-cycle solution covering design, production, and installation. In the detailed design stage, BIM technology is used to simulate the stress distribution of door/window openings, and anchoring joints are optimized through parametric modeling, ensuring that the reserved opening deviation of UHPC components is controlled within ±2mm. In the production stage, factory-prefabricated UHPC opening frames are used, integrating water-stop sealant strip grooves and elastic buffer layers to avoid precision loss caused by on-site cutting. During installation, 3D laser scanning positioning technology is employed to achieve "zero-gap" docking between door/window frames and UHPC walls, while completing multiple lines of defense for the waterproof sealing layer.

### Key Construction Control Points and Quality Assurance System

As a national high-tech enterprise, Qinglong has established a strict construction standard system, focusing on four core aspects: first, base treatment, requiring UHPC surface flatness deviation ≤3mm/m, with special interface agents used to enhance bonding; second, elastic connection, with EPDM rubber buffer pads installed between door/window frames and UHPC, allowing ±5mm displacement compensation; third, waterproofing structure, adopting a composite "water drainage + water blocking" design, with eagle-beak drip lines on the exterior and expansive fireproof sealant embedded on the interior; fourth, finished product protection, innovatively using biodegradable protective film covering to avoid cross-construction contamination. These technical points have been successfully applied in benchmark projects such as the Nanjing East Road Century Plaza renovation, achieving excellent performance with no leakage or cracking over 5 years.

### Qinglong Full-Chain Service: Expert Support from Solution to Delivery

Backed by 28 years of industry experience and production capacity across six major production bases, Qinglong provides customers with one-stop services ranging from detailed design and material customization to construction guidance. For UHPC exterior wall systems, the company's R&D center can provide technical support such as material mechanical performance testing and thermal simulation analysis, combined with the "full-process on-site supervision" service of professional installation teams to ensure that connection joint construction meets design requirements. As a participating unit in formulating the industry standard "General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)", Qinglong has always driven industry progress through technological innovation; its self-developed UHPC integrated opening forming technology improves construction efficiency by 40% compared with traditional processes and reduces on-site wet work by 60%.

The warmth of a building lies hidden in the craftsmanship of every detail. With the mission of "creating beautiful architecture", Qinglong Group integrates 28 years of technical accumulation into every connection joint, making UHPC exterior walls not only a protective shell for buildings but also an artistic carrier showcasing design aesthetics. From material R&D to project implementation, Qinglong always solves practical problems from the customer's perspective, interpreting the brand promise of "meticulousness and striving for excellence" with professional strength.