This course provides an overview of the superpave mix design for local agencies and adjustments needed to start transitioning to the new mix design. Kennedy university of texas at austin michael anderson the asphalt institute strategic highway research program national research council washington, dc 1994. First, design compaction levels are established and materials are selected and characterized. A manual for design of hotmix asphalt with commentary.
Superpave versus marshall method of mix design marshall method, despite its shortcomings, is still probably the most widely used mix design method in the world. Understanding superpave mix design federal highway administration 1995 video vh353 superpave, superior performing asphalt pavements, is presented as the mix design system for the next century. The superpave trademark mix design system software contains a database of 5,3 united states and 1,515 canadian weather stations, which can be used to select a suitable performance grade of asphalt binder for a paving project, based on prevailing weather conditions in the area. Experimental characterization of rutting performance of hma designed with aggregate gradations according to superpave and marshall methods. Generally, this results in a paving mix which is coarser, has less sand, and less liquid asphalt. Volumetric requirements for superpave mix design the.
Full details of the superpave asphalt binder specification. This section briefly discusses the superpave mix design method wapa pavement note on mix design. 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. Practice for superpave volumetric design for hot mix asphalt hma aashto r 35 glossary air voids va the total volume of the small pockets of air between the coated aggregate particles throughout a compacted paving mixture, expressed as percent of the bulk volume of the compacted paving mixture. Payment adjustments will apply to hma placed under this specification unless the hma is deemed exempt in accordance with section 344. This manual gives detailed consideration to the superpave mix design procedures. Superpave in 1998, the mainedot changed its method of designing hot mix for maine roads. It is a mix design system that can be used for every type of pavement from golf cart paths and parking lots to the 400 series highways. Design traffic level million esals2 coarse aggregate angularity. Understanding superpave mix design superpave, superior performing asphalt pavements, is presented as the mix design system for the next century. Superpave mix design criteria table 6103 412 superpave virgin asphalt grades used for various %s of rap table 6104 4 ncdot master job mix formula procedures 4 composition of recycled mixtures jmf 414 project file job mix formula procedures 415. Superpave volumetric mix design and analysis volume i i. The superpave mix design manual for new construction and overlays. Pdf superpave design aggregate structure considering.
The superpave gyratory method of laboratory compaction is also shown. Description construct a hot mix asphalt hma pavement layer composed of a compacted, superpave sp mixture of aggregate and asphalt binder mixed hot in a mixing plant. The superpave mix design method was designed to replace the hveem and marshall methods. The superpave system ties asphalt binder and aggregate selection into the mix design process, and considers traffic and climate as well.
Superpave gyratory method washington asphalt pavement. Pdf comparison of marshall and superpave asphalt design. Volumetric requirements for superpave mix design examines whether changes to the recommended superpave mix design criteria for voids in mineral aggregate, voids filled with asphalt, and air voids content might further enhance the performance and durability of hotmix asphalt. The superpave mix design method was designed to replace the hveem and marshall.
Pdf the quality of asphalt concrete in flexible pavements plays a major. The new mix design accounts for traffic loading and environmental conditions and includes a new method of evaluating the asphalt mixture. Sheikh edrees, comparison of marshall and superpave asphalt design methods for sudan pavement mix es, international journal of scientific and technical advancements. Cominsky university of texas at austin with contributions by. History of design air voids marshall mix design set up in late 1940s design voids set at 3 to 5% marshall mix compaction standard rolling train static steel wheel pneumatic tired 8% will densify under traffic to 4% density at end of life design density. Using rap in the superpave mix design system mike anderson, asphalt institute cupga 2005 victoria, bc november 6, 2005.
Read a manual for design of hotmix asphalt with commentary. Superpave overview nthe final product of the shrp asphalt program area is superpave. Mar 20, 2007 sharing knowledge of the superpave procedures throughout the highway industry will speed the implementation of superpave as the standard asphalt binder selection and mix design. Superpave consists of 1 an asphalt binder specification, 2 an hma mix design method and 3 hma. The volumetric analysis common to the hveem and marshall methods provides the basis for the superpave mix design method. Superpave is an overarching term for the results of the asphalt research portion of the 1987 1993 strategic highway research program shrp. Superpave this workshop is intended to demonstrate the superpave asphalt mixture design system developed by the strategic highway research program shrp, along with the application of certain innovative concepts in field management of asphalt mixes. Materials selection binder the design process starts with material selection. Mack, deputy chief engineer, new york state dot retired, whose energies and commitment have long served the trb superpave committee. The key aspect to the performance of any asphalt mixture is the selection of the optimum materials that will be used in the mixture. One of the key components of superpave is materials selection. One thing i had been wondering prior to purchase was, is there a difference between sp1 and sp2. A superpave mix design includes several processes and decision points. However, the existing superpave design system does not properly address perform.
Superpave mix design 48 determining the design asphalt content the selected trial blend becomes the design aggregate structure. Mix design in hot mix asphalt, binder and aggregate are blended together in precise proportions. The primary features of marshall mix design are a densityvoids analysis and the stabilityflow test. Superpave design aggregate structure considering uncertainty.
