Duralayer Multi ® / Duralayer Multi ®+

Duralayer Multi® is a dense material design for single layer applications. It is suited to a variety of asphalt surfacing applications where a low textured and deformation resistant one layer treatment is required.

Duralayer Multi was designed following a request from a local authority for a cost-effective, single layer solution. It utilises locally sourced aggregates and is suitable for a variety of applications including major roads, rural roads, housing estates, car parks, caravan parks and trench reinstatements.

The product’s unique design creates a low surface texture and controlled low air voids. This resists water
ingress, providing a more durable surfacing solution. Duralayer Multi doesn’t segregate like traditional materials, making it also ideal for handlay applications.

Duralayer Multi is available in 20mm, 14mm, 10mm and 6mm nominal sizes and is laid using conventional
paving equipment in line with BS 594987.

Duralayer Multi+
Utilises the same unique design as Duralayer Multi
and provides enhanced fuel resistance and stiffness.

Layer thickness

Details of constituent quality and layer thickness shown below:

6mm nominal size 30 – 60mm
10mm nominal size 40 – 80mm
14mm nominal size 50 – 100mm
20mm nominal size 60 – 150mm

Benefits

Single layer installation
Less disruption through quicker installation
Increased durability through low voids content
Low design void content assists compliance with SROH requirements
Prevents water ingress
Resistance to deformation
Sustainable product
Duralayer Multi+ has fuel resisting properties
100% recyclable

Also available in the following options:
era®/CleanAir®/CarbonLock®/RAP

Applications

All classifications of roads
Housing estates
Car and caravan parks
Footpaths
Trenches

Duralayer Multi technical data

Typical performance figures * Typical value for surface texture.

Material property	Test specification	Typical result
Design void content	BS EN 12697-6	≤ Vmax 5.0%
Water sensitivity	BS EN 12697-12 Method A (ITSR) BS EN 12697-23	≥ 80%
RTPD (wheel tracking)	BS EN 12697-22 Procedure B WTS in Air	≤ 1.0mm/10³ (40/60)