HBM / CBGM

Roadways has been producing high-quality concrete for over 12 years.

Our recipe conforms to the relevant technical standards and we use external UKAS accredited laboratories for regular testing.

As a locally produced recycled material, there are significant carbon savings from reduced road transport & quarrying activity.

HBM is a lean mix concrete made from road planings and recycled Type 1.

The raw materials are crushed to size 0-20mm, cement and water is added, then the product is mixed.

We target a strength between 5 and 10 Newtons per mm2 which complies with TRL 611 and series 800 of the Specification for Highways Works.

HBM can be used on kerb bedding and backing, drainage, haunching, around manholes.

Sub base for patios, paths, drives and roads.

Mass concrete fill.

Temporary running surfaces, haul roads and site compounds.

HBM has been an approved highways standard for over a decade.

It’s been used to build many roads and was used as sub-base in the Polegate bypass and Newhaven Port access road.

We plane and excavate roads going deeper than some other highways companies by digging to a depth of eg 280-390mm from existing levels, instead of only planing off 50-80mm of asphalt.

We supply and lay recycling HBM to an average depth of eg 290mm.

We apply asphalt then replace kerbs and block paving.

Normally, asphalt contaminated with tar cannot be recycled back to hot asphalt as when it is heated it becomes carcinogenic.

Unfortunately it usually goes to the landfill.

During these projects all dug out material - including that contaminated with tar asphalt - are recycled and put back in the same road.

The road’s sub-base is made of recycled dig-out, with the addition of added recycled material and strengthening agents.

Not only have we saved on waste going to landfill but on the use of new aggregates, the carbon footprint of transportation and the effects on marine life from sea drenching.