Pavexpress is a free online tool to create pavement designs using key engineering inputs, based on the aashto 1993 and 1998 supplement pavement design process and equations. Description construct a hotmix asphalt hma pavement layer composed of a compacted, superpave sp mixture of aggregate and asphalt binder mixed hot in a mixing plant. Using rap in the superpave mix design system mike anderson, asphalt institute cupga 2005. Its pretty much as i expected its the manual for how to design a pavement using superpave. The superpave mix design manual for new construction and. Average daily traffic adt greater than 15,000 recommended minimum lift thickness 2 9. These volumetric properties are then evaluated to select a mix design or to control the mixture quality during production. Harrigan strategic highway research program ronald j. Wsdot uses the superpave mix design method also commonly called the gyratory mix design method.
Aug 30, 2010 understanding superpave mix design federal highway administration 1995 video vh353 superpave, superior performing asphalt pavements, is presented as the mix design system for the next century. Sharing knowledge of the superpave procedures throughout the highway industry will speed the implementation of superpave as the standard asphalt binder selection and mix design. Like the hveem and marshall methods, the superpave method has been proven to produce quality hma from which longlasting pavements can be constructed. Superpave mix design for local agencies 183idm270122. Hdot has built several pavements using the superpave mix design method and plans on doing even more in the future.
This text will explain the method of compacting samples of the superpave mix using the superpave gyratory compactor and determining their percent compaction. Superpave performance by design final report of the trb superpave committee. Asphalt institute 2001 superpave mix design series no. Calculating design life esals for superpave paving courses, the specification of 65 gyration asphalt mix designs will not be allowed on projects let after december 30, 2016. Performance by design transportation research board miscellaneous report isbn 0309094143 transportation research board publications are available by ordering individual publications directly from the trb business office, through. The ontario ministry of transportation started implementation of superpave in the late 1990s and by 2006, superpave mix design technology was standard practice on all mto projects. The superpave mix design manual for new construction and overlays ronald j. Properties considered in mix design superpave mix design. The answer is yes comparing my copy of sp2 to my friends sp1, the two books have a lot of overlap, but sp2 has less detail about asphalt selection. The relative proportions of these materials determine the physical properties of the hma and ultimately how the hma performs as a finished pavement.
The compaction devices from the hveem and marshall procedures have been replaced by a. The superpave regional centers are a unique source of expertise and assistance for highway agencies in their quest to build better, longer lasting roads. Trbs national cooperative highway research program nchrp report 567. Acknowledgments becky mcdaniel, purdue university principal investigator, nchrp 912 research ed harrigan, nchrp senior program officer, nchrp 912 tim murphy, consultant. The only acceptable asphalt mix designs will be 50 gyrations c mix vs. Recommended thickness design software for roadways. Major steps in superpave nselection of materials, nselection of a design aggregate structure, nselection of the design binder content,and nevaluation of moisture sensitivity of the design mixture. Selection of trial blends article pdf available in journal of testing and evaluation 481 january 2020 with 631 reads. History of design air voids national asphalt pavement. Trbs national cooperative highway research program nchrp report 673. One of the principal results from the strategic highway research program shrp was the superpave mix design method. Download directly book superpave mix design manual sp2 pdf download is absolutely free and you can choose the format pdf, kindle, epub, iphone and mobi, etc superpave mix design manual sp2 pdf complete superpave mix design manual sp2 available in formats pdf, kindle, epub, itunes and mobi also. The change involved a switch from the old hveem design method to the superpave design method. Compacted samples of the superpave mix are used to determine the volumetric and mechanical properties during the mix design phase and for quality controlquality assurance during construction.
Superpave asphalt mixture design workshop developed by the asphalt team thomas harman 202 4933072 federal highway administration, hrdi11 6300 georgetown pike, mclean, va 22101 john dangelo 202 3660121 john bukowski 202 3661287 federal highway administration, hipt 400 seventh street, s. Mix design procedures and tests shall be in accordance with aashto r 35 except as noted below. Superpave mix design specifies aggregate gradation control points, through which. Under the guidance of the trb superpave committee and the expert task group on communications, the report was drafted by neil f. Aggregate sizes of the mix design should be checked prior to use in thinner lifts.
Mix design procedures for superpave mi xes that contai n rap shal l be i n acco rdance w ith the recommendati ons i n. Sp2 by the asphalt institute, lexington, kentucky or aashto standard practice. Refinements to the concepts of asphalt mix design procedures came about not only with. Prior to superpave, marshall mix design was widely used in the united states, and is by far, the most commonly used asphalt mixture design procedure worldwide. Properties considered in mix design superpave mix design method. The product of the shrp asphalt research program thomas w. Much of the material contained in this manual was originally produced by the asphalt. This method may be used with laboratoryprepared specimens, as in the mix design process, or with plantmixed material during construction. Asphalt institute ms2 7th edition 2014 asphalt mix design methods ingilizce orijinal. Batch, mix, and compact more samples with this gradation with four asphalt contents. Volumetric requirements for superpave mix design examines whether changes to the recommended superpave mix design criteria for voids in mineral aggregate, voids filled with asphalt, and air voids content might further enhance the performance and durability of hot mix asphalt. This section briefly discusses the superpave mix design method. Then, mixture samples are prepared and laboratory test results are compared to design criteria. Nov 12, 2014 superpave versus marshall method of mix design marshall method, despite its shortcomings, is still probably the most widely used mix design method in the world.
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