21. Factors affecting pavement design
Several factors affecting pavement design were discussed, primarily emphasizing the significance of wheel load. Pavements must accommodate moving loads, as static or slow-moving loads can be harmful. Additionally, temperature plays a crucial role in pavement design, particularly regarding frost action, which is critical in colder regions.
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What we have learnt
- Traffic load is a major concern in pavement design.
- The structural model helps in analyzing pavement responses to wheel loads.
- Material characterization is essential for determining the properties of pavement layers.
Key Concepts
- -- Wheel Load
- The load imposed by the weight of the vehicle's wheels on the pavement, crucial for determining the required pavement depth to prevent subgrade failure.
- -- Layered Elastic Model
- A structural model used to compute stresses and deformations in pavement layers assuming they are homogeneous, isotropic, and elastic.
- -- Environmental Factors
- The influences of temperature and precipitation on the performance and durability of pavement materials.
- -- Resilient Modulus
- The elastic modulus of materials under repeated loads, reflecting the material's ability to recover from deformation.
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