Northstone

The system provides a structurally sound road surface up to a depth of 300 mm using the existing road materials and adding foamed bitumen or emulsion with cement. It provides an excellent base or binder course in preparation to take a surface course material.

Typical Applications

Is suitable for all classes of roads and is ideal for:

• New Construction  and Design and Build Projects.
• Bog rampart roads where additional loading by conventional means will cause rapid failure.
• Roads and street-works where existing level constraints prevent raising the road by more than the surface course.
• Roads where existing utility equipment prevents excavation and full  reconstruction.
• Roads where suitable quarry materials are  not readily available.

Envirnomental Benefits

• Reduced traffic movements on public roads through a reduction in materials delivered to and from site resulting in a lower carbon footprint
• Reduced CO₂ emissions and lower energy consumption through a reduction in the volume of hot material required.
• Weak materials which are strengthened and re-used on site don't get sent to land-fill, thus increasing environmental and economic benefits.
• Extending life of existing rock reserves through more sustainable extraction due to the recycling of existing pavement materials.

Preparation and Installation

The process involves the pulverisation of the existing road surface up to a maximum depth of 300 mm. Rock fines can be added at this stage if tests determine that the p materials are too coarse. The pulverised material is than graded to the required levels and compacted. Stabilisation then takes place with cement being added to the new surface at a pre-determined rate of spread. The surface is then pulverised again with Foam Bitumen  injected into to the mix. The surface is then regraded and compacted in preparation for a regulating or surface course finish.