Design of rigid pavement by irc method

The california bearing ratio cbr value of the subgrade soil was the basis for the method of design of flexible pavements, developed originally by the california state highway department, and adopted by the road research laboratory, london, for developing their own design procedure and design charts. Highwaytransportation lec 22u4pavement design part b1 rigid pavement by bk mahawar duration. The high flexural strength is predominant and the subgrade strength does not have much importance as in case of flexible pavement. The crcp thickness design is detailed in section 2, approved design method, and section 3, rigid pavement design process for crcp. Therefore flexural strength is more often specified than compressive strength in the design of concrete mixes for pavement construction. Rajib chattaraj superintending engineer public works directorate 7th september2019 govt. Indian roads congress has specified the design procedures for flexible pavements based on cbr values. Rigid pavement empirical design example pavement interactive. Jpcp properties flexible rigid design principle empirical method based on load distribution characteristics of the components designed and analyzed by using the elastic theory. Relevant design data where obtained from dar consult and technique cone. 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. Steel reinforcement and other design details are governed by. Irc76 structural evaluation of rigid pavement of airfields. The design of rigid pavement is based on providing a structural cement concrete slab of sufficient strength to resists the loads from traffic.

Rigid pavements are designed for a period of 3040 years and thickness design of rigid pavements are influenced by traffic loading. Design flexible and rigid pavements 9 design principles. The stresses induced in concrete pavements are mainly flexural. The standard describes the procedure for structural evaluation of rigid air. G student 2professor 3assistant professor 1,2,3department of civil engineering 1,2,3samrat ashok technological institute, vidisha m. Flexible pavement design by cbr method is used to determine the total thickness of pavement. Rigid pavementrigid pavement 20 deflection is very small hence the name rigid pavement. This method is based on mechanisticempirical principles and the use of software iitrigid for the computation of flexural stresses due to single and tandem axle loads.

How to design plain jointed rigid pavements for highways with. There are many different types of empirical equations available today but this section will present the 1993 aashto guide basic design equation for rigid pavements as an example. The initial traffic in the year of completion in each direction is 150 cvpd and growth rate is 5%. Engineers must always determine the requirements of the.

The present study applied the aashto and pca method for design of rigid pavements, for both pavement types using 20 year design life and 5% annual growth rate. Types of pavement flexible pavements and rigid pavements. For mix a and b free wc ratio with crushed aggregate and required average flexural target strength of 5. Irc subjected to some maximum spacing say 140 as per irc.

The method of design allows use of conventional as well as stabilized materials in any layer of the pavement, and thickness of each layer is taken from the templates given in indian roads congress irc design code. This is an introduction to flexible pavement design for engineers. Goliya, journalinternational journal for scientific research and development, year2015. Irc 372001 guidelines for the design of flexible pavements. In order to design the length and diameter of the dowel bar we have to check its failure under the action of wheel load on the pavement slab. Design of rigid road pavement for ainachiwadi village in. Rigid pavement as per irc 582002 rigid pavements are generally used in constructing airports and major highways, such as those in the interstate highway system. Engineers are cautioned that much of pavement design is governed by codes, specifications and practices of public agencies.

For jointed concrete pavements, regardless of whether reinforced or nonreinforced, the aashtoodot method of pavement design calculates the same. The rigid pavement has rigidity and high modulus of. This method is based on limiting the concrete flexural stress under load and pavement distress caused by the erosion of the subbase andor subgrade at the joints. Introduction to flexible pavement design ced engineering. Typically there are two approaches to design the sidewalk from cbr california bearing ratio value. This is lower than specified maximum wc ratio value of 0. Pdf design of rigid pavement by irc method and its critical. The unit weight of concrete is 2400, the coefficient of friction is 1. Rigid pavement design of pavements lec14 part1 youtube.

