It is a pavement engineering program which is used to analyse flexible pavement. Ufc 325001 pavement design for roads and parking areas. The apai software designs asphalt pavements based on premechanisticempirical aashto methodology. For fulldepth heavyduty commercial lots, it is recommended to apply a layer about 7. Pavia systems, with sponsorship from the asphalt pavement alliance apa and its constituent members, has developed free online pavement thickness design software called pavexpress. Drainage problems are also a major cause of parking area pavement failure.
E how thick should i specify the asphalt on my project, considering the number. The most popular version among asphalt institute sw1 users is 1. Sw1 asphalt thickness design for highways, airports. This guide presents examples of designs, procedures, and applications that have. Winpas 12 is compatible with all versions of windows, including windows 7, and both architecture types 3264bit. This software was originally produced by asphalt institute. Asphalt mix design and quality control software management system stonemontqc includes powerful asphalt mix design and quality control features for asphalt producers. See the recommended thickness design software section below for current and robust alternatives to sw1. An asphalt mix design can be created using the following 10 steps. Lhi was made for lowvolume roads with less than 2,000 vehicles per day, and uses basic inputs that can be determined by a small highway department and other precalculated inputs and design assumptions to help them determine the thickness of a new asphalt layer. The asphalt institute developed sw1 to provide users the capability to design asphalt pavements for highways, streets, parking lots, airports, industrial facilities supporting heavy wheel loads, and other applications. This 2016 asphalt pavement design guide has been prepared to assist readers in understanding asphalt mix pavement design, construction, and rehabilitation. Perroadxpress then allows the designer either to use defaults for traffic and soil, or to input the actual values if they are known.
Note that the thickness assumed for the granular subbase in step 5 can influence the required slab thickness computed in step 8. Perroadxpress was developed in response to requests by public works officials and owners of commercial property. Design traffic esals esals is the estimate of number of equivalent 18 kip single axle. For a lightduty parking lot with an aggregate base, a hot mix asphalt layer of 3 thick on a 6 aggregate base is recommended. Pavexpress webbased scoping tool eases pavement design. Regarding mix design software, many state dots have their own required software to be. Streetpave designs the concrete pavement thickness based on the pca method and the equivalent asphalt pavement thickness. However, as it encompasses the wide range of materials and conditions found in australia and new zealand. A mechanisticempirical pavement thickness design program based on familiar asphalt institute methods. There is no plan to update either software package. After logging in, users can create a new mix design, share, remove, or copy an existing mix design, or download the user manual by clicking on the corresponding buttons. This pavement design guide,prepared by the pennsylvania asphalt pavement association papa, is provided for the practitioner architect, municipal and township engineer, and developer who to some extent is involved with the design of hotmix asphalt hma pavements of various types constructed in pennsylvania.
Pavement calculator pavement design calculator software. For asphalt concrete base pavements thickness in inches design criteria asphalt concrete traffic class subgrade adt class cbr base surface total ii good 9 4. Stonemontqc aggregate and asphalt capabilities are completely integrated thus allowing mix component properties to be easily updated or substituted from aggregate plants. For a heavyduty parking lot with an aggregate base, it is recommended to install. Some inputs to aashto equation are set in the standard. The parking area is the first part of a building complex seen by the user. Authors fujie zhou, sheng hu, xiaodi hu, and tom scullion 8. Pavexpress webbased scoping tool eases pavement design based on industry standards, new webbased tool aids in specifying technically sound pavements. Pavement thickness design evolves with latest software asphalt. To help agencies and contractors meet the demand for highquality pavements, napas asphalt pavement magazine regularly provides articles that directly address issues such as mix type selection and statistical specifications.
The mepdg is designed to update the 1993 aashto guide for design of pavement structures, which is primarily based on empirical observations from the aasho road test that began in the 1950s. Compaction of this asphalt base is one of the most important construction operations contributing to the proper. Asphalt film thickness is often mentioned in the literature on asphalt paving technology. Asphalt paving is applied with paving machines that apply an even thickness of the asphalt paving material. Perroad software asphalt pavement alliance asphalt. Calback is a software developed by caltransucprc to backcalculate layer moduli of flexible and rigid pavements using fwd deflection data collected from existing pavements. Mndot flexible pavement design, rvalue method excel, 0. New asphalt, 1993 aashto design guide new concrete, 1998 supplement ac overlay on asphalt, 1993 guide ac overlay on concrete or composite no design performed this presentation will focus on new asphalt designs and ac overlay on asphalt designs. Sensitivity analysis of pavement thickness design software for local. The following graph illustrates the considerable reduction in asphalt thickness for pavements at higher traffic loads designed with circly 7. Winpas 12, which is based on the commonlyused aashto 1993 pavement design guide, has been updated to make it compatible with current windowsbased operating systems, has a new gui or graphical user interface, and includes updated help. Nov 10, 2014 the national center for asphalt technology ncat recently released guidance on recalibrating the structural asphalt layer coefficient in the aashto 1993 design guide.
