Properties considered in mix design superpave mix design method. Standard practice for development of hot mix asphalt mix designs qc 8. Asphalt mix design and job mix formulas purposes of mix designs 41 performance characteristics considered in mix design 41. The hma mix design submitted by the contractorproducer will be evaluated by the state materials laboratory in accordance with section 903. The relative proportions of these materials determine the physical properties of the hma and ultimately how the hma performs as a. A manual for design of hotmix asphalt with commentary the. See part ii for a typical densegraded design example by volume. Superpave mix design was developed as part of the strategic highway research program shrp from 1987 to 1993. This document provided guidelines on the selection and design of hot mix asphalt surfacing layers and was centred on the marshall design method. Prepare a design plan which makes best use of the available resources and meets the design requirements. An example of a polishing type aggregate is limestone. Note 1the title in parentheses is the abbreviated title given on the tabs of the workbook. 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. Group 1 20cez8070 priyansh singh 20cep2073 aayush kumar 20cep2074 anjaneyulu chinthireddy 20cep2080 leeza malik 20cep2083 munesh.
Depending on what wma technology used, a new mix design or at least initial laboratory work may be required prior to field production. This edition offers significantly expanded application and guidance relative to our previous mix design manuals. Aashto m 323 standard specification for superpave volumetric mix design. Out of print asphalt institute construction leaflets. Complete the documentation of the asphalt mix design.
Asphalt institute developed a mix design procedure. Examples of nonpolishing aggregates are granites, crushed gravel, silica sands and slag. The superpave mix design manual for new construction and. Optimized mix design mix design and production goals mix design goals stability. This is to establish the design target values for the production mix. Example for 55 mph highway pg 6422 for 30 mph highway pg 7022. Stone matrix asphalt this publication is adapted from the. Title and subtitle mixing and compaction temperatures for hot mix asphalt concrete 6. Project file job mix formula procedures 415 job mix formula numbering system 417 superpave mix type designations 418 superpave jmf example 419 asphalt mix design and testing calculation formulas 420 thru 422 section 5. 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. The first article covering the early design practices through the marshall and hveem systems was published in the spring 20 issue of asphalt magazine.
Project organization, mix design, and quality control. The manual is a practical guide based on proven technologies, incorporating the most current information available in 2014. Development of a new mix design method and specification. This is the second of two articles on the history of mix design. Mix design considerations mixture property component and construction effects on mixture properties asphalt.
Aashto t 11 standard method of test for materials finer than 75 m. Draft trh8 design and use of hot mix asphalt in pavements 1987. Technical recommendations for highways on asphalt mix design trh8 was published and in 1987 it was revised csra, 1987. 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. Hot mix asphalt may be referred to by several names. The final design may not be required to meet all of the traditional superpave criteria.
The contractor establishes the initial parameters for a mix design and serves as the starting point for subsequent proportioning calculations. Identify and confirm the asphalt mix project requirements and information for the completion of the design. Chapters discuss bituminous materials in mix design, the future of asphalt pavements, modified asphalt binders, and quality control and assurance. Asphalt mix types 32 pavement layer depth guidelines for pavement design purposes 33 application rates of spread per inch depth 33 typical asphalt binder contents 34 example roadway typical section 34 section 4. The purpose of this guidance note is to ensure that a. Aashto r 35 standard practice for superpave volumetric design for asphalt mixtures. Hot mix asphalt is composed of aggregate bound together.
Process has been referred to as a balanced mix design approach. The initial step in proportioning the mix design is to calculate the water content per cubic yard of concrete. 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. Improved mix design, evaluation, and materials management practices for hot mix asphalt with high reclaimed asphalt pavement content preliminary draft final report prepared for national cooperative highway research program transportation research board of the national academies randy west national center for asphalt technology auburn, al. Aashto r 30 standard practice for mixture conditioning of hot mix asphalt hma. The relative proportions of these materials determine the physical properties of the hma and ultimately how the hma performs as a finished pavement.
Nchrp 943 mix design practices for warm mix asphal t by ramon bonaquist, ph. Design of hot mix asphaltic concrete by the weight ratio. Procedure for resolving differences in asphalt binder testing pdf 220kb. Group 1 20cez8070 priyansh singh 20cep2073 aayush kumar 20cep2074 anjaneyulu chinthireddy 20cep2080 leeza malik 20cep2083 munesh kumar meena 20cep2778 yohannes legessedadi 20cep2086 saubhagya dixit. Prior to the beginning of production, aggregate stockpile samples shall be taken and a three point ltmf design check is preformed. The text is an ideal resource for concrete technologists. Kennedy university of texas at austin michael anderson the asphalt institute strategic highway research program national research council washington, dc 1994. Properties considered in mix design superpave mix design. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Properties considered in mix design good hma pavements function well because they are designed, produced and placed in such a way as to give them certain desirable properties. Rdgn022 mix design of bituminous materials page 3 of 3. History of asphalt mix design in north america, part 2. Trbs national cooperative highway research program nchrp report 673.
