Concrete mixture proportioner iphone concrete mixture proportioner ipad. Calback is a sophisticated backcalculation program that contains specific features pertinent to california and is designed to work standalone, or in concert with calme. Calback is a unique and important addition to the existing knowledge base in that it possesses multiple data inputoutput methods, several new analytical modeling methods, and numerous user performance options. The tonn program may be downloaded from the pavement design software webpage. The following chapters in this ac present an overview of the ndt data collection process and equipment that are used to collect the field data. Daps deflection analysis of pavement structures is a rapid, accurate and reliable method for performing backcalculation of deflection results. Cloudbased pavement design software rubicon toolbox is a suite of tools that can greatly increase the productivity of engineers involved with pavement rehabilitation design. Layered elastic analysis for flexible and rigid pavements. The software is capable of calculating aircraft classifications numbers in accordance with the. Pavement calculator pavement design calculator software. Software and spreadsheets for airfield design chet aero.
Evaluation of rehabilitation fixes final report michigan department of transportation office of research administration 8885 ricks road lansing mi 48909 by neeraj buch, karim chatti, syed w. Abatechs software for back analysis of fwd deflection data collected from various types of falling weight deflectometers. Kgpback, is a specific version of backga program developed by the transportation. A study by nazzal and mohammad 2010 for the louisiana department of transportation and development also concluded that the m r values were significantly affected by the back calculation method, and shift factors should be developed. To alleviate this limitation, this paper focuses on the recent development of a systematic back calculation protocol for subgrade resilient modulus using modcomp6 software.
The back analysis algorithm solves for both a two layer elastic system and the thickness of subgrade, or a three layer elastic system and the thickness of subgrade. Available software include faarfield, comfaa, compsys, and other programs. The pcn module is used to rate the strength of airport pavements based on results from the elmod backcalculation procedure. Design three types of highways, all main roads but with different traffic loads. It is easy to move from one to the other and simply repeat the calculation. Ability to switch application interface between english and metric. This lecture includes following topics contact pressure rigidity factor equivalent single wheel load repetitions of loads n vehicle damaging factor f factors affecting the thickness of. The second component included formalising the pavement layer moduli back calculation algorithm for use in mechanistic empirical pavement treatment design. The following table lists free txdot and fhwa engineering software to assist in highway design.
Advanced tools such as monte carlo simulation and finite elements can enhance the depth and scope of pavement analysis and design calculations. Using falling weight deflectometer data with mechanisticempirical design. Deflection back calculation and pavement design software. The equivalent load most commonly used in pavement design in the u.
One of the more common methods for analysis of deflection data is to back calculate the elastic properties for each layer and provide the elastic layer modulus that are typically used for pavement evaluation and rehabilitation design. Performs civil engineering calculations for trafficroad geometry, surveyingearthwork, pavement, concrete floors and unit conversions. It calculates pavement responses stresses, strains, and deflections. A simplified pavement design tool county engineersmd. Sharing knowledge on pavement design and evaluation is central to our philosophy. Bituminous testing spreadsheet version 2, xlsm 400 kb if you have data in a version 1 spreadsheet and would like it updated to version 2, contact bruce. Pavement design overlay design reconstruction pavement design module of esurvey civil tools helps you to compute the thickness of various pavement compositions in both overlay design projects and reconstruction projects. Deflection analysis of pavement structures for fwd data. Can someone suggest the software for back calculation of falling weight deflectometer observations. These analysis methods referred to as backcalculation programs provide the elastic layer modulus typically used for pavement evaluation and rehabilitation design. Alizelcpc software for pavement structures analysis and design, roads, airfield pavements, port and logistic platforms, new projects, rehabilitation, deflexions analysis.
Roots date back to the 1960s pca method tailored for streets and roads. Software tools and solutions to design concrete pavements wcpa 2017 annual concrete pavement workshop february 15 17, 2017 eric ferrebee technical services engineer american concrete pavement association 2017 wcpa annual concrete pavement workshop wisconsin concrete pavement association february 16, 2017. Itech provides well established courses in pavement structural design for a good use of alize software. Please see the aashto 1993 pavement design guide for guidance on rehabilitation design as well as calculations for esals. Can someone suggest the software for back calculation of falling.
