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. Mix design methods for asphalt concrete and other hotmix types. Compared to flexible pavement, rigid pavements are placed either directly on the prepared subgrade or on a single layer of granular or stabilized material. Concrete pavement construction basics placing dowel baskets dowel bars transfer heavy loads across joints in the pavement, preventing faulting at the joint that can lead to pavement damage. Introduction to pavement design nptel may 3, 2007 granular structure wheel load p figure 19. A 2 ft gap is left between the end of the pavement and the beginning of the approach slab.
Figure 30 is a nomograph that determines the effective modulus of subgrade reaction. Scribd is the worlds largest social reading and publishing site. Design flexible and rigid pavements 9design principlespavement components and their roledesign practice for flexible and rigid pavements, ircmethods only. Engineers must always determine the requirements of the. Pdf the last century has seen an intensive process of urbanization in rural as well as metro cities.
Rigid pavement design of pavements lec14 part1 youtube. Rigid pavements have sufficient flexural strength to transmit the wheel load stresses to a wider area below. Rigid pavement empirical design example pavement interactive. On the contrary, in rigid pavements, wheel loads are transferred to subgrade soil by flexural strength of the pavement and the pavement acts like a rigid plate e. Different pavement types use different types of joints and reinforcement to control the forces acting on the concrete pavement. This lecture includes following topics design of rigid pavements what are rigid pavements. Chapter 8 pavement joints limited revisions revision 1. Jun 04, 2016 conclusion rigid pavement distress is a serious issue all over the world, the distresses causes some serious problems at wide range. Nptel syllabus transportation engineering ii video course introduction to transportation engineering 4 lectures. Engineers are cautioned that much of pavement design is governed by codes, specifications and practices of public agencies. It is not intended as definitive treatise, and it does not encompass the design of flexible pavements. A typical cross section of british roads is given in fig.
Jun 09, 2017 if you found this video helpful then please hit that like button. This page contains pavement design seminar and ppt with pdf report. Compared to flexible pavement, rigid pavements are placed either directly on the prepared subgrade or on a single layer of g ranular or stabilized. Thus he introduced an economical method of road construction. Alpha factor determination from the national airport. Lecture 36 flexible pavement design indian roads congress. In the design of a rigid pavement, the flexural strength of concrete is the major factor and not the strength of subgrade.
Guidelines for the design and construction of rigid pavements highway and transportation engineering, s k khanna and ceg justo 29. Westergaard is considered the pioneer in providing the rational treatment of the rigid pavement analysis. Compared to flexible pavement, rigid pavements are placed either directly on the prepared subgrade or on a single layer of granular or stabilized. A comparative study on rigid and flexible pavement. Sp 62 2004, guidelines for design of cc roads for rural roads. A typical cross section of the rigid pavement is shown in figure 19. In this case, the load carrying capacity is mainly due to the rigidity ad high modulus of. A newly constructed cc pavement stretch shall be opened to traffic only after a minimum curing of 28 days. Grouted concrete roads are in the category of semi rigid pavements.
Cut across the e sb cut across m r to the tl vertically meet other line read kvalue k600pci topic 10 aashto rigid pavement design figure 12. Section 5 rigid pavement construction standard specification for urban infrastructure works 55 edition 1, revision 0 september 2002 testing a testing authority shall be employed by the contractor to carry out all testing. An ideal pavement should meet the following requirements. Pavements 12 lectures cement as a pavement material analysis and design of rigid pavements design of runways, taxiways, apron, etc. The rigid pavements are made of cement concrete either plan, reinforced or prestressed concrete. Nov 17, 2008 lecture series on introduction to transportation engineering by prof.
Download pdf of pavement design note civil engineering offline reading, offline notes, free download in app, engineering class handwritten notes, exam notes, previous year questions, pdf free download. Pavement designuse of cbr method for design of flexible pavement, irc recommendation for design of rigid pavement. Lecture 38 concrete pavement design indian congress method. Then, in 1993, the guide was updated to incorporate. Introduction to flexible pavement design ced engineering. In 1986, the american association of state highway and transportation officials aashto published a comprehensive revision under the title 1986 aashto guide for the design of pavement structures. Pavement design note pdf download lecturenotes for free. Pavements and surface materials page 2 slabs and paver stone embedded in reinforced concrete are examples of rigid pavement. This is an introduction to flexible pavement design for engineers. The rigid pavements are made of portland cement concrete either plain, reinforced or prestressed concrete. In more recent years, changes in earth science curricula have resulted in a trend, at least in a good many parts of the world, in which economic geology has been sidelined. Lectures of highway engineering forth stage nov2009 rigid pavement 094 2 expansion joints. The asphalt institute in college park, maryland has issued a asphalt thickness and design, manual that suggests that asphalt thickness for roads be based on the following three factors.
Analysis and design of rigid pavements design of runways, taxiways, apron, etc. Evaluation of joint and crack load transfer khazanovich and gotlif 2002 2. Pdf a comparative study on rigid and flexible pavement. Lectures of highway engineering forth stage nov2009 09. Due to this property of pavement, when the subgrade deflects beneath the rigid pavement, the concrete slab is able to bridge over the localized failures and areas of inadequate support from subgrade because of. A typical cross section of the rigid pavement is shown in figure 3. The purpose of this appendix is only to provide a brief presentation. Rdgn042 pavement design for carriageway construction page 7 of 42 pavement type for different sections andor different lanes on the same road. Lecture note course code bce 305 veer surendra sai. Chapter 4 repair and maintenance of rigid pavenments 4.
