Hot rolled asphalt SMA

Lagan produce Hot Rolled Asphalt or HRA as it is commonly known at all of its asphalt plants. HRA is almost exclusively used in Ireland & the UK due to the wet climatic conditions.

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Hot rolled asphalt SMA

The mix is made up of a high percentage of bitumen & filler combined with sand & coarse aggregate to produce a very water tight & durable surface coarse material. Precoated chips are then applied & rolled in on-site to give the finished material its excellent skid resistance properties. HRA is a surface course material but different types of HRA can be used as a binder layer for industrial or residential applications.

Benefits & key features

  • HRA is manufactured in accordance with EN 13108-4
  • HRA is a gap graded mixture that typically contains 30 – 35% coarse aggregate with the remainder of the mixture made up of fine sand & filler that are blended with bitumen.
  • The material when laid will appear very smooth due to the high fine sand content, after the precoated chippings are applied the material takes on  a new appearance with the precoated chips embedded in the pavement producing a good textured material with high skid resistance properties.

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