Fiberglass Reinforced Plastic Noise Barrier
Product Overview
FRP Reinforced Plastic Noise Barrier features a premium Fiberglass Reinforced Plastic (FRP) structural outer shell integrated with a three‑dimensional open‑cell aluminium foam acoustic core. Engineered for excellent structural durability, an optimized lightweight profile, and broad‑spectrum acoustic mitigation, this system is specifically designed for high‑velocity transit networks, urban viaducts, road tunnel portals, and heavy industrial or high‑pollution environments.
Core Advantage
It serves as a superior alternative to traditional heavyweight concrete or fatigue-prone perforated metal panels, making it the premier choice for minimizing structural girder dead loads while maintaining maintenance-free performance.
Product Series & Primary Applications
ECP-Transit Pro (Heavy-Duty Transit Series)
Composition: High-strength molded FRP outer shell with a 30 mm open-cell aluminium foam core, engineered for maximum wind load resistance and extended service lifecycles along main transit corridors.
Applications:
- Expressways
- High-speed rail lines
- Elevated highways
- Tunnel openings
Key Metrics: Wind pressure resistance up to ±4.5 ~ ±6.0 kPa, Fire Rating Grade A1, Rw ≥ 38 dB.
ECP-Municipal Light (Urban Lightweight Series)
Composition: Optimized thin-profile, high-tenacity FRP matrix with a 20 mm high-porosity core designed to drastically lower structure-borne loading and enable rapid modular installation.
Applications:
- Urban viaducts
- Elevated light rail/metro lines
- Municipal roads adjacent to residential areas
Key Metrics: Ultra-low surface density ≤ 50.0 kg/m², streamlined installation, and fully customizable span arrangements.
Core Technical & Performance Specifications
Acoustic Performance
Noise Reduction Coefficient (NRC): 0.60 ~ 0.80 (Standard Configuration ≥ 0.70)
Testing Standard: Evaluated via the reverberation room method (GB/T 20247-2006). Provides balanced broadband absorption across the entire 125 Hz ~ 4000 Hz spectrum, simultaneously mitigating low-frequency traffic shockwaves and high-frequency mechanical noise.
Sound Reduction Index (Rw): 28.0 ~ 38.0 dB (Typical ≥ 30.0 dB)
Technical Detail: Laboratory-tested per GB/T 19889.3-2005. Specialized industrial configurations achieve 35.0 ~ 38.0 dB, outperforming conventional solid acrylic sheet alternatives.
Acoustic Absorption Coefficient: Achieves ≥ 0.7 at target critical frequencies to deliver highly efficient sound damping.
Insertion Loss: 10.0 ~ 28.0 dB(A) (Standard Field Performance ≥ 12.0 dB(A))
Technical Detail: Field-tested in full compliance with GB/T 19889.4-2005. Top-curved or full-arched aerodynamic geometries can increase localized acoustic shielding to ≥ 23.0 dB(A).
Structural & Mechanical Performance
Wind Load Resistance: Rated at ±4.0 ~ ±5.5 kPa
Deflection Limits:
Maximum elastic deflection < Ls/140 and residual deformation < Ls/650. The standard configuration withstands Grade 11 to 13 typhoons (wind speeds of 24.5 ~ 36.9 m/s); heavy-duty variants with 15 mm shell thickness withstand wind loads up to ±5.5 kPa.
Impact Resilience:
Evaluated using an 800g steel ball dropped from a 1.0m height. Post-test results show zero cracking, zero fragmentation, and zero penetration. Surface indentation is strictly confined to ≤ 3.5 mm with no structural distortion or flying debris.
Drag Coefficient:
0.38 ~ 0.58 (Typical range: 0.42 ~ 0.50)
Aerodynamics: The highly smooth exterior surface combined with a micro-curved profile minimizes wind resistance. This significantly reduces the fatigue load transferred to the steel H-posts and concrete bridge foundations compared to traditional corrugated metal barriers.
Geometrical Parameters
Panel Structural Details:
Shell face thickness ranges from 6 ~ 15 mm (Standard: 8 ~ 12 mm); surface flatness deviation ≤ 0.2 mm/m; shell perforation rate ranges from 18% ~ 25% (Transit Pro: 22%, Municipal Light: 20%). Optional closed-cell non-permeable backings are available upon request.
FRP Material Properties:
Formulated with premium fiberglass-reinforced resin. Density ranges from 1.4 ~ 1.6 g/cm³, tensile strength ≥ 180 MPa, and flexural strength ≥ 250 MPa. Completely rust-proof without any requirement for exterior painting.
Durability, Safety & Standards
Corrosion & Weather Damping:
Treated with an advanced fluorocarbon (PVDF) or dedicated weatherproof topcoat. Certified via neutral salt-spray testing to guarantee ≥ 1500 hours with zero degradation, cracking, or color deviation. Operates reliably in extreme service temperatures from -40°C to +80°C (core matrix stable up to +150°C); highly resistant to acid rain, alkaline exposure, and UV aging.
Design Service Life:
≥ 25 years under aggressive outdoor atmospheric conditions, minimizing long-term Lifecycle Costing (LCC) and eliminating field maintenance.
Fire Safety Rating:
Grade A (Certified A1 Non-combustible)
Testing Standard:
Fully compliant with the GB 8624-2012 standard. The FRP shell, structural resins, and internal aluminum foam core are entirely non-burning or fire-retardant. Under extreme thermal exposure, the assembly does not catch fire, generates no molten droplets, and emits zero toxic gases or heavy smoke, fulfilling critical life-safety criteria for tunnels, underpasses, and dense urban corridors.
Acoustic Core (Aluminium Foam) Specifications
Physical Geometry:
Interconnected open-cell matrix with structural thicknesses of 20 mm or 30 mm. Core density ranges from 0.35 ~ 0.6 g/cm³, pore size is strictly controlled at 1.0 ~ 3.0 mm, and internal porosity reaches 80% ~ 90%.
Core Acoustic Performance:
Core material independent NRC ≥ 0.65; weighted sound absorption coefficient αw ≥ 0.60; sound absorption coefficient from 500 ~ 4000 Hz reaches 0.7 ~ 0.9.
Surface Mass Density:
10.0 ~ 20.0 kg/m² (Standard: 12.0 ~ 16.0 kg/m²; Ultra-lightweight configuration ≤ 13.0 kg/m²). Reduces self-weight load demands on support structures, making it highly ideal for retrofitting older elevated viaducts.
Modular Dimensions:
Standard panel depth ranges from 35 ~ 55 mm (Standard: 45 mm) with widths from 500 ~ 800 mm. Standard modular sizes include 2000×600×45mm and 2500×600×45mm for heavy transit, and 1500×500×40mm for municipal layouts. Panel length can be fully customized from 1000 ~ 6000 mm to seamlessly match existing steel H-post centrelines.
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.
Technical Support & Engineering Customization
LUOFU Construction Materials is dedicated to providing comprehensive engineering solutions for international infrastructure noise control. We offer specialized project services including structural wind-load calculation validation, support steel H-post configuration, on-site acoustic mapping, and custom NRC/Rw optimization tailored to specific traffic frequency profiles. For engineering consultation, formal structural calculation sheets, or custom structural panels (lengths up to 6000mm), please contact our engineering department.
