Before we differentiate between flexible pavements and rigid pavements, it is better to first know about them. Joints are required in flexible pavements Construction joints are not required.
PPT DESIGN FLEXIBLE AND RIGID PAVEMENTS PowerPoint
The span of flexible pavement is short.
The slab action in the rigid pavement can distribute the heavy loads over the whole area and below the courses of pavement
In flexible pavement, normally a bituminous surface is used as wearing course. Pavements comparison • flexible pavement has very low modulus of elasticity (less strength). Which of the following method is used to design rigid pavement? The span of rigid pavement is long.
Civil engineer / airfield pavement.
Modulus of elasticity of rigid pavement is very high, because of high strength concrete and more load bearing capacity of the pavement itself. Difference between flexible and rigid pavements is based on the manner in which the loads are distributed to the subgrade. Design of rigid pavements is based on westergaard’s analysis, where modulus of subgrade reaction, radius of relative stiffness, radius. The initial cost of the construction is low for flexible pavements.
The initial cost of rigid pavement is high.
Flexible pavements(bituminous road) rigid pavements(cement concrete road) 1. Provide all weather access to the vehicles. Therefore, more role are playing only. Rigid pavement design is the property of its rightful owner.
The thickness of this pavement is more:
Details of these two are presented below:. There are two types of pavements based on design considerations i.e. The initial cost of the construction is high for rigid pavements. In rigid pavement, the cement concrete layer acts as a base course as well as wearing course.
In rigid pavement, load is distributed by the slab.
Flexible pavement and rigid pavement. In case of the flexible pavement the loads are deflected from grain to grain but in case of rigid pavement the deflection is not so appreciable, but the load is distributed over a large are underneath the surface course. Construction joints are essentially required. To provide a smooth and uniform rigid surface.
Flexible pavements are easy to construct and have cheaper cost than c.
C pavements and also they are easily accessible to the users. Pavement is considered failed if 20% of the surface has cracked rutting failure is due to the build up of excessive compressive strain at the top of subgrade layer pavement is considered failed if it exhibits a rut depth of 20 mm. The initial cost of flexible pavement is low: Than compared to flexible pavements.
Rigid pavement functions of pavement a multilayer system that distributes the vehicular load over a larger area as not to damage the subgrade.
The thickness of this pavement is less:
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