The national center for asphalt technology ncat recently released guidance on recalibrating the structural asphalt layer coefficient in the aashto 1993 design guide. No similar reduction is performed with the concrete design. Pavement thickness design for local roads in iowa, tr586. Software tools and solutions to design concrete pavements. Streetpave 12 is the latest in jointed plain concrete pavement thickness design. Characterizing existing hotmix asphalt layer damage for mechanistic pavement rehabilitation design fhwaproj140126 demonstration of network level pavement structural evaluation with traffic speed deflectometer fhwaproj095. Aggregate sizes of the mix design should be checked prior to use in thinner lifts. Lundy department of civil engineering oregon state university. Users cannot share, remove, or copy a mix design until one has been created. This 2018 asphalt parking lot design guide has been prepared to assist readers in understanding all phases of asphalt parking lot design, including planning, construction and maintenance. The maryland asphalt association recommends the use of these specifications.
Although newer mechanisticempirical design methods have been developed, 78. The empirical design equations for flexible and rigid pavements in eqs. Streetpave inappropriately reduces the single subgrade modulus value that is input by the user prior to running the asphalt design calculation. The asphalt institute developed sw1 to provide users the capability to design asphalt. New software tool will help local agencies do their own. Normally 50 years for concrete and 30 years for asphalt. Circly implements mechanistic pavement design with stateoftheart pavement material properties and performance models. A simpliflied and abridged version of the 1981 edition of the asphalt institutes thickness design manual ms01 information by asphalt institute jan 1, 2001 paperback. The software simplifies the process of using both the 1993 aashto design guide for asphalt pavements and 1998 aashto supplement for concrete pavements. Circly leading pavement design software for roads and highways. The majority of the thickness of the pavement structure comes from the paving platform refer to. Asphalt thickness design for highways, airports, heavy. Base designations 19 mm superpave generally a minimum lift thickness of 3 is recommended.
Acpa offers a variety of concrete pavement and concrete overlay thickness design software, including. Pavia systems, with sponsorship from the asphalt pavement alliance apa and its constituent members, has developed online pavement thickness design software called pavexpress figure 2. It is recommended that the thickness of the asphalt pavement section for parking lots be designed by a. Acpas marketing claim of equivalent asphalt and concrete design sections within their new thickness design software program is false. Concrete thickness design is not modified from aashto. The advice has been generally developed from the approaches followed by the austroads member agencies. Implementation of composite pavement systems, fhwahif19014 2019. Hicks department of civil engineering oregon state university corvallis, or 97331 paul curren pavement engineering inc. 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. Pavement thickness design evolves with latest software. The software is written in strict conformance to the asphalt institute ms1, ms11, ms17, and ms23 manuals.
The main features of asphalt pavement design procedures adopted by some state dots for low volume roads are summarized in table 1. The software quickly provides the user with a recommendation for the total thickness of asphalt pavement needed for a particular situation. The spreadsheet breaks the design process into 10 steps and is designed to prompt the user for. The unified facilities criteria ufc system is prescribed by milstd 3007 and provides planning, design, construction, sustainment, restoration, and modernization criteria, and applies.
The ninth edition presents a multi layered elastic design approach to pavement thickness design, rather than empirical. Granular base thicknesses from 0 to 10 inches are included. Facilities development manual wisconsin department of. E design software and corresponding documentation called the mechanistic. Pavement structural design provides advice for the structural design of sealed road pavements. It is based on elastic multilayer theory and can be. Circly leading pavement design software for roads and. 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. If desired, several design alternatives can be evaluated to arrive at the optimal design.
Njdot pavement and drainage management and technology. Stand alone software version of the pavement design portion of the ce calc website. Calculate proper pavement thickness with free online tool. It should be spread and compacted to the thickness indicated on the plans. Tr586, pavement thickness design for local roads in iowa. Mechanisticempirical asphalt overlay thickness design and. The aashto 93 design methods are based on empirical data gathered in road tests from 1958 to 1960. Pavement design highway users have an increased awareness of pavement quality.
Fdm 141010 hot mix asphalt hma pavement design february 18, 2020 10. A simplified pavement design tool county engineersmd. Analysis period n n is the period of time for which the analysis is to be conducted. The software tool is now available for download here. Quality asphalt pavement may be constructed in a wide range of soil, weather, and loading conditions. The turn of the century brought beta versions of the m. Although the concept of asphalt film thickness sort of makes sense, the reality is a different story. The design thickness for these lanes or any pavement areas carrying this type traffic should be increased.
Sw1 asphalt thickness design for highways, airports, heavy. Sw1 is a powerful tool for use in design and analysis of asphalt. The software is written in strict conformance to the asphalt institute ms1, ms11, ms17, and ms23. A few highway agencies have used minimum asphalt film thickness as a mix design and quality assurance criteria. The software only asks users for inputs required to create technically sound pavement designs, and it suggests industryaccepted defaults where appropriate. Pavement design software asphalt pavement association of. Asphalt institute member portal shop product details. Ncat report 14 04 flexible pavement design state of the practice. The winpas software performs both concrete and asphalt pavements following the aashto 1993 design method.
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