The program uses the flexible pavement design methodology in the 1993 aashto guide for design of pavement structures. Different pavement types use different types of joints and reinforcement to control the forces acting on the concrete pavement. Note these applications can perform directory traversals, can access. Design software georgia department of transportation. Providing technical support and design expertise on highway design issues related to motor vehicles, bicycles and pedestrians. As part of the development of new me design procedures, caltrans is developing a suite of dedicated software. Is there any software that we can use for flexible. 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. The caltrans procedure uses the rvalue test and aashto uses the resilient modulus test. The office of pavement engineering developed the calfp v.
Design permeable interlocking concrete pavement for pedestrian areas, parking lots, alleys and streets, the most durable and repairable permeable pavement surface. These changes will result in better calculations of pavement performance and lifecycle cost. Flexible pavement design by cbr method is used to determine the total thickness of pavement. Perpetual pavement design software the asphalt pavement alliance apa offers two versions of its software for the design and analysis of perpetual pavements. Pavement design resources flexible pavements of ohio. Realcost is a program developed by the federal highway administration fhwa and was chosen by caltrans as the official software for evaluating the long term cost effectiveness of alternative designs for new and existing pavements. The current software also includes, as reference for designers, the asphalt institute method for new pavement designs and the empirical caltrans rvalue method for both new and rehabilitation pavement designs. Simulations of pavement performance reported herein. Aashto flexible pavement design sn determination design inputs w18 6,100,000 esals applications over design period r 95 % reliability so 0. Caltrans pavement designs, and should be included in the design software. Iit pave and design of unreinforced pavement youtube. Mnpave flexible is a computer program that combines known empirical relationships with a representation of the physics and mechanics behind flexible pavement behavior.
This task is part of a larger project, begun in 1999, to help caltrans implement mechanistic empirical me procedures. Calculate the effective modulus of subgrade reaction k this calculation is a multistep process in the 1993 aashto guide for design of pavement structures. The current software newcon90 only calculates initial construction cost. Flexible pavement aashto layered analysis w nomograph. Program support the group provides technical assistance and information sharing to states and other practitioners in the field of pavement management. Cbr method recommended by california state of highways. Ce588 spring 2017 this video was produced with a swivl. The accompanying software, aashtoware pavement me design, was released in 2011. First, the subgrade upon which the pavement is placed will have a large impact on structural design. The current caltrans flexible pavement design method treats asphalt concrete as a generic material. Performs civil engineering calculations for trafficroad geometry, surveyingearthwork, pavement, concrete floors and unit c download transportation engineering software pavement calculator 2. Calculate proper pavement thickness with free online tool.
Office of asset management, pavement, and construction. Open esurvey civil tools interface click on new file menu under file menu 2. Implementation of composite pavement systems, fhwahif19014 2019. Simulations of pavement performance reported herein indicate significant differences in predicted fatigue life depending upon asphalt concrete mix. Washington state i90 pavement rehabilitation using precast concrete pavement, fhwahif19026 2019. For pavements with design life greater than 20 years, the following enhancements shall be incorporated into all flexible pavements. This technical memorandum describes a design of a sample catalog for rigid pavement as requested by the caltrans division of design in 2005. Thanks to advances in the pavement field it has reached the first version of the software calme.
But the design methodology has taken rapid strides towards rationality in the past few decades based on an understanding of the stresses and strains in the layers constituting the pavement and application of the concept of reliability in achieving the desired level of service during the pavements design life. Important formulas used to design flexible pavements created by aman dembla help the. Developing a rehabilitation design generally requires extensive investigation into the condition of the existing pavement structure, performance history, and laboratory testing of materials to establish suitability of existing and proposed materials for use in the. By default, the tool uses a layer coefficient a of 0. These programs will support engineers in the state in designing new and rehabilitating existing flexible and rigid pavements. This paper describes the process of developing an effective flexible pavement design system, based on the authors experience from development of the flexible pavement design system known as. Jun 09, 2017 lecture 36 flexible pavement design indian roads congress duration. Climate region map for pavements pdf moisture sensitivity risk map pdf california test methods. Caltrans developed the calme software and postulates that its models. Secondly, to assist the pavement engineer with the crcp design process using the aashto pavement me design software, this technical summary describes the main crcp design inputs and identifies the most sensitive design inputs and features. But the design methodology has taken rapid strides towards rationality in the past few decades based on an understanding of the stresses and strains in the layers constituting the pavement and application of the concept of reliability in achieving the desired level of service during the pavement s design life. In 1996, california department of transportation caltrans initiated an extensive project to develop mechanisticempirical me pavement design and analysis tools, which will help state design engineers incorporate the impact of new products and technologies, increased traffic volumes. This design manual addresses methods to properly develop a rehabilitation project, pavement milling, and the computations necessary for the pavement design process.
