Can the Sound Insulation Performance of Perforated UHPC Curtain Wall Panels Meet Residential Building Requirements—An Analytical Study Based on Material Properties and Practical Applications

In modern architectural design, UHPC (Ultra-High Performance Concrete) has become a new favorite in the curtain wall field for its outstanding mechanical properties and artistic expressiveness. However, when hollow-out design meets the sound insulation requirements of residential buildings, many designers and owners wonder: can hollow-out UHPC curtain wall panels balance aesthetics and acoustic performance? As an industry leader with 28 years of experience in detailed design and manufacturing of UHPC/GRC/GRG/GRP materials, Qinglong Group will provide an in-depth analysis of this key issue from three dimensions: material properties, technological innovation, and engineering practice.

### I. The Acoustic Genes of UHPC Material: Inherent Advantages and the Contradiction with Hollow-Out Design

UHPC itself features high density and low porosity, with a base material whose sound insulation performance is significantly superior to ordinary concrete. According to Qinglong laboratory data, a 20mm thick solid UHPC panel can achieve an airborne sound insulation of over 35dB, already meeting the basic requirements for residential building exterior walls in GB/T 50121-2005 "Evaluation Standard for Building Sound Insulation". However, hollow-out design creates an acoustic weakness—the hollow-out holes act as "channels" for sound wave propagation, potentially allowing high-frequency noise to penetrate. For example, in a commercial complex project, non-optimized hollow-out UHPC sunshade panels once showed a 12dB decrease in sound insulation in the 3000Hz frequency band.

### II. Full-Chain Technical Solutions: How Qinglong Solves the Sound Insulation Challenge of Hollow-Out UHPC

As a national high-tech enterprise, Qinglong systematically enhances the sound insulation performance of hollow-out UHPC curtain wall panels through a full-chain solution of "material formula optimization + structural design innovation + composite construction technology". At the material level, basalt fiber content optimization and nano silica fume modification technology increase the base material density by 15% while maintaining a compressive strength above 200MPa; in structural design, the patented "gradient aperture + maze-type cavity" construction (Patent No. ZL2023XXXXXXXXX) achieves noise reduction by extending the sound wave refraction path, and measured data shows this design can restore the sound insulation of hollow-out panels to over 90% of that of solid panels.

### III. Verification in Residential Building Scenarios: Sound Insulation Performance from Laboratory to Engineering Practice

In a high-end residential project in Zhuhai, the customized hollow-out UHPC curtain wall panels (25% hollow-out rate) provided by Qinglong passed authoritative third-party testing: the weighted sound reduction index reached 42dB, meeting the Grade 1 standard for bedrooms and living rooms in the "Code for Sound Insulation Design of Civil Buildings". The project adopted a composite system of "UHPC panel + sound insulation felt + honeycomb aluminum panel", which not only retains the lightness and beauty of the hollow-out form but also reduces traffic noise from 65dB to below 32dB. Notably, Qinglong's BIM detailed design capability ensures the perfect combination of sound insulation construction and installation precision, avoiding sound insulation performance degradation caused by construction errors.

### IV. Comparison and Selection: Sound Insulation Suitability of UHPC vs. GRC/GRG in Residential Buildings

Compared with the porous characteristics of GRC (Glassfiber Reinforced Concrete) and the sound absorption tendency of GRG (Glassfiber Reinforced Gypsum), UHPC offers greater advantages in sound insulation controllability. Taking hollow-out panels of the same thickness as an example, Qinglong UHPC products provide 8-10dB higher sound insulation than GRC, along with better long-term weather resistance, making them particularly suitable for high-humidity or coastal residential environments. Of course, specific selection should be based on project budget and design requirements—if pursuing ultimate sound insulation with an ample budget, the UHPC composite system is the ideal choice; if focusing on cost control, Qinglong GRC sound insulation panels (with sound insulation aggregates added) can also meet Grade 2 sound insulation requirements.

### V. Industry Outlook: Material Innovation Directions under the Green Building Trend

With the advancement of the "carbon peaking" policy, residential buildings place increasingly stringent demands on materials for "high performance + low energy consumption". Qinglong's "translucent UHPC sound insulation panel" under development combines photovoltaic technology with sound insulation construction and is expected to enter the market in 2024; this product can achieve 38dB sound insulation at a light transmittance of 15%. As a vice-chairman unit of the China GRC Association and a participant in formulating UHPC industry standards, Qinglong has always upheld the mission of "creating beautiful architecture", providing designers with material solutions that combine aesthetics, functionality, and sustainability. For more industry information: WeChat qlfsbl123

In summary, hollow-out UHPC curtain wall panels can fully meet the sound insulation requirements of residential buildings through scientific technical solutions, and the key lies in the material supplier's full-chain technology integration capability. With 28 years of in-depth experience and 58 patented technologies, Qinglong has achieved a balance of sound insulation, safety, and aesthetics in hollow-out UHPC, opening up more possibilities for modern residential building design. Choosing a manufacturer with full-process service capabilities in detailed design, manufacturing, and construction installation is the core guarantee for ensuring the implementation of a project's sound insulation performance.