Volumetric requirements for superpave mix design the. 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 dmf is defined as the laboratory determination of the precise proportions of asphalt binder, additives and aggregates to be blended together to meet the specified properties for a given asphalt concrete mix. The relative proportions of these materials determine the physical properties of the hma and ultimately how the hma performs as a finished pavement. Acknowledgments becky mcdaniel, purdue university principal investigator, nchrp 912 research ed harrigan, nchrp senior program officer, nchrp 912 tim murphy, consultant. The superpave volumetric mix design procedure aashto mp2 and pp28 developed in the asphalt research program 19871993 of the strategic highway research program shrp does not include a simple, mechanical proof test analogous to the marshall stability and. 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. 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 The compaction devices from the hveem and marshall procedures have been replaced by a. Engineering judgment and experience must be used to properly utilize the principles and. Superpave overview nthe final product of the shrp asphalt program area is superpave. See all 5 formats and editions hide other formats and editions. Before production of asphaltic concrete, the contractor shall submit, in. The superpave mix design manual for new construction and.
Asphalt institute 2001 superpave mix design series no. Superpave mix design 48 determining the design asphalt content the selected trial blend becomes the design aggregate structure. It is a multifaceted system with a tried approach to designing asphalt mixtures based on desired performance. Kennedy university of texas at austin michael anderson the asphalt institute strategic highway research program national research council washington, dc 1994. There is no plan to update either software package. Experimental characterization of rutting performance of hma designed with aggregate gradations according to superpave and marshall methods.
Harrigan strategic highway research program ronald j. Based on the volumetric characteristics and apa testing results of each mix, the effects of the rz and faa on. 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. Generally, this results in a paving mix which is coarser, has less sand, and less liquid asphalt. One of the key components of superpave is materials selection. Design traffic level million esals2 coarse aggregate angularity. Superpave in 1998, the mainedot changed its method of designing hot mix for maine roads. The mix design effort showed that it was difficult to achieve the superpave volumetric requirements of voids in mineral aggregate vma and voids filled with asphalt at 4 percent air voids for a 12. 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. Superpave mix design mh asphalt institute superpave series no.
Superpave design aggregate structure considering uncertainty. Properties considered in mix design superpave mix design. Pdf superpave design aggregate structure considering. 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. In phase 2, specimens for apa performance testing are fabricated, and resulting performance data are analyzed. Regarding mix design software, many state dots have their own required software to be.
A manual for design of hotmix asphalt with commentary. Aggregate sizes of the mix design should be checked prior to use in thinner lifts. Pdf comparison of marshall and superpave asphalt design. The change involved a switch from the old hveem design method to the superpave design method. In gaza strip, marshal mix design procedure astm d 1559 is used for design flexible pavements, but most of the roads are suffering from severe rutting, fatigue and thermal cracking. However, the existing superpave design system does not properly address perform. 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. Then, mixture samples are prepared and laboratory test results are compared to design criteria. Mix design in hot mix asphalt, binder and aggregate are blended together in precise proportions. This is the second of two articles on the history of mix design. See the recommended thickness design software section below for current and robust alternatives to sw1. 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.
Selection of materials aggregate, binders, modifiers, etc. 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. 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. These volumetric properties are then evaluated to select a mix design or to control the mixture quality during production. History of asphalt mix design in north america, part 2. 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. Cominsky university of texas at austin with contributions by. Payment adjustments will apply to hma placed under this specification unless the hma is deemed exempt in accordance with section 344. This documents is available to the public through the national technical information service, springfield, virginia, 22161 19 security classification of this report unclassified. Mix design procedures and tests shall be in accordance with aashto r 35 except as noted below.
Average daily traffic adt greater than 15,000 recommended minimum lift thickness 2 9. Sheikh edrees, comparison of marshall and superpave asphalt design methods for sudan pavement mix es, international journal of scientific and technical advancements. This is a technicians manual for use of reclaimed asphalt pavement rap in superpavedesigned hot mix asphalt hma. Refinements to the concepts of asphalt mix design procedures came about not only with. 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. The superpave mix design manual for new construction and overlays ronald j. Superpave asphaltic concrete is a contractordesigned mix. Evaluation 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. Its amazing this superpave mix design manual sp2 pdf complete, i really do not think the contents of this superpave mix design manual sp2 pdf online is so embedded in my mind and i have always imagined that paradise i can actually read this superpave mix design manual sp2. Using the superpave system, materials and mixes can be designed to reliably perform under. First, design compaction levels are established and materials are selected and characterized.
Trbs national cooperative highway research program nchrp report 567. It will be of particular interest to materials engineers in state highway agencies and to contractor personnel responsible. 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. Superpave volumetric mix design four major steps in the testing and analysis process. Trbs national cooperative highway research program nchrp report 673. Asphalt mixture fatigue, hamburg wheel testing device, mix design, moisture susceptibility, and superpave mix, tack coat 18 distribution statement no restrictions. The key aspect to the performance of any asphalt mixture is the selection of the optimum materials that will be used in the mixture. The product of the shrp asphalt research program thomas w. Superpave mix design was developed as part of the strategic highway research program shrp from 1987 to 1993. 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.
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. The primary features of marshall mix design are a densityvoids analysis and the stabilityflow test. Using rap in the superpave mix design system mike anderson, asphalt institute cupga 2005 victoria, bc november 6, 2005. The contractor shall be required to define properties using a gyratory compactor that has met the superpave evaluation test procedures, during mix design and production. The superpave system ties asphalt binder and aggregate selection into the mix design process, and considers traffic and climate as well. The superpave regional centers are a unique source of expertise and assistance for highway agencies in their quest to build better, longer lasting roads. A superpave mix design includes several processes and decision points. Batch, mix, and compact more samples with this gradation with four asphalt contents. Nchrp report 465 simple performance test for superpave. Materials selection binder the design process starts with material selection.
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