Similarly, lifecycle cost calculations are required for most caltrans pavement designs, and should be included in the design software. Sample rigid pavement design tables based on version 0. Flexible pavement design by california bearing ratio method. Caltrans has developed lifecycle cost analysis procedure manual to provide stepbystep instructions on how to use realcost on state highway system projects. This project will consist of the construction of a new flexible pavement to extend route 123 to intersect with route i80 in north jersey.
A computer program known as calme has been developed for analysis and design of new flexible pavements and rehabilitation of existing pavements. Aashto pavement thickness design guide when designing pavement thickness for flexible and rigid pavements, the following considerations should be used. Minimum design standards are based on recommendations of caltrans, aashto. The california department of transportation caltrans has funded the development of design models for flexible pavements and for overlays that have been incorporated in the software currently known as calme. Pavement design manual montana department of transportation. May 02, 2017 ce588 spring 2017 this video was produced with a swivl. Pervious pavement is designed primarily to promote stormwater infiltration and improve the quality of stormwater runoff. For flexible pavement designs, fps19w texas flexible pavement design system windows or aashto design procedure, darwin 3. The user provides soil subgrade and drainage information, anticipated traffic loads as 18,000 lb 80 kn axle loads up to 10 million, and the base material type. Software programs interlocking concrete pavement institute.
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. Calme is a me design program for flexible pavements that parallels the nchrp 7a mepdg and is calibrated for california conditions. Go to the main menu and click on the pavement design option 4. The pavexpress scoping tool is a simplified pavement design tool to help engineers and pavement decisionmakers analyze pavement structures and create technically sound structural designs. In 2010, adot contracted with applied research associates, inc. Pdf software development pakpave for flexible pavement design.
Webniar recorded may 30, 2017 discussing perpetual pavement design and introducing version 4. Before implementing the mechanistic empirical pavement design guide mepdg software from the nchrp 7a project, caltrans has adopted a threestep process for evaluating it including. New flexible pavement design example 1993 aashto pavement. An example of the graphic display of feasible pavement designs available within fps 19. Caltrans is developing a suite of dedicated software. Performs civil engineering calculations for trafficroad geometry, surveyingearthwork, pavement, concrete floors and unit conversions. Pavexpress, a webbased pavement scoping tool that simplifies the design of flexible and rigid pavements, is also based on aashto 93. Pavement calculator pavement design calculator software. The input parameters for the baseline design using the 1993 aashto flexible procedure for new pavements are summarized in table 62.
Caltrans mechanisticempirical pavement design process with new. Webbased calacweb and calfpweb for flexible pavement thickness design. Characterizing existing hotmix asphalt layer damage for mechanistic pavement rehabilitation design fhwaproj140126. Aashto pavement design spreadsheets buckholz traffic. Establishing flexibility in caltrans highway design standards and procedures, especially in the context of urban environments and multimodel design. Rigid pavement empirical design example pavement interactive. Design using the aashtoware pavement me design procedure publication no. The california department of transportation caltrans has funded the development of design models for flexible pavements and for overlays that have been incorporated in the software. Iit pave and design of unreinforced pavement axe consultants. When designing pavements both mix design and structural design, there are three fundamental external design parameters to consider.
