Other benefits of asphalt roads include durability, improved safety and comfort, reduction in noise pollution, ease of access for utility repairs and reduction of traffic emissions from resulting congestion. Benefits of asphalt roads Roads fulfil…
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Structural layers
The asphalt layers consist of three tiers – a surface course, a binder course and an asphalt base course – and together these constitute the top layer of the road structure. There are a wide range of surface…
Structural design
A typical asphalt road construction is multi-layered in form, comprising bitumen-bound and unbound materials. Essentially, the lower indigenous subgrade layer is covered by a bound or unbound sub-base, providing drainage and frost protection for the subgrade, and a road…
Built to last
Modern asphalts roads, with a structurally solid base course and protective replaceable surface wearing course, are now designed to last for over 40 years and with correct surface maintenance they can, and do, last even…