Goliya, journalinternational journal for scientific research and development, year2015, volume3. Nov 19, 2008 highwaytransportation lec 22u4pavement design part b1 rigid pavement by bk mahawar duration. Design of flexible pavement is done as per the recommendations made in irc. Design the pavement for construction of a new two lane carriageway for design life 15 years using irc method. Pavement design two theoretical pavement types flexible pavement resists traffic loading through internal friction. Subbase thickness10 subbase modulus30,000 psi subgrade m r10,000 psi to get k. Comparative studies of flexible and rigid pavement design. A rigid pavement is constructed from cement concrete or reinforced concrete slabs. Various design parameters has been compared and the basic.

Highwaytransportation lec 22u4 pavement design part b1 rigid pavement by bk mahawar duration. Cbr system recommended by california state of highways cbr method advocated by irc. Cbr method recommended by california state of highways. Design the length and spacing of tie bars given that the pavement thickness is 20cm and width of the road is 7m with one longitudinal joint. How rigid pavements different from flexible pavements. Oldfashioned asphalt pavement thin asphalt layer over a granular base is mostly a flexible pavement. Dec 29, 2017 rigid pavement as per irc 582002 rigid pavements are generally used in constructing airports and major highways, such as those in the interstate highway system. Can use load spectra instead of esals computationally intensive. Comparative studies of flexible and rigid pavement design methods. The common design method for flexible pavement are the aashto method, asphalt institute and two layer system. Flexible pavement design by cbr procedure is utilized to determine the total thickness of pavement. Flexible pavement design given in the previous edition irc.

Sep 30, 2016 design of rigid pavement poissons ratio of concrete 0. Design charts fig 1of parti give ready to use design charts for calculations of load stress in the edge and of rigid pavement slabs for a wheel load of 30 kn. Steel reinforcement and other design details are governed by the crcp standards. Design of rigid and flexible pavements by various methods. A simple method of concrete mix design based on flexural strength for normal weight concrete mixes is described in the paper. 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. Generally there are two methods to design the pavement from cbr california bearing ratio value. An unpaved road with a compacted crushed stone course is a pure flexible pavement.

Irc 582015 guidelines for the design of plain jointed rigid pavements for highways second revision irc. In this paper a comparison of thickness design methods is being presented. Irc method of design of flexible pavements design traffic the method considers traffic in terms of the cumulative number of standard axles 8160 kg to be carried by the pavement during the design life. This lecture includes following topics design of rigid pavements what are rigid pavements. Flexural strength is more often specified than compressive strength in the design of concrete mixes for pavement construction. Westergaard considered the rigid pavement slab as a thin elastic plate resting on soil. 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. Rigid pavements csir central road research institute. Introduction to rigid pavement design ced engineering. Jun 17, 2017 this lecture includes following topics design of rigid pavements what are rigid pavements. This method is based on mechanistic empirical principles and the use of software iitrigid for the computation of flexural. This lecture includes following topics design of rigid pavements what are. Primarily implemented in the design of concrete rigid pavements on road construction.

Pavement is a structure engineered to carry vehicular loading. This method is based on mechanisticempirical principles and the use of software iitrigid for the computation of flexural. Properties of rigid pavements components of rigid pavements created by aman dembla help the. Grouted concrete roads are in the category of semirigid pavements. Section 5 rigid pavement construction standard specification for urban infrastructure works 52 edition 1, revision 0 september 2002 5.

Jointed plain concrete pavement jpcp continuously reinforced concrete pavement crcp pavement design. It is not intended as definitive treatise, and it does not encompass the design of rigid pavements. Flexible pavement design by california bearing ratio method. Pavement design with examples complete data civildigital. 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. In this article we will discuss about how to design plain jointed rigid pavements for highways by irc method. The pavement designs given in the previous edition irc. Flexible pavement aspects of basic design as per irc method. How to design plain jointed rigid pavements for highways. Design of rigid pavement by irc method and its critical. In addition, they commonly serve as heavyduty industrial floor slabs, port and harbor yard pavements, and heavyvehicle park or terminal pavements. Design of rigid pavement by irc method and its critical comparison with aashto method tanu chaturvedi1 dr.