Grass Concrete provides reinforcement system

Grass Concrete has designed a self draining grass reinforcement system, Grasscrete, to meet the demands of both infrastructure and the environment.

Grasscrete supplies the key component material in critical flood alleviation systems across the UK.

Grass Concrete has recently installed the Grasscrete system as part of the Cobbins Brook Flood Alleviation Scheme close to Waltham Abbey in Essex.

At Cobbins Brook the large expanse of river spillway required an effective overspill drainage management system.

Grasscrete was selected as a first choice environmental alternative.

The Cobbins Brook project has seen a combination of excavation and embankments around the spillway and pump station.

The system installed used GC2 with A252 reinforcing mesh in a 150mm slab.

The total installation time for Grasscrete was 10 weeks.

At Cobbins Brook the spillway slope is designed to handle high impact water flow from the pump station.

Grasscrete has approved test flow rates in excess of 8m/second, a critical benefit in the design of grassed waterways.

A single vast Grasscrete slab provides the stability; it provides a continuously reinforced structure with none of the stability problems that can be a factor with pre-cast types.

At Cobbins Brook the 150mm thick system is soiled and seeded throughout.

The ribbed profile within the soil pocket helps to anchor the roots against erosion.

Grasscrete cover helps maintain a green environment; the system allows natural vegetation to establish whilst at the same time performing its vital structural function.

At Cobbins Brook the access roads are also constructed of Grasscrete on two levels to the pumping station, the plus side is the system can be virtually trafficked immediately.

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