Subhead 16.0: Road Work

Subhead 16.0: Road Work

This section covers the specifications for various types of road construction and maintenance tasks, ensuring that they are executed with precision and high standards of quality. Here is a detailed breakdown of the typical content covered under this subhead:

16.1 Earthwork

• Excavation: Includes excavation for road formation, side drains, and borrow pits.
• Embankment Construction: Specifications for constructing embankments with suitable materials and compaction methods.
• Compaction: Ensuring proper compaction of the subgrade to achieve desired density and stability.

16.2 Sub-Base and Base Courses

• Granular Sub-Base (GSB): Laying and compacting granular sub-base material.
• Wet Mix Macadam (WMM): Laying, spreading, and compacting wet mix macadam for base courses.
• Prime Coat: Application of a prime coat over the granular base to prepare the surface for subsequent layers.

16.3 Bituminous Works

• Tack Coat: Application of a tack coat over the prepared base to enhance the bond between layers.
• Bituminous Macadam: Laying and compacting bituminous macadam as a base or binder course.
• Dense Bituminous Macadam (DBM): Laying and compacting dense bituminous macadam for binder and base courses.
• Bituminous Concrete (BC): Laying and compacting bituminous concrete for wearing courses.

16.4 Surface Dressing

• Single Coat: Application of a single coat of surface dressing to improve skid resistance and waterproofing.
• Double Coat: Application of a double coat of surface dressing for enhanced durability and performance.

16.5 Cement Concrete Pavement

• Laying: Specifications for laying and compacting cement concrete pavement.
• Joints: Construction of contraction, expansion, and construction joints in cement concrete pavements.
• Curing: Ensuring proper curing of concrete pavements to achieve desired strength and durability.

16.6 Road Markings and Signages

• Pavement Markings: Application of reflective and non-reflective road markings using appropriate materials.
• Signages: Installation of traffic signages, including regulatory, warning, and informatory signs.

16.7 Kerbs and Gutters

• Construction: Specifications for constructing kerbs and gutters using concrete or stone.
• Alignment: Ensuring proper alignment and levels of kerbs and gutters for effective drainage.

Examples:

1. Construction of a New Road:

   • Earthwork: Excavation to the required depth, construction of embankment, and compaction of subgrade.
   • Sub-Base: Laying and compacting granular sub-base material.
   • Base Course: Laying wet mix macadam, followed by the application of a prime coat.
   • Bituminous Layers: Application of tack coat, laying bituminous macadam, dense bituminous macadam, and bituminous concrete.
   • Finishing: Surface dressing, road markings, and installation of signages.

2. Maintenance of an Existing Road:

   • Surface Dressing: Application of a single or double coat surface dressing to improve skid resistance and waterproofing.
   • Repairs: Patching potholes and cracks using bituminous material.
   • Kerbs and Gutters: Repairing or replacing damaged kerbs and gutters to ensure proper drainage.

3. Construction of a Cement Concrete Pavement:

   • Laying: Pouring and compacting cement concrete for the pavement.
   • Joints: Creating contraction, expansion, and construction joints to prevent cracking.
   • Curing: Ensuring proper curing to achieve desired strength and durability.

Wed May 1, 2024