Ireland

Low Energy Bound Mixtures (LEBM)

Low Energy Bound Mixtures (LEBM) can be used in the Base and Binder layers of a pavement. The product is a blend of different coarse aggregate sizes, fine aggregate, cement and foamed binder.

When combined the end product is generally a dense, continuously graded mixture that derives strength from the aggregate interlock and hydraulic reaction with the cement.

LEBM is an environmentally beneficial product as it is made cold with a variety of materials including recycled products such as crushed concrete and reclaimed asphalt.

Benefits & Key Features

LEBM handles like a granular material and remains workable until compaction and moisture migration is complete, after which it becomes harder and reaches a strength comparable with hot mix bituminous materials.
LEBM is placed by normal hotmix paving and compaction equipment.

Sustainable benefits

LEBM utilises a wide range of marginal and recycled materials, thus conserving local aggregate resources.
The production plant is energy-efficient, quiet and low emission, the plant is mobile and hence can travel to the source of the constituents so reducing truck movements. with no chemicals added to the process.
LEBM is mixed and laid cold, allowing greater on-site flexibility, whilst the materials can be stockpiled for up to four weeks in advance of laying.
Although LEBM handles like a granular material, its cured stiffness enables the overall pavement thickness to be reduced compared with granular alternatives.
LEBM uses proven technology approved by TII and local authorities for many years.

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