This document is not a report of the national research council or. Hot mix asphalt hma is a combination of aggregate and asphalt binder mixed at an elevated temperature to form a hard, strong pavement construction material. History of asphalt mix design in north america, part 2. Hot mix asphalt may be referred to by several names. The objective of a foamed asphalt mix design is to select the mix proportions, one of which is bitumen content, in order to. The relative proportions of these materials determine the physical properties of the hma and ultimately how the hma performs as a finished pavement. Advisory circular ac 150537014b, hot mix asphalt paving. A manual for design of hotmix asphalt with commentary incorporates the many advances in materials characterization and hotmix asphalt hma mix design technology developed since the conclusion of the strategic highway research program shrp. Mechanisticempirical asphalt overlay thickness design and. Practical approaches to hotmix asphalt mix design and production. Hotmix asphalt mixture design verification procedure. This method also addresses the treatment of reclaimed asphalt pavement rap for mix design purposes section 7. Detailed, stepbystep procedures are provided in a companion document, nchrp report 452, recommended use of reclaimed asphalt pavement in the superpave mix design. This ac is a reissuance of the hotmix asphalt paving handbook 2000.
Pavement materials and construction techniques laboratory records submission date. Complete the design of the asphalt mix that safely, effectively and efficiently meets the required project outcomes. Fillers desirable properties of a bituminous mixture stability, flexibility, deformation, crac. Pdf mix design considerations for asphalt wearing courses with. Welcome to the ncdot materials and tests units new web format of the quality management system qms asphalt manual. The following standards of the asphalt institute are also a part of these specifications. Hot mix asphalt mixture design verification procedure appendix b. Complete the documentation of the asphalt mix design. Asphalt mix design manual for south africa, provisional working document november 2014. Much of what determines long term pavement performance of. Properties considered in mix design superpave mix design method.
If a conflict arises between the standard specifications for roads and structures or contract documents and this manual, the specifications and contract documents. Calculate the limiting asphalt content at the tentative design asphalt content. The manual is a practical guide based on proven technologies, incorporating the most current information available in 2014. This manual was developed to provide a more userfriendly, interactive and searchable format for our users. Mix design considerations for asphalt wearing courses with high reclaimed asphalt content conference paper pdf available june 2015 with 2,141 reads how we measure reads. Depending on what wma technology used, a new mix design or at least initial laboratory work may be required prior to field production. Marshall method of mix design the basic concepts of the marshall mix design method were originally developed by bruce marshall of the mississippi highway department around 1939 and then refined by the u. This is the second of two articles on the history of mix design. Section references are for the most recent standard specifications. Superpave mix design was developed as part of the strategic highway research program shrp from 1987 to 1993. Procedures for sampling asphalt mixturesdensity cores and. Hot mix asphalt is composed of aggregate bound together.
Technical recommendations for highways draft trh8 design and use of hot mix asphalt in pavements 1987 isbn 0 7988 4159 1 draft trh8, pp 146, pretoria, south africa, 1987. City of phoenix programming and project delivery division. The purpose of this document is to establish an acceptance procedure for hot mix asphalt mix designs. Pdf mix design considerations for asphalt wearing courses. It is filled with the volume of air voids plus the volume of the binder not absorbed into the aggregate. The rock provides the skeleton and the asphalt provides the glue or muscles to hold the skeleton together. In mix design testing and analysis, density of the compacted specimen is usually expressed in pounds per cubic foot lbft3. Superpave mix design window superpave mixpack qcqa. Stonemontqc aggregate and asphalt capabilities are completely integrated thus allowing mix. This lecture includes following topics what is a mix design. Aashto m 323 standard specification for superpave volumetric mix design.
Calculate the bearing capacity for each asphalt content. Best practices 3rd edition national asphalt pavement association quality improvement publication 125, 3rd edition napa building 5100 forbes blvd. The apparatus must be calibrated for the specific mix design. Following are the recommend guides for the proper application of the special provision for high stress hot mix asphalt mixture. Use this pay item feet on either side of the center of. Stonemontqc includes powerful asphalt mix design and quality control features for asphalt producers. City of phoenix design and construction management. Similar steps and procedures are appropriate for marshall mix designs as well. The program is successfully verified with an example. City of phoenix design and construction management materials lab 2018 approved conventional asphalt mix. Title and subtitle using cement paste rheology to predict concrete mix design problems.
