Rigid pavement design example

Design a new rigid pavement for a major interstate highway using the following conditions four lanes each direction. Design methods ability to consider factors that affect rigid pavements. Westergaard method for rigid pavement design spreadsheet. Different pavement types use different types of joints and reinforcement to control the forces acting on the concrete pavement.

Proper design and construction are absolutely necessary if the pavement is to perform. Design, analysis, and rehabilitation for windows is a computerized pavement design tool based on the aashto 1993 design guide of pavement structures. Rigid pavement analysis and design fhwa us department of. Design a new flexible pavement for a major interstate highway using the following conditions four lanes each direction. Design of rigid pavement using aashto method youtube. Rigid pavement design aashto road surface youngs modulus. Defined regular use for pavement design as at least 250 annual departures, which is equivalent to 500 annual operations.

In this video, you will know how to design a rigid pavement using aashto method and curves to make you available to develop structure pavement. Date 2019 rigid pavement design manual rpdm 110118 2018 rigid pavement design manual rpdm. As a general guide, factors elaborated in section 3. Which is defined as the pressure per unit deflection of the foundations as determined by plate load test the modulus of subgrade reaction k is used as a primary input for rigid pavement design. 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. Poor subgradesubbase preparation can not be overcome with thickness. Jointed plain concrete pavement jpcp continuously reinforced concrete pavement crcp pavement design.

Westergaard considered the rigid pavement slab as a thin elastic plate resting on soil. This test method should not be used if the soil contains particles that are easily broken under the blow of the tamper unless the field method of compaction will. Grouted concrete roads are in the category of semirigid pavements. Rigid pavement design example proposed revision to aashto guide appendix 1 a jointed concrete pavement is to be designed to carry 10 million esals and the pavement is located in the southeastern united states. Newly added with this version is jointed plain concrete overlay designs for all six types bonded on ashpalt, unbonded on asphalt, bonded on concrete, unbonded on concrete, bonded on composite, unbonded on compsosite. It clarifies when state pavement design procedures may be used and when pavementtransportation computer assisted structural engineering pcase is required. For help on the use of this excel tool, you can download its instruction text file.

January 2005 implementation memo flexible pavement design manual. Called rigid since pccs high modulus of elasticity does not allow them to flex appreciably. This pressure deformation characteristics of rigid pavement lead westergaard to the define the term radius of relative stiffness l in cm is given by the equation 1. Rigid pavement is designed and analyzed by using the elastic theory.

The westergaard method for rigid pavement design involves a calculation of the stresses acting in the pavement under the wheel load. This revision provides pavement design procedures and requirements for the pavement design of roads and parking areas worldwide. Design size and spacing of dowel bars at an expansion joint of concrete pavement of thickness 25 cm. Joints in rigid pavement transportation engineering. This is an introduction to flexible pavement design for engineers. Rdgn042 pavement design for carriageway construction page 7 of 42 pavement type for different sections andor different lanes on the same road. Ufc 325001 pavement design for roads and parking areas.

Introduction to rigid pavement design ced engineering. It estimates the support of the layers below a rigid pavement surface course the pcc slab. Properties of rigid pavements components of rigid pavements created by aman dembla help the. Included all pavement design in chapter 3, including previous guidance on pavement design for airplanes weighing less than 30,000 pounds 610 kg. Graph example output rutting total ac base subgrade verify against design criterion specified by agency. Engineers must always determine the requirements of the. Truck distribution for multiplelane controlledaccess. It is not intended as definitive treatise, and it does not encompass the design of rigid pavements. Types of pavements flexible pavement rigid pavement. An introduction to rigid pavement design a pdh online. 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. Subbase thickness10 subbase modulus30,000 psi subgrade m r10,000 psi to get k.

Ac 15053206f, airport pavement design and evaluations. The course will give you the basic terminology and technical considerations needed to help you address rigid pavement design issues on specific projects. There are three basic types of rigid pavement commonly used worldwide. Rigid pavement design term paper example topics and well. Rigid pavement design of pavements lec14 part1 youtube. The design of rigid pavements by the westergaard method is still commonly used today for rigid pavements loaded by nonhighway vehicles. 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 rigid pavement has rigidity and high modulus of. Load capacity of the dowel system is 40 percent of design wheel load. The purpose of the expansion joint is to allow expansion of concrete during rising in temperature with respect to construction temperature. Can use load spectra instead of esals computationally intensive. Design, types, flexible and rigid pavement, notes and functions. Streetpave 12 is the latest in jointed plain concrete pavement thickness design.

Any concrete pavement, built of any thickness, will have problems on a poorly designed and constructed subgrade or subbase. Example design size and spacing of dowel bars at an expansion joint of concrete pavement of thickness 25 cm. Rigid pavements are designed for a period of 3040 years and thickness design of rigid pavements are influenced by traffic loading. In simple applications on real projects the information provided will give designers a good start in addressing subgrades, select materials and subbase courses, base courses and pavement design for rigid pavements for streets, roads and parking. For jointed concrete pavements, regardless of whether reinforced or nonreinforced, the aashtoodot method of pavement design calculates the same. General design inputs design reliability 90 percent overall standard deviation, so 0. 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. Flexible pavement empirical design example pavement. By looking at several different design periods and reliability levels this example gives an idea of the relative influence of these inputs. They are provided along with longitudinal directions.

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. Subbase thickness10 subbase modulus30,000 psi subgrade mr10,000 psi. Ufc design method calculate the maximum length of steel reinforced rigidconcrete pavement. In this video, you will know how to design a rigid pavement using aashto method and curves to make you available to develop structure. A rigid pavement is constructed from cement concrete or reinforced concrete slabs. In simple applications on real projects the information provided will give designers a good start in addressing subgrades, select materials and subbase courses, base courses and pavement design. Types of pavement flexible pavements and rigid pavements. 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. The chosen design has 6 inches of sandmix asphalt wearing surface, 9 inches of soilcement base, and 10 inches of crushed stone subbase. This lecture includes following topics design of rigid pavements what are rigid pavements. 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. The thickness design of cpcd is detailed in section 2, approved design method, and section 4, rigid pavement. This course is intended for engineers, architects and construction professionals who want an introduction to rigid pavement design for streets, roads and parking areas. April 27, 2009 mndot pavement design examples example no.

Ufc design method calculate the frost penetration depth for flexible and rigidconcrete pavement. The layer directly under the pcc is more flexible than the concrete, but still quite rigid. Calculate the design base thickness required and subgrade frost penetration for flexible and. Pavement design is governed by a number of considerationsfactors, as given below. A surface layer, made up of slabs of portland cement concrete pcc, sits on top of a handful of sublayers.

It is a basic treatment that will introduce designers to some important principles and terminology. Design size and spacing of dowel bars at an expansion joint of. Design period or design life of a pavement is the period of time for which the initially. Engineers are cautioned that much of pavement design is governed by codes, specifications and practices of public agencies.

Work can be verified by using the flexible pavement structural design utility. The rigid pavements are made of cement concrete either plan, reinforced or prestressed concrete. Pcapav for damage analysis of pcc pavements based on the pca design method. The design of rigid pavement is based on providing a structural cement concrete slab of sufficient strength to resists the loads from traffic.