Types of rigid pavements pdf

Critical condition of stress in the rigid pavement is the maximum flexural stress occurring in the slab due to wheel load and the temperature changes. Type of joints design of rigid pavements lec14 part2. Types of failures in flexible pavements daily civil. Justo, i created this post, which covers the failures in rigid pavements. Types of pavements flexible pavement rigid pavement. The different types of failures in flexible pavements are described below.

Composite pavements 12th annual mn pavement conf 14 feb 2008 the structural and functional performance of these two types of composite pavements is not well understood or documented. Types of pavements flexible pavements and rigid pavements. Bases and subbases for concrete pavements aashto classification a6 or a7 soil groups or the unified soil classification system ch, mh, and oh soils. Because of its relative rigidity, the pavement structure distributes loads over a wide area with only one, or at most two, structural layers fig 1. Classes on the manual are available on request by the district pavement design engineer. Appendix a pavement distress types and causes this appendix provides descriptions of the types and causes of the distresses that occur in asphalt, concrete, and asphaltoverlaid concrete pavements, and asphalt and concrete shoulders. This lecture includes following topics why joints are provided in rigid pavements. This chapter includes guidance on the design and placement of pavement joints for rigid and flexible pavements. Flexible pavements will transmit wheel load stresses to the lower layers by graintograin transfer through the points of contact among the granular structure see. D ifferent types of pavements may be adopted relying upon the traffic needs. Base surface course subbase subgrade pavement flexible pavement rigid. Unless otherwise indicated, all joints are placed perpendicular to the grade.

Cement shall be type gp portland cement complying with as 3972. Topic 621 types of rigid pavements pavement website. The two prime factors responsible for rigid pavement failure are poor quality of material consist of following items 1. 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. When submitting details of the nominated mix in accordance with clause 5. Types of pavements there are two types of pavements based on design considerations i. Address various data quality management procedures. The causes and types of failure of pavements, particularly of rigid pavements should be understood in order to initiate proper repair and rehabilitation programme to increase their service life.

Difference between flexible and rigid pavements is based on the manner in which the. Transverse random cracks are expected in the slab, usually at 3 to foot intervals see 7 figure 621. Other factors responsible for non uniform foundation include variability due to a number of reasons including, natural causes, excavation and. Pavement design zintroduction ztraffic load analysis zpaving materials zflexible pavement design zrigid pavement design 6. Rigid pavement is designed and analyzed by using the elastic theory. Joints in rigid pavement transportation engineering. The strength of a flexible pavement is a result of building up thick layers and thereby distributing the load over the sub grade. A project description form pdf was prepared for state agencies interested in. Besides, rigid pavements in spite of their high initial cost, are proven to be more economic than flexible type pavements when due considerations are made to life cycle cost and all types of. Section 5 rigid pavement construction standard specification for urban infrastructure works 54 edition 1, revision 0 september 2002 as 79 the specification and manufacture of concrete. If you have the book, please consult the book, because that would be a better option. Director, csircentral road research institute, delhi two types of pavements are laid in india rigid pavement and flexible pavement. Models for predicting the performance of these pavement systems need to be developed for use in design, pavement management, and lifecycle cost analysis. Jointed plain concrete pavement jpcp, jointed reinforced concrete pavement jrcp, continuous reinforced concrete pavement crcp, and.

Rigid pavements are also suitable for areas with shallow water table. Pavement type determinations should include an economic analysis based on life cycle costs of the pavement type. Excessive deformation in subgrade soil of a flexible failure is called subgrade failure. Paul guyer is a registered civil engineer, mechanical engineer, fire protection engineer, and architect with over 35 years experience in the design of buildings and related. Types of rigid pavements concrete pavements commonly referred to as rigid pavements are and efficient and sometimes the best solution for particular areas like areas having high moisture content and excess water from subsurface as well as surface sources. This paper presents the results of pavement plateau dimensioning, designed for traffic of heavy vehicles dump trucks exclusively with a. Improper design of pavements leads to early failure of pavements affecting the riding quality.

Volume 6 supplementary model drawings download pdf 2. Two types of pavements are generally recognized as serving this purpose, namely flexible pavements and rigid pavements. Cracking is the most common feature of the rigid pavement. Design period or design life of a pavement is the period of time for which the initially. Many of the photos used in this appendix are from the ltppdistress identification manual. There are many types of joints used in the construction of concrete pavements but they all control the movement of the pavement and the associated cracking andor differential settlement. Are those pavements which reflect the deformation of subgrade and the subsequent layers to the surface. This chapter gives an overview of pavement types, layers, and their functions, and pavement failures. To solve this problem westergaard 1925 assumed that a rigid pavement could be considered as a slab. What are the advantages and disadvantages of pavements.

Types of joints in rigid pavement pdf highway pavement layers functions types defects rigid. Longitudinal joints are required when pavement width is more than 4. Pavement design is governed by a number of considerationsfactors, as given below. Pdf this study presents a comparison the strength of rigid pavement using different five base courses. 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. With the reference of the book titled as highway engineering, by s. Different type of joints explaining all the joints in rigid pavements longitudinal joint transverse joint.

Chapter 8 pavement joints limited revisions revision 1. The repair and restoration of rigid pavement depends on the type of distress. Different types of joints are required like expansion and. Bitumen is derived from petroleum crude, which is in short supply globally and the price of which has been rising steeply. Westergaard considered the rigid pavement slab as a thin elastic plate. Rigid pavements, though costly in initial investment, are cheap in long run because of low maintenance costs. Layers, functions, types, defects, rigid and flexible pavements. Failure of rigid pavement failure in rigid pavement or cement concrete pavement can be identified by formation of cracks on the pavement surface. Historical developments rigid pavements contrary to flexible pavements, rigid pavements were designed from the beginning using analytical solutions flexural stress in concrete has long been considered as a major, or even the only design factor analytical solutions goldbecks 1919 formula. Elastic layered theory cant 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. There are various types of joints in concrete pavement, e. Across longitudinal joints, tie bars are provided these are the main types of joints in the rigid pavement. Show full abstract hypothesis and study of relationship between types of lanes, total no. Design, types, flexible and rigid pavement, notes and functions.

Rigid pavement july 2014 page b1 chapter b table of contents b. This page contains pavement design seminar and ppt with pdf report. Rigid pavementrigid pavement 21 rigid pavements, though costly in initial investment, are cheap in long run because of low maintenance costs, the cost of construction of single lane rigid pavement varies from 35 to 50 lakhs per km in plain area, rigid pavement have deformation in the sub grade is not transferred to subsequent layers. Adequate coefficient of friction to prevent skidding of vehicles, impervious surface, so that subgrade soil is well protected, and long design life with low maintenance cost. Joints in cc pavements joints are the discontinuities in the concrete pavement slab, and help to release stresses due to temperature variation, subgrade moisture variation, shrinkage of concrete etc.

The second chapter sheds light on the three main aspects of pavement condition surveys. Pdf a comparative study on rigid and flexible pavement. Rigid pavements can be constructed with contraction joints or no joints, with dowels or without dowels, and with. Pdf the influence of base course types on rigid pavement. Identify types of condition rating systems and the variables and factors affecting performance. Rigid pavement analysis and design fhwa us department of. Types of pavement flexible pavements and rigid pavements. An ideal pavement should meet the following requirements. There are various merits in the use of rigid pavements concrete pavements are summarized below.