The book will benefit consulting engineers, contractors, government officials and engineers at various levels, and university students, educators, and researchers. Designing hot mix asphaltic concrete by the weight ratio method purpose the purpose of this report is to establish a method for adjusting current radation specifications and to establish a fair bidding method for hmac when using aggregates with wide differences in specific gravities. The 7 th edition of ms2 asphalt mix design methods marks the 56 th year of continuous publication of an asphalt institute mix design manual. The marshall stability of the mix design is defined as a maximum load carried by a compacted specimen at a standard temperature of 60 oc. Hot mix asphalt hma selection guidance december 2017. The purpose of this document is to provide a guide to the asphalt mix design. Marshall mix design select and test aggregate select and test asphalt cement establish mixing and compaction temperatures develop trial blends heat and mix asphalt cement and aggregates compact specimen 102 mm diameter bit. Air voids are small air spaces or pockets of air that occur between the coated aggregate particles in the final compacted hma. Designing and constructing sma mixtures illinois asphalt. A manual for design of hot mix asphalt with commentary incorporates the many advances in materials characterization and hot mix asphalt hma mix design. The gapgraded type encompasses both gapgraded asphalt concrete mixes and stonematrix asphalt. Capital preventive maintenance capm guidelines pdf dib 86. This document describes the procedure for designing bituminous materials in accordance with the marshall method of mix design stated in the asphalt institute handbook ms2 mix design for asphalt concrete and other hot mix. Sma, stone matrix asphalt, hot mix asphalt, stoneonstone contact, mixture design, plant.
Materials selection binder the design process starts with material selection. An aggregate mix design may not be changed if it is approved. The algorithm is implemented in matlab as an asphalt mix design optimization amido program. The asphalt binder content is expressed as percent of moisturefree mix mass. The superpave mix design manual for new construction and. Pdf development of a mixture design procedure for stone matrix.
Asphalt institute developed a mix design procedure mainly for fine. Group 1 20cez8070 priyansh singh 20cep2073 aayush kumar 20cep2074 anjaneyulu chinthireddy 20cep2080 leeza malik 20cep2083 munesh kumar meena 20cep2778 yohannes legessedadi 20cep2086 saubhagya dixit. For all vulcan materials mix designs, verify the oil supplier from the ticket and specify which oil supplier hollywestern is being utilized in the daily report. Prepare g of mix, cool at room temp for 24 2 hrs bring oil bath to between 325 and 350of obtain a 200 g representative sample of the mix fill 2000 ml beaker about halfway with distilled water and heat to boiling add mix sample to beaker, maintain boil for 10 m 30 s remove beaker and skim asphalt from water surface. Design and optimum are often used interchangeably however, they mean two different things there can be many design binder contents for a mix, but only one truly optimum optimum indicates the best. February 28, 2019 february 28, 2019 manual of test procedures for materials b. Asphalt institute ms2 7th edition 2014 asphalt mix design methods ingilizce orijinal. The key aspect to the performance of any asphalt mixture is the selection of the. This report documents the best practices for the use of ras in hma in terms of ras processing, characterizing the processed ras binder content, gradations, and performance grade pg, ras mix design. This design procedure is based on the marshall method of design as detailed in the applicable documents section below.
Mix design methods for asphalt concrete, by the asphalt. For all subsequent samples, measurefrom the same side of the mat unless safety is an issue. Hot mix asphalt hma for local agency applications wsdot. A manual for design of hotmix asphalt with commentary. Aggregate test data hot mix asphalt physical properties coarse and fine extracted aggregate phcc449d mar18 use with ssp 110s12 september 2016 or later or opss. Equations for the above calculations follow in this text and their application may be expedited by use of the appropriate worksheet figure 1. The recommendations for mix design, plant production, paving, compaction, and quality. Cominsky university of texas at austin with contributions by. Chapters discuss bituminous materials in mix design, the future of asphalt pavements, modified asphalt binders, and quality control and assurance. Aashto r 30 standard practice for mixture conditioning of hot mix asphalt hma. Mix design in hot mix asphalt, binder and aggregate are blended together in precise proportions. The superpave mix design manual for new construction and overlays ronald j. Read a manual for design of hotmix asphalt with commentary.
The amount of recycling of reclaimed asphalt ra in new. Cs4 minimum quality control plan for field asphalt paving operations. Pdf the role of aggregate gradation in hotmix asphalt performance is well documented in the. Design guide and standards for roadway rehabilitation projects pdf dib 81. This guidance applies to all approved hma mix design laboratories that design hma mixtures for indot contracts. Prepare a cost estimate of the execution of the designed asphalt mix. Procedures manual for hma mix design processing hot mix asphalt hma mix design laboratory qualifications 2 revised. Work on the project is considered complete upon placement of the bituminous mix and temporary pavement markings at paving only locations. Napa will be holding a paving for performance designed to perform conference in atlanta on october 11. Submittal and approval of hot mix asphalt mix designs sop. In different sections of the state it may also be referred to as bituminous concrete,hot plant mix, asphalt concrete, blacktop or superpave. The skeleton must carry the weight while the muscles must be strong enough to hold the skeleton in place but. Project organization, mix design, and quality control. The senior and design engineers in that division perform the majority of the production pavement and routine pavementrelated geotechnical design work for mdsha.