Integrating threedimensional road design and pavement. Rc1594 preparation for implementation of the mechanistic. Backcalculation is a mechanistic evaluation of pavement surface deflection basins generated by various pavement deflection devices. The goal of the mechanisticempirical pavement design guide mepdg is to identify the physical causes of stresses in pavement structures and calibrate them with observed pavement performance. Campus students are required to use it for their design activities. The structural condition of inservice airfield pavements, either remaining life or strength of the pavement is deduced from the fwd response, inducing a test load which allows to model a pavement. Software and spreadsheets for airfield design chet aero marine. Systematic backcalculation protocol and prediction of. The difference between the number of wheels in the wing and body gears of the a380 is accommodated by treating the aircraft as two different aircraft in the design mix. It is built upon the nchrp mechanisticempirical pavement design guide.
In some backcalculation programs, a range minimum and maximum of moduli are selected or calculated to prevent program convergence to unreasonable. The design procedure for rigid pavement design is unchanged from that in ledfaa 1. Software tools and solutions to design concrete pavements. Backcalculation generates backcalculation inputs from falling weight deflectometer fwd files to the software for rehabilitation design. It reflects a change in the methods and procedures engineers use to design pavement structures by taking advantage of the advances in material mechanics, axleload spectra and climate data for predicting pavement performance. Please note that the structural coefficient of the base layer 0. Backcalculation of layer parameters for ltpp test sections. In this help, the complete procedure is explained in the following 5 topics. Engineering software is currently unavailable for download using internet explorer. Can someone suggest the software for back calculation of. Utilizing the latest research provided by the heavy vehicle simulator and based on 35 years of worldwide consultancy experience, elmod is unparalleled at modeling pavement.
Ability to process a file in a batch mode can process any number of deflection records at a time exports batch calculation results into. Modarresprecision of back calculation analysis and independent parametersbased models in estimating the pavement layers modulus. This design bulletin provides a number of updated requirements to the pavement design manual 1997 which can be broadly grouped into categories of agency practices, design inputs, and design report contents. Aashtoware pavement me design is the next generation of pavement design software. However, files generated from the equipment can be applied in any other back calculation program. Revit is referred to as a dominate bim software developed by autodesk. Design software georgia department of transportation. Some of these include procedures written under the shrp program astm d5858 and the one documented in report fhward97076, design pamphlet for the back calculation of pavement layer moduli in support of the 1993 aashto guide for the design of pavement structures. Back calculating pavement structures fwd deflection survey.
The structural condition of inservice airfield pavements, either remaining life or strength of the pavement is deduced from the fwd response, inducing a test load. With this objective in mind, the process by which shrp pursued the selextion and development of a backcalculation procedure. Pavement modeling is based on roughness, friction, pavement distress, as well as the structural analysis. Mechanisticallybased pavement thickness design methods are even more complicated to use and have, to date, required sophisticated computer software and more. Both of these packages are built for pavement design only. A free, online tool to help you create simplified pavement designs using key engineering inputs, based on the aashto 1993 and 1998 supplement pavement design process. Net environment runs under windows xp, vista and win 7 2. Engineering software texas department of transportation.
It reflects a change in the methods and procedures engineers use to design pavement structures by taking advantage of the advances in material mechanics, axleload spectra and climate data for. If you know of a design tool thickness design software, stressdeflection analysis software, etc. Design tools if you know of a design tool thickness design software, stressdeflection analysis software, etc. Enhancing caltrans mechanisticempirical pavement design process with new back calculation software. In structural design the stresses due traffic loading and temperature are estimated, and the thickness of the pavement. Calculation of revised thicknesses based on the kgp back software results. One of the more common methods for analysis of deflection data is to backcalculate the elastic properties for each layer in the pavement structure and foundation. It took a certain level of training to properly use the nomographs and other tools necessary to make the calculations. After a 10year research and development effort, the federal aviation administration faa is set to debut a new software package for airport pavement thickness design. The back calculated moduli are used for the analysis of the existing pavement section and to assess the structural condition of the pavement. Bakfaa is the faa software to perform backcalculation of pavement material properties using heavy weight deflectometerfalling weight deflectometer hwdfwd data.
We are working to resolve the issue as quickly as possible. Pavement thickness design evolves with latest software. Bakfaa computer program for backcalculation of airport pavement properties we have the current version in both the full binary and setup programs. The rosy design, a back calculation software for both road andor airport data analysis. The lcca module allows the user to compare multiple rehabilitation scenarios over a 2025 year period. Rubicon toolbox is a suite of tools that can greatly increase the productivity of engineers involved with pavement rehabilitation design. The manufacturers of fwds can supply own backcalculation softwares. The new program is called faa rigid and flexible iterative elastic layered design, but is known by its acronym, faarfield. Publications pavements federal highway administration.
