ACO Tunnel

Proven materials with outstanding properties


The special composition of the materials and latest production technologies are what give ACO polymer concrete its outstanding profile: Due to the water absorption of the material and the local climatic conditions, DIN EN 1433 and DIN 19580 specify the need for the highest quality grade of "W" for concrete. As the material properties of polymer concrete are simply outstanding, no special requirements are made in this regard.

The raw materials found in ACO polymer concrete are subject to strict specifications and continuous quality controls. Further to the in-house quality testing according to DIN EN 1433, product checks and independent quality testing are also carried out by International Testing Institutes. 

At a similar density, ACO DRAIN® channel elements are much stronger and lighter than comparable concrete products. The low weight of the prefabricated parts makes it easier both to handle and install, and even reduces costs. Polymer concrete is waterproof and offers no potential for damage due to frost. The smooth surface allows water and dirt particles to simply run off while also making it easy to clean. What's more, polymer concrete needs no additional coatings to make it resistant to aggressive media, and can be used in the long term for many different purposes under extreme conditions. The special ACO polymer concrete compound for tunnel applications meets all classification requirements for a non-flammable building material.

The tunnel drainage line is part of the safety system in tunnels. Therefore it has to fulfill additional requirements on construction and material. The construction of the tunnel channel has the function of separating the escape way from the road and to hold the vehicle on line. The material requirement depend on the long-life functionality and the fire situation with flammable liquids. In case of a fire, the channel has to collect the aflame liquids without catching fire itself. Different national norms require different testing methods and results. ACO polymer concrete is classified “non-flammable“, which means that the channel is not conducive to conflagration. The fire-prevention classification is retested in frequent intervals by external institutes.

  • Flexural strength: > 22 N/mm2
  • Compressive strength: > 90 N/mm2
  • Modulus of elasticity: approx. 25 kN/mm2
  • Density: 2.1 – 2.3 g/cm3
  • Water penetration depth: 0 mm
  • Resistance to chemicals: high
  • Surface roughness: approx. 25 μm
  • Fire class: A2-s1, d0, M0, A1, BKZ 5.2, CI I


Cast iron material

The cast-iron products in the ACO range are manufactured in the ACO Group's own foundries. The products are subject to stringent quality checks and undergo independent quality testing by the Kaiserslautern Material Testing Office (MPA), Germany, in accordance with the applicable standard.

EN-GJL grey cast iron in accordance with DIN EN 1561
  • High corrosion resistance to waste water, de-icing agents and other environmental influences
  • High compressive strength: 600 to 1080 N/mm2
  • Ideal attenuation properties
  • Tensile strength: 100 to 350 N/mm2
  • Low breakage tension, low elastic distortion

These properties make grey cast iron the material of choice in the frames for manhole covers and gully tops.

EN-GJS spheroidal graphite cast iron in accordance with DIN EN 1563
  • High corrosion resistance to waste water, deicing agents and other environmental influences
  • High compressive strength: 700 to 1150 N/mm2
  • Moderate attenuation properties
  • High tensile strength: 350 to 900 N/mm2
  • High breakage tension, high elastic distortion

These properties make spheroidal graphite cast iron the ideal material for highly durable covers and gratings for low-weight manhole covers and gully tops.