A terminal joint figure 79 is placed where a pavement ends at a bridge or similar structure. 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. The ends of the pavement and the approach slab are placed on a sleeper slab that has been previously poured. This project discusses the implementation, use and experience of using the following items related to rapid pavement construction. Rigid pavements have su fficient flexural strength to transmit the wheel load stresses to a wider area below. This is an introduction to rigid pavement design for engineers.
Different types of joints are required like expansion and contraction. Conclusion rigid pavement distress is a serious issue all over the world, the distresses causes some serious problems at wide range. Learn for free, pay a small fee for exam and get a certificate. Prevention of rigid pavement distress is a challenge to the engineers. Civil engineering advanced transportation engineering nptel. Lecture 39 concrete pavement design pca and aashto. Sudhakar reddy, department of civil engineering, iit kharagpur. Pdf a project report on design of a flexible pavement for. Civil engineering transportation engineering i nptel. Construction of rigid pavements quality control in pavement construction. In this case, the load carrying capacity is mainly due to the rigidity ad high modulus of elasticity of the slab slab action. 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. As a general guide, factors elaborated in section 3.
Difference between flexible and rigid pavements is based on the manner in which the loads are distributed to the subgrade. View and download powerpoint presentations on rigid pavement ppt. Concrete pavement design, construction, and performance. Apr 08, 2020 ppt pavement design civil engineering ce notes edurev is made by best teachers of civil engineering ce.
Common characteristics of good and poorly performing pcc pavements khazanovich et al. Sudhakar reddy, department of civil engineering, iit kharag. It is not intended as definitive treatise, and it does not encompass the design of rigid pavements. Rigid pavement is designed and analyzed by using the elastic theory. References nptel web courses, transportation, modules irc sp 062. Nov 05, 2016 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. Section 5 rigid pavement construction standard specification for urban infrastructure works 51 edition 1, revision 0 september 2002 contents 5 rigid pavement construction 53 5. The asphalt institute in college park, maryland has issued a asphalt thickness and design, manual that suggests that asphalt. A project report on design of a flexible pavement for an existing colony. Numerous other manuals and publications already exist that provide information that is much more detailed. There are two types of pavements based on design considerations i. Find powerpoint presentations and slides using the power of, find free presentations research about rigid pavement ppt.
This pressure deformation characteristics of rigid pavement lead westergaard to the define the term radius of relative stiffness in cm is given by the equation. For critical design, a combination of load stress, frictional stress and warping stress is considered. Design of rigid pavements is based on westergaards analysis, where modulus of subgrade reaction, radius of relative stiffness, radius of wheel load distribution are used. The design of rigid pavement is based on providing a structural cement concrete slab of sufficient strength to resists the loads from traffic. Lecture note course code bce 305 transportation engineeringi under revision syllabus. Introduction to transportation engineering by prof. 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. Overview as the name implies, rigid pavements are rigid i. Ppt pavement design civil engineering ce notes edurev. Design of rigid and flexible pavements by various methods.
Department of transportation wsdot desires to improve their knowledge, awareness and retention of rapid pavement construction tools, materials and methods. Types of pavements flexible pavement rigid pavement. 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. This lecture includes following topics types of pavements. Example spring 2007 cee 320 pavement purpose load support smoothness drainage spring 2007. Practices vary from state to state, but dowel bars are typically required in eightinch or thicker pavements. The plain cement concrete slabs are expected to take up about 45kgcm2 flexural stress. The sleeper slab is finished smooth and allowed to. Types of failures in rigid pavements causes and repair. Load transfer in granular structure bituminous road. Flexible pavement are preferred over cement concrete roads as they have a great advantage that these can be strengthened.
Before we differentiate between flexible pavements and rigid pavements, it is better to first know about them. The elastic modulus based on the recoverable strain under repeated loads is called the resilient modulus m r, defined as m r. Rapid pavement construction tools, materials and methods. Lecture series on introduction to transportation engineering by prof. Maintenance and rehabilitation is to be properly done to prevent the distresses in rigid pavement. Construction of rigid pavements quality control in pavement construction comparative study of rigid versus flexible pavements modern materials in pavements. Rigid pavement free download as powerpoint presentation. Dc to richmond road in 1919 from the asphalt institute. Types of pavement flexible pavements and rigid pavements.
Rigid pavements rigid pavements have sufficient flexural strength to transmit the wheel load stresses to a wider area below. Nptel, online courses and certification, learn for free. Thickness design on flexible pavement aashto 1993 method. A rigid pavement is constructed from cement concrete or reinforced concrete slabs. Properties of rigid pavements components of rigid pavements created by aman dembla help the.
This document is highly rated by civil engineering ce students and has been viewed 362 times. The rigid pavement has a slab action and is capable of transmitting the wheel load stresses through a. It awesomely motivates me to create more videos for you. Subbase thickness10 subbase modulus30,000 psi subgrade m r10,000 psi to get k.
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