Can the Sound Insulation Performance of Perforated UHPC Curtain Wall Panels Meet Residential Building Requirements?

The sound insulation performance of hollow-out UHPC curtain wall panels can meet residential building requirements (weighted sound reduction index ≥40dB) through optimized design, with three core approaches: controlling the hollow-out rate, optimizing the hollow-out structure, and adding sound insulation layers. With Qinglong's customized sound insulation solutions, UHPC panels with a hollow-out rate of 30%-50% can achieve a sound reduction index of 40-45dB, fully meeting residential building sound insulation standards.

I. Impact of Hollow-Out Characteristics on Sound Insulation Performance

Hollow-out design affects sound insulation, so parameters must be scientifically controlled. Hollow-out rate control: when the hollow-out rate is ≤30%, the sound reduction index is ≥45dB (close to solid panels); at 30%-50%, it is 40-45dB; when >50%, it drops to 35-40dB. Qinglong keeps the hollow-out rate within 50% for residential building projects. Hollow-out structure: round and square holes provide better sound insulation than slotted holes, and densely arranged small holes outperform sparsely arranged large holes. Qinglong gives priority to round hole designs (diameter ≤50mm), which improve sound insulation by 10%-15%. Panel thickness impact: at a panel thickness of 30-50mm, the sound reduction index is 5-8dB higher than that of 20-30mm panels; Qinglong residential hollow-out panels are ≥35mm thick.

II. Sound Insulation Optimization Design: Three Core Improvement Approaches

Sound insulation performance is enhanced through structural optimization and material combinations. Adding sound insulation layers: bonding 10-15mm sound insulation cotton (rock wool or polyester fiber cotton) to the inner side of hollow-out panels increases the sound reduction index by 8-10dB; with Qinglong's composite sound insulation cotton, the sound reduction index can reach 45-50dB. Double-layer structure design: adopting an "outer hollow-out UHPC panel + inner solid UHPC panel" structure with a reserved 50-100mm air cavity in between achieves a sound reduction index ≥48dB; Qinglong's double-layer structure is suitable for high-end residences with demanding sound insulation requirements. Sealing treatment: the edges of hollow-out holes and panel joints are sealed with sealant to prevent sound transmission through gaps; after Qinglong's sealing treatment, gap sound transmission is attenuated by ≥15dB, with no risk of sound leakage.

III. Qinglong's Sound Insulation Solution Verification and Project Practice

Testing and project practice prove the effectiveness of the solutions. Testing certification: Qinglong's hollow-out UHPC panels passed third-party testing—when the hollow-out rate is 40%, the weighted sound reduction index is 42dB, reaching 47dB after adding the composite sound insulation layer, meeting the GB/T 50121-2005 residential building sound insulation standard. Project cases: a high-end residence in Nanning with a UHPC hollow-out curtain wall adopted a "35mm hollow-out panel + 12mm sound insulation cotton" solution with a sound reduction index of 45dB, and the owner reported indoor noise ≤40dB at night; a seaview residence in Sanya adopted a double-layer UHPC hollow-out structure to resist sea wind noise, achieving a sound reduction index of 48dB, with sound insulation superior to traditional stone curtain walls.