👉Road Layer Thickness – Typical Pavement Section
🚥Road pavement is constructed in several layers, and each layer has a specific function.
⏺The required thickness depends on traffic loading, subgrade strength, climate, drainage, materials, and design life.
🌟Typical flexible pavement layers:
1. Wearing Course (BC/Asphalt): 40–60 mm — provides a smooth, durable and skid-resistant riding surface.
2. Binder Course (DBM): 50–120 mm — provides structural strength and distributes traffic loads.
3. Base Course (WMM/BM): 150–300 mm — carries and spreads wheel loads over the lower layers.
4. Granular Sub-base (GSB): 150–300 mm — provides drainage, support and load distribution.
5. Improved Subgrade: 200–600 mm where required — strengthens weak soil and improves pavement performance.
🗂Typical heavy-traffic flexible pavement example:
BC 40 mm + DBM 90 mm + WMM 250 mm + GSB 200 mm, over a properly compacted subgrade.
☄Rigid pavement: A concrete pavement may typically include a 200–300 mm PQC slab, 100–150 mm DLC, and 150–200 mm granular sub-base, with the subgrade prepared according to design requirements.
⚠️ Important: These are typical ranges, not universal design values.
⬇️Final pavement thickness should be determined through the applicable pavement design method using traffic, CBR/subgrade properties, drainage, materials and site conditions.
@etconp
🚥Road pavement is constructed in several layers, and each layer has a specific function.
⏺The required thickness depends on traffic loading, subgrade strength, climate, drainage, materials, and design life.
🌟Typical flexible pavement layers:
1. Wearing Course (BC/Asphalt): 40–60 mm — provides a smooth, durable and skid-resistant riding surface.
2. Binder Course (DBM): 50–120 mm — provides structural strength and distributes traffic loads.
3. Base Course (WMM/BM): 150–300 mm — carries and spreads wheel loads over the lower layers.
4. Granular Sub-base (GSB): 150–300 mm — provides drainage, support and load distribution.
5. Improved Subgrade: 200–600 mm where required — strengthens weak soil and improves pavement performance.
🗂Typical heavy-traffic flexible pavement example:
BC 40 mm + DBM 90 mm + WMM 250 mm + GSB 200 mm, over a properly compacted subgrade.
☄Rigid pavement: A concrete pavement may typically include a 200–300 mm PQC slab, 100–150 mm DLC, and 150–200 mm granular sub-base, with the subgrade prepared according to design requirements.
⚠️ Important: These are typical ranges, not universal design values.
⬇️Final pavement thickness should be determined through the applicable pavement design method using traffic, CBR/subgrade properties, drainage, materials and site conditions.
@etconp
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