Software includes input errortrapping for learners. The baseline flexible pavement design is a threelayer system consisting of an asphalt concrete ac surface layer over a nonstabilized graded aggregate base gab layer over subgrade sg. Caltrans has developed lifecycle cost analysis procedure manual to provide stepbystep instructions on how to use realcost on state highway system projects regardless of funding source. Windowsbased flexible pavement design tools for txdot. It was developed by pavia systems, with generous sponsorship from the napa, the apa, and a consortium of state asphalt pavement associations. The highway design manual hdm establishes uniform policies and procedures to carry out the state. What is the computer program that i can use for flexible pavement design. Mnpave flexible minnesota department of transportation. Current activities include demonstration project 108a on multiyear prioritization, demonstration project 108b on engineering applications of pavement management data, and updating the pavement. The mechanistic portions of the program rely on finding the tensile strain at the bottom of the asphalt layer, the compressive strain at the top of the subgrade, and the maximum principal stress in the middle of the. Cbr method for flexible pavement design part 2 duration. Calme, a mechanisticempirical program to analyze and design. Is there any software that we can use for flexible pavement design calculations.
Use the procedures for fulldepth hma to determine the minimum thickness for flexible pavement. Generally there are two methods to design the pavement from cbr california bearing ratio value. It is typically designed to capture rainfall on the pavement surface area, but may also accept runon from adjacent impervious areas and other hardscapes sidewalks, rooftops, or gutters. The mechanistic portions of the program rely on finding the tensile strain at the bottom of the asphalt layer, the compressive strain at the top of the subgrade, and the maximum.
Mechanisticempirical pavement design guide flexible pavement models did not fully meet these criteria. Streetpave 12 is the latest in jointed plain concrete pavement thickness design. Introduction to flexible pavement design ced engineering. Traffic engineering division, preliminary engineering division, and final design division refer to the cadd support page if you have questions pertaining to cadd computer aided drafting and design standards and configurations or require access to files used in roadway plan production, special detail drawings, traffic control details. Windowsbased flexible pavement design tools for txdot figure 1. Improving flexible pavement design procedures author. The design procedures are based on different material properties determined in the laboratory. Calme also includes these major features, which are not included in the nchrp 7a mechanistic empirical pavement design guide.
New flexible pavement design example 1993 aashto pavement design project name and location. Pavement design free pavement design software download. A that will assist in determining the appropriate structural pavement design methodology, pavement type, and design. Click on the settings button in the pavement design window, the settings window will appear. Design of pavements has been based on experience and judgment in the past. Pavement me design software hereinafter pavement me design for crcp. In 1991 aashto released a pavement design software package entitled design analysis and rehabilitation for windows darwin. Explaining the components of flexible pavement next lecture. Many perpetual pavements have been built over the years. Calback contains specific features pertinent to california and is designed to work standalone, or in concert with the flexible pavement design and analysis software calme.
A new version of darwin was released in 1993 along with a revised edition of aashto. The design of thickness of the flexible pavement has taken the backbone place in determining the overall performance and providing high level of serviceability of the pavement structure for the. Total esal calculator american concrete pavement association. Calback is a software developed by caltrans ucprc to backcalculate layer moduli of flexible and rigid pavements using fwd deflection data collected from existing pavements. Design of flexible pavement using aashto method duration. Refer to hdm topic 633 for new design procedures and hdm topic 635 for rehabilitation design procedures. The main purpose of the project is to improve the ability of caltrans pavement designers to use mechanisticempirical me pavement design procedures that were developed and calibrated for california conditions as part of partnered pavement research center strategic plan element pprc spe 4.
Stand alone software version of the pavement design portion of the ce calc website. Flexible pavement design using mechanisticempirical methods. Enhancing caltrans mechanisticempirical pavement design process with new backcalculation software. It should also be noted that in 2008, aashto released the mechanisticempirical pavement design guide. American or metric versions include an extensive documentation and help library, as well as onscreen, mouseover advice. The ultimate goal of caltrans is that calme or its. Pdf calme, a mechanisticempirical program to analyze.
Nov 10, 2014 pavexpress, a webbased pavement scoping tool that simplifies the design of flexible and rigid pavements, is also based on aashto 93. Mndot flexible pavement design, rvalue method excel, 0. Calfpweb updated 040219 calfpweb is a program to design new pavement alternatives for flexible pavements. Supplemental asphalt lab procedures lp series performance grade pg asphalt binder info.
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