Rigid Pavement. Near the end of a rigid pavement's service life, a decision must be made to either fully reconstruct the worn pavement, or construct an overlay layer. Considering an overlay can be constructed on a rigid pavement that has not reached the end of its service life, it is often more economically attractive to apply overlay layers more frequently. This type of pavement is cable to transfer wheel load to a wider area as it has good flexural strength. A Rigid pavement is a pavement consisting of a relatively thin slab of Portland cement concrete overlying a sub-grade or base-course or a regulating layer. Prof. Satish Chandra, Ph. 4- Load transfer is done by slab action. 2- Rigid pavement has a concrete layer at the top, the base course and soil subgrade are under it. DESIGN OF RIGIDDESIGN OF RIGID PAVEMENTSPAVEMENTS PART- IPART- I 2. Highway Pavement: Layers, Functions, Types, Defects, Rigid and Flexible Pavements! In simple terms, a flexible pavement can be defined as a pavement layer comprising of a mixture of aggregates and bitumen, heated and mixed properly and then laid and compacted on a bed of granular layer. Flexible Pavement versus Rigid Pavement Prof. Satish Chandra , Ph.

In rigid pavement, there are not many layers of materials as in the case of the flexible pavement.

The pressures aren’t transferred from grain with the lower layers, as in the ease of flexible pavement layers. COMPONENTS OF ROAD G.L SUBGRADE EMBANKMENT PAVEMENT SHOULDERCARRIAGEWAY ROAD WAY 3. Rigid pavement; Flexible pavement: Are those pavements which reflect the deformation of subgrade and the subsequent layers to the surface.
In the design of a rigid pavement, the flexural strength of concrete is the major factor and not the strength of subgrade. 2. Elastic layered theory can’t be applied for jointed rigid pavements due to the fact that one of the assumptions of the layered theory was that layers are infinitely long in horizontal direction ( no effect of discontinuity at joints). • The rigid pavements are made with Portland cement concrete-either plain, reinforced or prestressed concrete the plain cement concrete slabs are expected to take-up roughly 40 kg/sq.
To solve this problem Westergaard (1925) assumed that a rigid pavement could be considered as a slab

D. Director, CSIR-Central Road Research Institute, Delhi In simple terms, a flexible pavement can be defined as a pavement layer comprising of a mixture of aggregates and bitumen, heated and mixed properly and then laid and compacted on a bed of granular layer. There’s no grain to grain load transferring, which essentially means that the top layer of concrete absorbs most of the pressure and … 1. The loads will distribute to natural soil layer through different layers of rigid pavement. 3- Rigid pavement can distribute the load over a wide area because of its high flexural strength.

Use the 1993 AASHTO Empirical Equation Using the previously calculated ESAL results and the 1993 AASHTO empirical rigid pavement design equation the following pavement thickness designs can be calculated: HMA pavements are flexible pavements. It supports the applied … Rigid pavement: The rigid characteristic of the pavement are associated with rigidity or flexural strength or slab action so the load is distributed over a wide area of subgrade soil. In rigid directly placed on a well-compacted subgrade or on a single layer of granular or stabilized material. It is placed on a Sub grade 3.

Pavement design, in general, consists of determining the thickness of the pavement or of the several layers of which it is composed in order to resist the wheel loads of the traffic and transmit them safely on to …