Asphalt Mastic
Dense bituminous surfacing for specified heavy-duty, bridge-deck or flyover applications.
TECHNICAL ROADWORK REFERENCE
Road Construction & Bitumen Work Specification
Understand the typical bituminous and concrete pavement layers used when planning road construction, resurfacing and infrastructure work.
How to use this reference
The final pavement structure is selected from site conditions, traffic or loading needs, levels, drainage, drawings and the agreed project specification. This page explains the role of common roadwork layers without replacing project-specific engineering details.
Typical bituminous pavement layers
Sealcoat
Protective surface treatment used where the pavement specification calls for it.
Asphalt Concrete / BC
Bituminous wearing course used to provide the final running surface.
Dense Bituminous Macadam / DBM
Dense binder course placed below the wearing course in suitable pavement designs.
Bituminous Carpet
Thin bituminous surface course used for selected road and maintenance applications.
Bituminous Macadam / BM
Open-graded bituminous base or binder layer used where specified.
Wet Mix Macadam / WMM
Graded aggregate base prepared and compacted below bituminous layers.
Granular Sub-Base / GSB
Granular supporting layer above the prepared formation.
Rubble Soling
Stone layer used for foundation support where required.
Excavation / Embankment
Earthwork used to form the road level and prepare the formation.
Typical concrete pavement layers
PQC
Pavement Quality Concrete forming the main concrete running slab.
TMT Steel Bar
Reinforcement used where the approved concrete design requires it.
PVC Sheet / Membrane
Separation or membrane layer used according to the specified pavement build-up.
DLC
Dry Lean Concrete base below the pavement slab.
Granular Sub-Base
Prepared granular support layer below the concrete pavement system.
Rubble Soling
Stone foundation layer used where required by the design.
Excavation / Embankment
Earthwork and formation preparation for the required road level.
Planning & coordination
Line, level, drainage, layer preparation, material selection, compaction and finishing are coordinated with the approved scope. For execution pages, see Bituminous Road Construction, Cement & Concrete Road Construction, Bituminous Road Resurfacing and Bituminous Mastic Work.
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