luofu white

Aluminum Foam Noise Barrier

Product Introduction

Aluminum Foam Noise Barrier is manufactured entirely from pure aluminum or aluminum alloy via advanced foaming metal technology. Combining metallic toughness with structural cellular damping benefits, it achieves exceptional porosity and energy absorption. Possessing a total weight of just 1/5 to 1/3 of conventional steel or aluminum panels, it delivers robust broadband sound attenuation and heavy‑duty physical shielding without requiring internal glass wool fills.

Besides our Aluminum Foam Noise Barrier, we supply a full portfolio of acoustic barrier solutions, including Metal Louver Noise Barrier, Metal Micro‑Perforated Noise Barrier, PMMA Acrylic Noise Barrier and Photovoltaic Noise Barrier. We also provide Acoustic Core Systems and supporting accessories for varied project demands.

For full‑scale highway infrastructure projects, our noise barrier systems can integrate with Highway Guardrail Systems and other Traffic Safety and Road Management Products, delivering unified solutions for noise reduction and road traffic management.

Curved Aluminum Foam Noise Barrier for urban viaduct, arched composite noise barrier along city elevated expressway

Product Series & Primary Applications

AluFoam-Transit (High-Speed Rail & Highway Trunk Lines)

Composition: Ultra-high porosity (80% ~ 85%) structural aluminum foam panels optimized for extreme transit speed acoustic management and severe environmental stability.

Applications:

  • High-speed railway lines
  • Arterial expressways
  • Open coastal bridges
  • Heavy chemical zones

Metrics:

  • Wind load resistance ±3.8 ~ ±5.2 kPa
  • High-frequency absorption index ≥ 0.9

AluFoam-Urban (Municipal & Light Rail Logistics)

Composition: Ultra-lightweight thin cellular matrix. Density is tightly maintained at only 0.1 to 0.4 times that of standard sheet metal, streamlining manual field handovers.

Applications:

  • Urban metro/light rail overpasses
  • Elevated viaducts
  • Municipal arterial channels

Metrics:

  • Super-light mass density 8.0 ~ 18.0 kg/m²
  • Supporting rapid crane-free manual deployment

Core Technical & Performance Specifications

Acoustic Damping Performance

Noise Reduction Coefficient (NRC): 0.65 ~ 0.95 (Typical Performance ≥ 0.80)

Standard: Evaluated via the reverberation room method (GB/T 20247-2006). Fully covers the 125 Hz ~ 4000 Hz frequency scale. Open-cell matrix acoustic capture severely outperforms closed-cell configurations, aligning with high-end global infrastructure design specifications.

Sound Reduction Index (Rw): 30.0 ~ 40.0 dB (Typical Performance ≥ 32.0 dB)

Sound Reduction Index (Rw): 30.0 ~ 40.0 dB (Typical Performance ≥ 32.0 dB)

Standard: Lab-tested per GB/T 19889.3-2005. Closed-cell matrices provide superior isolating power, pushing insulation efficiency above 0.9 at the critical 800 ~ 4000 Hz spectrum.

Acoustic Absorption Index: Measured at ≥ 0.7 at specific center frequencies.

Insertion Loss: 12.0 ~ 30.0 dB(A) (Standard Field Performance ≥ 15.0 dB(A))

Standard: Measured in full conformity with GB/T 19889.4-2005. Fully enclosed configurations achieve an isolation performance of ≥ 25.0 dB(A).

Structural & Mechanical Performance

Wind Load Resistance

Rated pressure ranges between ±3.8 ~ ±3.2 kPa

Deflection Limits

Max elastic deflection < Ls/130, residual deformation < Ls/600. Easily withstands Grade 10 to 12 seasonal typhoons.

Impact & Energy Absorption

Excellent impact damping properties, capable of absorbing energy ≥ 2.5 MJ/m³ at 50% structural compression. Under extreme vehicular collision tests, the metal maintains integrity with zero tearing or hazardous flying debris.

