The case studies presented below cover a wide range of applications including roads over soft ground, slope repairs, retaining walls and river and flood protection works. These applications exploit the key characteristics of PAS108 tyre blocks such as their lightweight, their high porosity and permeability, the fact that they are relatively inert, their ease of handling and their versatility.

It is clear that the manufacture of tyre blocks and their subsequent use in construction is a highly effective and beneficial use of end of use tyres and has considerable potential for the future.

Tyre Flood defence project, River Witham, UK

Anglo Environmental supplied 12,000 PAS108 tyre blocks for this project which won the prestigious Flemming award sponsored by Skanska Cementation Foundations. The project invloved strengthening and refurbishing of the flood defence embankments between lincoln and boston in Lincolnshire. The project took just 4 months and serviced around 1.5km of the river embankment during the winter months, something that would not have been possible using conventional clay materials.

Landfill cell drainage layer project, UK

Example of a landfill cell drainage layer project, PAS108 Trye blocks supplied by Anglo Environmental. Method statements available for synthetic and clay liners.

Access road over landfill cell, Essex, UK (2003)

Over 1000 PAS108 Tyre blocks supplied by Anglo Environmental

Dam wall project ,Hampshire , UK

Dump truck driving over PAS108 Blocks over a landfill cell drainage layer.

Dump truck driving over PAS108 Tyre Blocks over a landfill cell drainage layer.

Road Construction Over Soft Ground, Chautauqua County, New York State, USA

Road Construction Over Soft Ground, Chautauqua County, New York State, USA

The Chautauqua County Department of Public Facilities have led a total of five projects involving the use of lightweight PAS108 tyre blocks as a subgrade replacement for roads over soft ground. The PAS108 tyre blocks resulting from the clean up of the Levant tyre dump and from the ongoing tyre amnesty programme were used in these projects.

Access Road over Soft Ground, Nether Dallachy Landfill Site, Fochabers, Moray, UK

The landfill is located at a former sand and gravel quarry near the Moray Firth. The site is typically 5m to 5.5m above Ordnance Datum and low lying parts of the site are subject to flooding in the winter due to seasonal variation in the ground water level. An extension to the existing haul road was required to service a new landfill cell. The surface of the existing haul road is 6.15m above Ordnance Datum (AOD), up to 1.5m of upfill (average 1.0m) was required to ensure the new road was not subjected to winter flooding.
- Picture courtesy of Northern Tyre Recycling Ltd.

Slope Failure Repair, Interstate Highway 30, Tarrant County, Texas, USA

The remediation of soil cut slope instability in Tarrant County, Texas has conventionally been achieved using existing or imported soils, with or without modification by hydraulic binders and often in conjunction with an 'H'-beam wall, in order to minimise costs and construction time. More recently consideration has been given to the use of PAS108 tyre blocks as a partial replacement for soil fill. This approach is considered likely to significantly improve the subsequent long-term stability of the repair, while also providing the benefit of reusing waste tyres. This is especially significant where the in-situ soils comprise high plasticity clays, which may be marginally suitable for such applications, highly moisture sensitive and inherently unstable. Surface or groundwater seepage also may be a contributing factor to slope instability as this region frequently experiences high intensity storms.

Example of reed bed project.

Various ponds for reed bed drainage projects are being built throughout the UK using the blocks as the first line of drainage down to a secondary high-tec SUDS system to reduce foul water to clean.
- Picture courtesy of Northern Tyre Recycling Ltd