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Bituminous pavement
- The subgrade is a compacted soil layer.
- The base and sub-base course could
be made up of bound or unbound granular layer.
As per Indian specifications (MORT&H
2001), some examples of base or sub-base layers
are: Granular sub-base(GSB), Water Bound Macadam
(WBM), Wet Mix Macadam (WMM) etc.
- The binder course is made up bituminous material. As per Indian specifications (MORT&H 2001), some examples of binder course are: Bituminous Macadam (BM), Dense Bituminous Macadam (DBM) etc.
- The wearing course is the top bituminous layer which is comes in contact to the vehicle tyre. Wearing course provides impermeability to the pavement surface against water percolation (Chakroborty and Das 2003). The binder course and wearing course together are called bituminous surfacing.
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