3. Bituminous mix design
Bituminous mix design involves determining the proportions of bitumen, fillers, fine, and coarse aggregates to create a mix that is workable, strong, durable, and economical. Key objectives include ensuring durability, strength, flexibility, and workability of the mix, alongside considerations for stability, durability, flexibility, skid resistance, and workability. Various types of mixes, such as well-graded, gap-graded, and open-graded, as well as their respective requirements and compositions, are outlined for effective pavement construction.
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What we have learnt
- The bituminous mix design ensures durability, strength, and flexibility in road construction.
- Different types of mix designs affect the properties like skid resistance and workability.
- Desirable characteristics of a bituminous mix include stability, economic feasibility, and resistance to weathering.
Key Concepts
- -- Bituminous Mix Design
- A method to determine the correct proportions of aggregates and bitumen to ensure a stable, durable, and workable pavement.
- -- Types of Mix
- Various formulations of bituminous mixes including well-graded, gap-graded, and open-graded mixes, each serving different performance criteria.
- -- Durability
- The ability of the mix to resist environmental factors and abrasive actions over time.
- -- Stability
- The resistance of the paving mix to deformation under traffic loads.
- -- Flexibility
- The capacity of the pavement to withstand bending under traffic loads without cracking.
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