Overview
This comprehensive method statement covers the placing of bituminous pavement for construction projects. It includes step-by-step procedures, material specifications, equipment requirements, and quality control measures.
Scope of Work
The scope includes preparation of sub-base, application of prime coat, laying of bituminous base course and wearing course, compaction, and finishing operations.
Materials
- Bitumen (60/70 penetration grade)
- Coarse aggregates (crushed)
- Fine aggregates
- Filler material
- Prime coat (MC-70)
- Tack coat (RC-70)
Equipment
- Asphalt paver
- Vibratory roller (10-12 ton)
- Pneumatic tire roller
- Bitumen sprayer
- Dump trucks
Step-by-Step Procedure
1. Sub-base Preparation
Ensure the sub-base is compacted to the required density. Check levels and grade. Clean the surface of all debris and loose material.
2. Prime Coat Application
Apply prime coat (MC-70) at a rate of 1.0-1.5 kg/m². Allow to penetrate for minimum 24 hours before proceeding.
3. Tack Coat Application
Apply tack coat (RC-70) on the prepared surface at a rate of 0.3-0.5 kg/m² immediately before laying asphalt.
4. Asphalt Mixing
Heat aggregates to 150-170°C and bitumen to 140-160°C. Mix in the asphalt plant to achieve the specified mix design.
5. Transportation
Transport the hot mix asphalt in covered trucks to maintain temperature above 130°C.
6. Laying
Lay the asphalt using a mechanical paver at a temperature not less than 120°C. Maintain uniform thickness and grade.
7. Compaction
Begin compaction immediately after laying. Use vibratory roller for initial passes, followed by pneumatic tire roller for intermediate passes, and finish with static roller.
Quality Control
Check temperature at all stages. Verify thickness with cores. Test density using nuclear density gauge. Check surface tolerance with straight edge.
Health & Safety
All personnel shall wear appropriate PPE including heat-resistant gloves, safety boots, and high-visibility vests. Ensure adequate ventilation when working with hot bitumen.
