This test method is for use with mixtures containing penetration and viscosity or performance grade asphalt cements and aggregate up to 25 mm maximum size. 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 types,1984 edition, with modifications. In order to qualify for this award, the agency must submit documentation showing that the pavement has lasted more. Rdgn022 mix design of bituminous materials page 3 of 3. Ppt asphalt concrete mix design powerpoint presentation. Trbs national cooperative highway research program nchrp report 673. A demonstration of stone matrix asphalt mix designs using high polish value crushed stone introduction historically, the fort worth district has used either lightweight aggregate or a crushed gravel from reeves county, texas, when a polish value of 3s minimum was required for a hot mix. The mix needs a minimum vma to have enough volume to hold the proper amount of air voids and the proper amount of binder. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. Chapter 2 design and control of bituminous mixtures using a.
The purpose of this guidance note is to ensure that a standardized method is applied to the design procedure. The district office is required to submit pavement recommendations on all projects including. 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. Inspection reports off new york state department of. 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. Including the vfa requirement in a mix design helps prevent the design of hma with marginally acceptable vma. Asphaltic concrete mix design apwa type 401 objective perform a marshall mix design per the asphalt institute ms2 manual and aashto test methods conforming to the kansas city metropolitan chapter of the american public works association, 2001 edition, apwa type 401 specification 50 compaction blows per face. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. Calculate the bearing capacity for each asphalt content.
Calculate the limiting asphalt content at the tentative design asphalt content. 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 difficult to use in densegraded mixtures due to residual crumb rubber best used in gapgraded type mixtures sma and ogfc. Asphalt materials and mix design manual engineering books. Quality level pay ql paypercent within limits pay pwl payfield materials manualappendices and test methodstesting forms. National pavement implementation executive task group pietg highlighted bmd as needed focus area balanced mix design task force development history shrp2 peer to peer exchange 2016.
The laboratory work is designed to develop an understanding of. The surface course was an owneragency approved mix design for warm mix asphalt. Properties considered in mix design superpave mix design method. Contractor mix design guidelines for asphalt concrete january 2017 2 contractor mix design guidelines for asphalt concrete these guidelines outline the procedures to be used in developing, testing, and submitting asphalt concrete mix designs for odot contracts and for projects with other agencies that use the version of. 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. Best practices handbook on asphalt pavement maintenance. On such projects which also require polymer, 3 lifts of polymer modified mix will be required.
The following resources are related to the quality management and analysis of construction materials. Voids filled with asphalt vfa are the void spaces that exist between the aggregate particles in the compacted paving hma that are filled with binder. Pdf development of a new asphalt mix design manual for. Asphalt mix design manual for south africa, provisional working document november 2014 preface the purpose of this sabita manual is to establish a common base for the design of asphalt mixes in. This special publication focuses on the history, development, trends, and evolution of hot mix asphalt design and pavement construction.
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 intent of the asphalt mix design registration process is to ensure asphalt mixes are designed and can be produced by a particular manufacturing plant to comply with the requirements of the relevant asphalt specification. Generally, there is a worldwide shift from empiricalbased asphalt mix design approach towards performancerelated design approaches, due to advances in asphalt technology, increased volumes of. Practical approaches to hotmix asphalt mix design and. Depending on what wma technology used, a new mix design or at least initial laboratory work may be required prior to field production. Asphalt mix design manual for south africa, provisional working document november 2014 asphalt mix design manual for south africa draft document june 2014 southern african bitumen association sabita post net suite 56, private bag x21 howard place, 7450. 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. General scope the department has established procedures for the design and control of bituminous concrete based on marshall method for more than 30 years. A mix design will be registered if the requirements of mrts30 asphalt.
Skid resistance 43 impermeability 43 low temperatureshrinkage cracking 43 workability 43 economics 43 the mix design process 43 aggregate properties and gradation requirements 43 asphalt binder grade selection and requirements 44. Mix type selection pavement type selection processes are used by pavement authorities such as state highway agencies to identify the most beneficial type of pavement structure for a given set of traffic, soils, climate, and other factors. A manual for design of hotmix asphalt with commentary. Mix design considerations for asphalt wearing courses with high reclaimed asphalt content. 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.
It is filled with the volume of air voids plus the volume of the binder not absorbed into the aggregate. Vfa is expressed as a percentage of the vma that contains binder. May 17, 2017 ce221 spring 2017 this video was produced with a swivl. A manual for design of hotmix asphalt with commentary the. The purpose of the manual for asphalt materials and mix design hereafter referred to as the manual is to familiarize students with the technology of asphalt in its several forms namely asphalt cement, cutback asphalt, and asphalt emulsions. Pdf mix design considerations for asphalt wearing courses. Process has been referred to as a balanced mix design approach. The asphalt pavement alliance has awarded its perpetual pavement awards to 69 asphalt pavements since 2001. The mix design is based on the volumetric properties of the hma in terms of the air voids v, voids in the mineral aggregate vma, and voids. Chapters discuss bituminous materials in mix design, the future of asphalt pavements, modified asphalt binders, and quality control and assurance. Best practices handbook on asphalt pavement maintenance february 2000 publishedby minnesota technology transfer t2 center ltai program center for transportation studies university of minnesota 5 1 1 washington avenue s. 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. Vma is the volumetric void space created by the aggregate particles in an asphalt mixture. 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.
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