Case Study: Ethafoam in Major Transport Projects

Background

Large-scale transport projects often face the challenge of controlling ground-borne noise and vibration, especially when infrastructure passes beneath or near residential areas, schools, and other noise-sensitive buildings. Ensuring community comfort and meeting strict acoustic standards requires reliable isolation materials with proven long-term performance.

Application of Ethafoam

What is Electrolysis and galvanic corrosion?

Galvanic Corrosion is the corrosion that occurs when two dissimilar metals are used together in a structure and exposed to an electrolyte (salt water, chemical, petrol) and the less noble of the 2 metals will corrode. For example; aluminum sheet with steel fasteners on a boat. Some pairings of metals are more at risk of . Check a galvanic series or chart.

Electrolysis is the acceleration of the galvanic corrosion when electricity is introduced to the metals in question. Connected by an , the less metal experiences accelerated galvanic corrosion.

while both processes involve metals and electrolytes, their dependence on an external voltage source distinguishes them.

Ethafoam has been successfully applied in major underground rail and metro projects as a ballast mat solution. It provides effective vibration and noise isolation between the track structure and surrounding environment. By reducing ground-borne noise, Ethafoam supports compliance with environmental standards while protecting the amenity of nearby communities.

Long-Term Durability

Ethafoam ballast mats have demonstrated exceptional long-term performance, with testing on samples taken after more than 20 years of continuous service showing that the material continued to meet noise isolation requirements. Even after decades of exposure to the demanding conditions of underground rail operations, Ethafoam retained its dynamic stiffness and functionality.

Technical Suitability

Ethafoam meets stringent technical requirements for major transport projects, including: Dynamic and static stiffness compliance across required load and frequency ranges. Resistance to mechanical stress, including point loads and horizontal forces from heavy rail traffic. Chemical and environmental durability for extended service life. Ease of installation with protection layers (e.g., geotextiles) to ensure performance is maintained. Ethafoam has consistently passed laboratory testing and project-based verification processes, including international standards such as DIN 45673-5, confirming its suitability for large-scale rail and metro applications.

Proven Benefits for Transport Infrastructure

Noise & Vibration Control: Significant reduction in ground-borne noise levels in residential areas above tunnels.Community Acceptance: Enhanced livability for communities located near transport corridors. Longevity: Performance sustained for decades under heavy, continuous use. Reliability: Trusted solution with technical approval in major transport projects.

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Density

Standard Size