Flexible pavement evaluation by falling weight deflectometer. Many backcalculation software programs use this general approach, matching. 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. The software is written using modern windows programming languages with this version being developed for the windows 98 operating system. The back calculation software paveback was developed by geotran for back calculation of. Performs civil engineering calculations for trafficroad geometry, surveyingearthwork, pavement, concrete floors and unit c download transportation engineering software pavement calculator 2. Accessible via the web and mobile devices free no cost to use based on aashto pavement design equations userfriendly share, save, and print project designs. Pavement designanalysis software university of idaho. Index backcalculation of layer parameters for ltpp test. Agi32 allows you to select from two calculation techniques when simulating a lighting application. Airport design software supports pavement design and pay reductions for airport pavement projects.
Haider, gilbert baladi, wouter brink, and iman harsini. Stand alone software version of the pavement design portion of the ce calc website. Pavia systems, with sponsorship from the asphalt pavement alliance apa and its constituent members, has developed free online pavement thickness design software called pavexpress. Highway design manual november 2014 appendix 71 1 flexible pavement analysis the aashto chart 4002 7 following the example in this appendix is for a flexible pavement. This is a proprietary aashtoware computer software product. These two elements define this approach to pavement design. Enhancing caltrans mechanisticempirical pavement design process with new backcalculation software. Calculation of design traffic for new pavement and overlay design. Falling weight deflectometer fwd mndot pavement design. Pavement interactive was developed by the pavement tools consortium, a partnership between several state dots, the fhwa, and the university of washington, as part of their effort to further develop and use computerbased pavement tools. Net application compatible with all existing versions of. Bakfaa performs back calculation of pavement layer modulus values using the faa layered elastic analysis program leaf and a downhill multidimensional simplex minimization method. Streetpave 12 is the latest in jointed plain concrete pavement thickness design.
The software simplifies the process of using both the 1993 aashto design guide for asphalt pavements and 1998 aashto supplement for concrete pavements. Back calculation of layer parameters for ltpp test sections, volume ii. Preparation for implementation of the mechanisticempirical pavement design guide in michigan part 2. At present, interpretation of deflection basin test results usually is performed. Any license for the pavement me software can download the bct. Equivalent single axle load esal design period esals.
Mi is the coefficient of drainage for flexible pavement design used to modify layer coefficients. The use of either method has its merits and is an important choice you will need to make for any application. The back calculation is a userdependent procedure and produces a nonunique resilient modulus estimation. Total esal calculator american concrete pavement association. Basic design concepts 2 the layer modulus is preferably acquired by back calculation using measured deflections. This program is used to pavement design, construction evaluation and maintenance. It calculates pavement responses stresses, strains, and deflections and combines them with other. This tool calculates the total number of esals that have or will traverse a pavement for the purposes of pavement analysis or design. Important formulas for designing flexible pavements lec.
Ac 150537011b, use of nondestructive testing in the. Alizelcpc software for pavement structures analysis and design, roads, airfield pavements, port and logistic platforms, new projects, rehabilitation, deflexions analysis alizelcpc the professional software for design of pavement structures. Aashtoware pavement me design is a productionready software tool to support the daytoday operations of public and private pavement engineers. 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. In this project for flexible pavement design only commercial. Direct calculation method and full radiosity method. The importance in supplying safe and stable equipment and the newest technology forms the basis of the fwd equipment. A sophisticated software available for research groups for analysis of complex pavement interactions. Coefficient of drainage cd or mi cd is the coefficient of drainage for rigid pavement design used to account for improved or decreased quality of drainage. Design tools international society for concrete pavements. Index using falling weight deflectometer data with mechanistic. The first was to assess the potential use of traffic speed deflectometer tsd deflection for the design of pavement structural treatments. Users of me design will have a number of backcalculation tool licenses available to them. Mar 14, 2020 structural evaluation and strengthening of flexible road pavements using falling weight deflectometer data.
Falling weight deflectometer, fwd, pavement evaluation. Project traffic is indicated in terms of million standard axles. Graduate program in geotechnical engineering rutgers. Pavement design aims at determining the total thickness of the pavement structure as well as the thickness of the individual structural components for carrying the estimated traffic loading under the prevailing climatic conditions with satisfactory performance of the pavement. Recently, a deflection analysis of pavement structures daps software has been developed, which enables the rapid calculation of layer stiffness moduli using a singular decomposition technique. Software tools and solutions to design concrete pavements wcpa 2017 annual concrete pavement workshop february 15 17, 2017.
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