Note the supplier on the city of phoenix sample card. Include sessions on balanced mix design and performance specifications. Use viscosity instead of performance graded binder properties for blending chart. Required quality lowest cost for required quality manageable risk level an optimized design approach should yield a mix which meets the mix design and production goals. The sample be taken shall perpendicularly to the rear of the paver. The hma pavement mix type selection guide provides designers with methods for selecting appropriate mix types while considering factors such as traffic, environment, subsurface pavement structure, existing pavement condition and preparation, and economics. Handbook ms2 mix design for asphalt concrete and other hot mix types,1984 edition, with modifications. The mix needs a minimum vma to have enough volume to hold the proper amount of air voids and the proper amount of binder. Asphalt mix design and quality control software management system. Aggregate mix design window allows for the addition, modification, and approval of aggregate mix designs. Table 1 above provides a list of mix performance tests that are commonly used in asphalt research and are being considered by highway agencies for use in mix design approval.
Asphaltic concrete mix design road surface asphalt free. Design of hot mix asphaltic concrete by the weight ratio method. These guidelines provide for the selection of hot mixed asphalt hma and application rates utilizing the superpave mix design system along with the marshall mix design system. Pdf asphalt mix design optimization for efficient plant management. Asphalt mix design guide australian asphalt pavement association. Note the oil supplier on the city of phoenix sample card. Construction specifications for asphalt concrete, by the asphalt institute. Identifies the sample used to approve the material contained within the aggregate mix design. Asphalt mix design classes, offered by the asphalt institute, are usually 35 days in length and feature handson laboratory experience as well as detailed classroom instruction.
An example of the difference between weight and volume of asphalt mixture is given in figure 41. Asphaltpro magazine balance your mix design for asphalt. Trbs national cooperative highway research program nchrp report 673. Draft trh8 design and use of hot mix asphalt in pavements 1987. The purpose of this guidance note is to ensure that a.
Ms2 asphalt mix design methods asphalt institute bookstore. To include any mix performance test in the bmd procedure, criteria for the test result must be established based on a strong relationship to field performance. For a high stress application for a mixture type 5e3 placed in an intersection the recommended binder grade would be a pg7028p instead of a pg6428. Brown and others published development of a mixture design procedure for stone matrix asphalt sma find, read. City of phoenix programming and project delivery division materials lab 2019 approved conventional asphalt mix designs the following mix. Asphalt rubber applications asphalt rubber is the process of adding recycled, crumb rubber to hot mix asphalt called dry process or the asphalt binder called wet process to modify the final mixture. External contract report cr98077 foamed asphalt mixes. Most wma additives dont require the mix design to be recreated field trials have shown that mixture volumetrics are nearly identical between hma and that same hma mix design with wma additives.
Optimized mix design mix design and production goals mix design goals stability. Initial balanced mix design training course was conducted by ncat with others scheduled throughout 2017. Aashto r 35 standard practice for superpave volumetric design for asphalt. This webinar provides the student with a basic overview of the purpose, tests, and analyses needed to conduct an asphalt mix design. Pdf development of a new asphalt mix design manual for. The first article covering the early design practices through the marshall and hveem systems was published in the spring 20 issue of asphalt magazine. Hma pavement mix type selection guide transportation. Properties considered in mix design superpave mix design. The role of mix design relative to mixture behavior dur. Cr98077 foamed asphalt mixes mix design procedure 4 3 design considerations 3. On such projects which also require polymer, 3 lifts of polymer modified mix. Form cem3512, contractor hot mix asphalt design data, which documents the testing data developed by the mix design laboratory. Asphaltic concrete mix design free download as powerpoint presentation.
Michigan department of transportation construction field services bituminous mix design. The austroads mix design procedure uses gyratory compacted specimens. Vma is the volumetric void space created by the aggregate particles in an asphalt mixture. A pay estimate will be prepared on the 1 st and 3rd monday of each month after an itemized bill has been received from the bidder covering the work completed on the project. Dd is the district central office is 00 yy is the year ssss is the mix id.
Hot mix asphalt mix design in simplest terms, hot mix asphalt hma is nothing more than a combination of rocks and asphalt. The information presented in the handbook is still valid and, although most of the information can be found in other documents, the bulk of the information in the handbook remains useful for airport operators. For 25 mm mix, the coarse aggregate is defined as the. Marshall method of design as detailed in the applicable documents section below. The opengraded type includes the subtypes opengraded friction course and asphalt treated permeable base. Kennedy university of texas at austin michael anderson the asphalt.
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