Ecosave ® protect


Operating principle

Operating principle
  1. The stormwater flows via the joints into the lightweight aggregate core concrete
  2. When this storage layer is completely full, excess water seeps away via the subgrade
  3. The rain run-off is cleaned in the joints and in the concrete
  4. Following the rain event, the stored water evaporates into the atmosphere via the joint

Video: Operating principle

Water-permeable pavings from the ECOSAVE protect line carry a DIBt approval as a stormwater treatment plant.

This means that the tested systems are capable of filtering, converting and /or degrading ecologically risky pollutants so that our bodies of water including groundwater can be protected.Therefore, the pavements are also permitted for traffic areas on which conventional eco-pavings are taboo today.

This means traffic areas such as residential streets, car and lorry car parks or yard and commercial areas with more than 300 vehicle movements daily. These areas must in any case be paved for use by traffic. With ECOSAVE protect it is now possible to treat stormwater decentrally in these sensitive areas in keeping with water protection - in other words, to simply let it seep away.

The stormwater flows via the joints or the porous concrete stones into the substrate. In the new condition the permeability of the systems must be higher than 540 l/(sxha) – much more than any stormwater or mixed water sewer can accept. The pollutants are mainly collected in the top two centimetres of the joint material. The seepage capacity reduces over the course of time. Therefore, the pavements must be regenerated after about 10 to 15 years using a suitable cleaning method. A large part of the pollutants is removed and disposed of in the process.The top two centimetres of the joint are renewed.

A special hybrid stone can do much more than this. It stores the stormwater in a lightweight aggregate concrete storage layer. The facing concrete layer of the concrete stone is impermeable; the water only penetrates into the concrete stone via the joints. Up to 10 mm precipitation are stored intermediately and given off to the atmosphere again after the rain event. Only excess water is seeped. Annual evaporation rates of up to 50% can thus be attained. The green surface for road traffic.

Technical data

Ecosave protect
  • Paving for load classes up to 3.2 according to RStO (Guidelines for the standardisation of the superstructures of traffic areas)
  • Cleaning function with DIBt approval
  • Permeability in new condition > 200 mm/h
  • Permanent permeability > 100 mm/h
  • Run-off co-efficient 0.0 possible
  • Hydraulic conductivity up to soil kf 1·10-6 m/s
  • Discharge via subgrade drainage is necessary in case of lower kf values


Ecosave protect
  • General building authority approval from the DIBt
  • Paving system gd-protect Z-84.1-13
  • Paving system hp-protect Z-84.1-14
  • Conforms to all rules for the paving construction method in Germany
  • Meets the requirements of the data sheet for seepage-capable traffic areas (MVV) of the FGSV (German Road and Transportation Research Association)
  • Meets the requirements of the DWA A 138
  • In-situ measurements available
  • Proof of the evaporation performance from in-situ measurements is available

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