Asphalt treated bases atbs in texas are usually designed as per tex126e, molding, testing, and evaluating bituminous black base materials, and constructed as per item 292, asphalt treatment plantmixed, of the 2004 standard specification book. In different sections of the state it may also be referred to as bituminous concrete,hot plant mix, asphalt concrete, blacktop or superpave. Asphalt materials and mix design manual 1st edition. Asphaltpro magazine balance your mix design for asphalt. Access, interpret and apply compliance documentation relevant to the work activity. 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. Pavement materials and construction techniques laboratory records submission date. Standard practice for development of hot mix asphalt mix. The superpave mix design manual for new construction and overlays ronald j. Pdf development of a new asphalt mix design manual for south. Figure 58 control points for asphalt mix designs with 9. The 7 th edition of ms 2 asphalt mix design methods marks the 56 th year of continuous publication of an asphalt institute mix design manual. Mix designs based on 20 fhwa alf 3 vma x 3 design av x 3 in place av 6 extremes 21 different mixes. Authors yetkin yildirim, mansour solaimanian, and thomas w.
Title and subtitle using cement paste rheology to predict concrete mix design problems. Handbook ms2 mix design for asphalt concrete and other hot mix types,1984 edition, with modifications. 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. 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. Chapter 4 aggregates a manual for design of hotmix 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 technology developed since the conclusion of the strategic highway research program shrp. The book will benefit consulting engineers, contractors, government officials and engineers at various levels, and university students, educators, and researchers. August 2016 film thickness summary sheet summary grad chart. Stone matrix asphalt this publication is adapted from the unified facilities criteria of the united states. An example of proportioning a mix design through use of this form is detailed in table 3. This approach begins with the superpave mix design method to establish an initial aggregate blend and asphalt content.
Design of hot mix asphaltic concrete by the weight ratio method. Cl2 model specifications for small paving jobs pdf 1. Development of a new mix design method and specification requirements for asphalt treated base. Asphalt institute ms2 7th edition 2014 asphalt mix design methods ingilizce orijinal.
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. Chief operating officer advanced asphalt technologies, llc 108 powers court, suite 100 sterling, va 20166 phone. Cominsky university of texas at austin with contributions by. Documentation of quality control testing of rap stockpiles form 1879 asphalt tempvisc curve project of. The final report on the project that developed nchrp report 673 and. Mix design in hot mix asphalt, binder and aggregate are blended together in precise proportions. Monitor and coordinate the progress of other team members involved in the design process. See the example in part i for a typical mixture design by weight. Coarse aggregate gravity form 1859 fine aggregate gravity form 1860 regression sheet yesno. Equations for the above calculations follow in this text and their application may be expedited by use of the appropriate worksheet figure 1. Best practices 3rd edition national asphalt pavement association quality improvement publication 125, 3rd edition napa building 5100 forbes blvd. Development of a new mix design method and specification requirements for asphalt treated bases research report 063611 txdot project number 06361 performed in cooperation with the texas department of transportation p. Adjustments in the mix proportions are then permitted to meet the performance tests. Standard practice for development of hot mix asphalt mix designs.
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. 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 binder content based on intended application, performance requirementsneeds, and ultimately economics. Calculate the limiting asphalt content at the tentative design asphalt content. The emphasis placed on secondary properties such as flexibility, skid resistance and impermeability to water will depend on the specific function required of the. Pdf development of a new asphalt mix design manual for. The first step is registering the project using forms provided by usgbc. A manual for design of hotmix asphalt with commentary. Development of a new asphalt mix design manual for south africa. Handbook ms2 mix design for asphalt concrete and other hotmix types,1984 edition, with modifications. Ground rules for use of the superpave mix design system. 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. The mix design process is therefore essentially directed towards producing a durable mix which will exhibit minimal cracking and deformation during its design life. Examples include coarse continuously graded asphalt, stone mastic asphalt, ultrathin friction courses, and open graded asphalt porous asphalt. Concrete mix design, quality control and specification.
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. Concrete mix design, quality control and specification explores producing, designing, controlling, or specifying concrete, and addresses issues related with sustainability and the impact of new concrete materials such as ready mixed geopolymers, magnesium oxide, and calcium carbonate. Calculate the bearing capacity for each asphalt content. Cooperative highway research program nchrp report 673.