Sage-Tips

What is the primary function of the pavement structure?

The primary function of a pavement is to transmit loads to the sub-base and underlying soil. Modern flexible pavements contain sand and gravel or crushed stone compacted with a binder of bituminous material, such as asphalt, tar, or asphaltic oil. Such a pavement has enough plasticity to absorb shock.

Why is the quality of pavement important?

Pavements are an integral part of this roadway network. Pavements provide a smooth and durable all-weather traveling surface that benefits a range of vehicles (cars, trucks, buses, bicycles) and users (commuters, commercial motor carriers, delivery and service providers, local users, leisure travelers).

Why do we use high quality materials as we go from bottom to top of the pavement structure?

Based on this, flexible pavement may be constructed in a number of layers and the top layer has to be of best quality to sustain maximum compressive stress, in addition to wear and tear. The lower layers will experience lesser magnitude of stress and low quality material can be used.

What is a pavement structure?

Overview. A highway pavement is a structure consisting of superimposed layers of processed materials above the natural soil sub-grade, whose primary function is to distribute the applied vehicle loads to the sub-grade.

Which of the following is not a primary function of pavement?

Which of the below is not a primary function of a pavement? Explanation: The presence of pavement does not ensure traffic reduction, there are specific measures and modifications to be done to the pavement. Waterproofing is necessary to avoid waterlogging and seeping into the subgrade.

What are the functions of wearing course of a pavement layer?

Surface (or Wearing) Course: This is the topmost layer; its function is to provide a smooth, strong, abrasion-resistant and reasonably impervious course. Since it is directly in contact with the vehicle tyres, it has to resist the imposed wheel loads and transmit them safely to the layer below.

How do you determine the quality of pavement?

The following tests are conducted to assess the suitability or quality of bitumen for specific use as a paving material and also for read making:

1. Specific Gravity:
2. Solubility:
3. Spot Test:
4. Water Content:
5. Paraffin Scale:
6. Viscosity:
7. Penetration:
8. Float Test:

Which of the below is not a primary function of a pavement?

What is the function of sub base?

The function of a subbase is to help prevent pumping of fine-grained, subgrade soils. Pumping, which leads to the loss of soil material beneath slab edges and joints, occurs when three factors exist in combination: pumpable soils, excess water under the pavement, and frequent heavy truck loads.

Why is a pavement called a pavement?

The term pavement comes from Latin pavimentum, meaning a floor beaten or rammed down, through Old French pavement. The meaning of a beaten-down floor was obsolete before the word entered English. Pavement laid in patterns like mosaics were commonly used by the Romans.

What are the objectives of pavement design?

The objective in the design of the road pavement is to select appropriate pavement and surfacing materials, types, layer thicknesses and configurations to ensure that the pavement performs adequately and requires minimal maintenance under the anticipated traffic loading for the design life adopted.

What are the functions of wearing course and aggregate base layer in flexible pavement?

Base courses are usually constructed out of crushed aggregate or HMA. Subbase Course. The layer between the base course and subgrade. It functions primarily as structural support but it can also minimize the intrusion of fines from the subgrade into the pavement structure and improve drainage.