Aerodynamic Drag Coefficient

0.38 ~ 0.60 (Typical Range: 0.45 ~ 0.52)

Aerodynamics

Due to its high-porosity micro-textured face, wind drag is marginally higher than smooth acrylic or FRP options, but significantly lower than perforated metal corrugated panels.

Material & Structural Geometry

Geometrical Parameters

Panel depth ranges from 8 ~ 20 mm (Standard: 10 ~ 15 mm); pore diameter ranges from 0.3 ~ 7 mm with a total matrix porosity of 63% ~ 90%. Fully supports customized integrated open-cell and closed-cell composite structures.

Material Properties

Formulated via metallic melt foaming. Matrix density ranges from 0.27 ~ 0.64 g/cm³ with tensile strength ≥ 15 MPa. Provides extraordinary inherent metal damping (5 to 10 times higher than solid aluminum). Highly machineable for easy onsite cutting and drilling; supports diverse architectural topcoats.

Acoustic Backing Fill

Requires zero additional acoustic blankets or fiberglass fills. The aluminum foam itself delivers self-sufficient sound damping, preventing the risk of internal settling, degradation, or moisture logging associated with traditional glass wool.

Surface Mass Density

8.0 ~ 18.0 kg/m² (Typical range: 10.0 ~ 14.0 kg/m²; Light variant ≤ 12.0 kg/m²). Cuts system load by 60% to 80% compared to heavy alternatives, vastly optimizing old bridge reinforcement costs.

Standard DimensionsTotal panel thickness ranges from 40 ~ 60 mm (Standard: 50mm) with widths from 500 ~ 1000 mm. Unit configurations include:

  • 2000 × 800 × 50mm
  • 2500 × 800 × 50mm

for railway, and:

  • 1500 × 600 × 45mm

for municipal layout.

Custom lengths can be precisely tailored from 1000 ~ 6000 mm.

Weatherproofing & Life Safety Standards

Environmental Endurance

Inherently non-rusting and non-degrading under extreme temperatures from -40°C to +90°C. Exhibiting zero moisture retention, anti-aging properties, and zero toxicity. Certified to survive ≥ 2000 hours in neutral salt spray testing with zero distortion. Premium double-sided PVDF fluorocarbon coatings extend operational life in severe offshore or acid rain belts.

Design Service Life

≥ 25 Years (Standard: 25 ~ 30 years; premium coated models achieve 30+ years).

Fire Safety Rating

Grade A (Certified A1 Non-combustible)

Fire Safety

Fully compliant with GB 8624-2012. Being a metallic elemental block, it features an extremely high melting point. Under direct fire contact, it produces zero flame spread, zero molten dripping, and zero asphyxiating smoke or toxic fumes.

BENEFITS OF LUOFU HIGHWAY METAL NOISE BARRIER

1. Robust structural design ensures long-term structural safety.
2. Excellent noise reduction performance with a wide coverage range.
3. Deep expertise in acoustic R&D, backed by an independent R&D system.
4. Full-chain independent production with a comprehensive product lineup.
5. Supported by automated production lines, ensuring consistent precision in finished products.
6. Sophisticated anti-corrosion processes, ensuring a long service life in outdoor environments.
7. Rapid response throughout the entire pre-sales process, providing one-stop technical support.
8. Extensive experience in engineering projects, with a wealth of case studies both domestically and internationally.
9. Comprehensive after-sales service and flexible supply solutions, capable of handling both large and small orders.

Related Noise Barrier Products

Engineering & Technical Support

LUOFU Construction Materials provides professional turnkey B2B technical consultations for global structural engineers.

We provide:

  • Comprehensive crane-free rapid installation guidance for long-span viaduct projects
  • Specialized structural calculation sheets
  • Absorption spectrum mapping
  • High-precision trimming configurations to match non-standard H-post tracking channels

For further project integration details, please contact our engineering department.