There are millions of metres of surface dressing laid on our roads each year and it is still the most economical way of holding our road surfaces together by waterproofing, giving excellent texture and wearing properties on all classes of road.

The methods of road classifications, distribution of materials, weather forecasting and productivity have improved with technology over the years but occasionally we have partial failures.

Partial failures are extremely difficult to repair and can become dangerous if not attended to immediately, so the Ralumac solution is the proven method of repair.

Ralumac by its fluid nature can fill in the gaps whilst at the same time absorbing the excess bitumen into the regulating / base coat before laying the top coat, which gives a level surface acceptable to a new surface dressing application.

Typical details (0mm/8mm aggregate grading – alternative aggregate gradings are available)

Aggregate: Selected Coarse aggregates
Fine aggregate: High quality crushed aggregate
Filler: Ordinary Portland Cement
Skid resistance: Typically 65
Texture depth: Typically 1.3mm+
Marshall stability (KN): 10+
Flow value (mm): 4
Binder content: 5% - 8% by weight
Void content: 2% - 6% by volume
Coverage rate: Will very depending on the shape of the carriageway.

Application process: Ralumac is cold-applied through a specially designed continuous flow machine. Daily outputs in excess of 10,000sq. metres can be achieved with minimal disruption to traffic. Application is normally undertaken is layers with the initial regulating layer up to 30mm, followed by a uniform wearing course carpet of 8mm in thickness. The new Ralumac surface can be trafficked in 15 to 20 minutes. No rolling is required as the traffic action kneads the material, closing up the surface rendering it virtually impervious.

For more information on this product contact RMS here