What is the Aashto method?
The current AASHTO method is a regression method based on the results of road tests. The AASHTO method utilizes an index termed the “structural number” (SN) to indicate the required combined structural capacity of all pavement layers overlying the subgrade.
What are the methods to design flexible pavement?
Two methods of flexible pavement structural design are common today: Empirical design and mechanistic empirical design.
What is pavement design?
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. Improper design of pavements leads to early failure of pavements affecting the riding quality.
What are the different types of pavement?
Rigid pavements can be classified into four types,
- Jointed plain concrete pavement (JPCP),
- Jointed reinforced concrete pavement (JRCP),
- Continuous reinforced concrete pavement (CRCP), and.
- Pre-stressed concrete pavement (PCP).
What is the main design criterion for designing the rigid pavement?
What is the main design criterion for designing the rigid pavement? Explanation: Rigid pavement is not flexible i.e. it is not elastic in nature. The deformations once formed due to the tensile stress are not reversible. They tend to develop into big cracks later on.
What does AASHTO stand for?
American Association of State Highway and Transportation Officials
The American Association of State Highway and Transportation Officials (AASHTO) is a standards setting body which publishes specifications, test protocols, and guidelines that are used in highway design and construction throughout the United States.
Which of the following method is not used for design of flexible pavements?
The design method for flexible pavements is not based on which of the below options? Explanation: It has not been able to establish a rational method for the design of flexible pavements. Therefore, methods based on soil classifications, soil strength and subgrade support have been used.
What is pavement analysis?
It is a measure of material stiffness and provides a mean to analyze stiffness of materials under different conditions, such as moisture, density and stress level. It is also a required input parameter to mechanistic-empirical pavement design method.
What does pavement design include?
The Superpave pavement design models cover four areas: material property, environmental effects, pavement response, and pavement distress.
What are the various factors to be considered in pavement design?
Factors Affecting Pavement Design
- Wheel load.
- Axle configuration.
- Contact pressure.
- Vehicle speed.
- Repetition of loads.
- Subgrade type.
- Temperature.
- Precipitation.