Pdf superpave design aggregate structure considering. A manual for design of hotmix asphalt with commentary. This is a technicians manual for use of reclaimed asphalt pavement rap in superpavedesigned hot mix asphalt hma. See the recommended thickness design software section below for current and robust alternatives to sw1. Ndor research project number p556 f restrictedzone. 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. It is a multifaceted system with a tried approach to designing asphalt mixtures based on desired performance.
The key aspect to the performance of any asphalt mixture is the selection of the optimum materials that will be used in the mixture. 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. 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. Evaluation of moisture sensitivity of the design mixture. 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. In phase 2, specimens for apa performance testing are fabricated, and resulting performance data are analyzed. 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. Trbs national cooperative highway research program nchrp report 673. 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. Using the superpave system, materials and mixes can be designed to reliably perform under. Generally, this results in a paving mix which is coarser, has less sand, and less liquid asphalt.
Pdf comparison of marshall and superpave asphalt design. 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. The first article covering the early design practices through the marshall and hveem systems was published in the spring 20 issue of asphalt magazine. 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 mix design was developed as part of the strategic highway research program shrp from 1987 to 1993. Acknowledgments becky mcdaniel, purdue university principal investigator, nchrp 912 research ed harrigan, nchrp senior program officer, nchrp 912 tim murphy, consultant. Average daily traffic adt greater than 15,000 recommended minimum lift thickness 2 9. Engineering judgment and experience must be used to properly utilize the principles and. The volumetric analysis common to the hveem and marshall methods provides the basis for the superpave mix design method. Superpave mix design procedure in accordance with these specifications and in reasonable close conformity with the required lines, grades, thicknesses, and typical. Mix design in hot mix asphalt, binder and aggregate are blended together in precise proportions. Kennedy university of texas at austin michael anderson the asphalt institute strategic highway research program national research council washington, dc 1994. 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 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. First, design compaction levels are established and materials are selected and characterized. 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. This is the second of two articles on the history of mix design. See all 5 formats and editions hide other formats and editions. There is no plan to update either software package. Trbs national cooperative highway research program nchrp report 567. Then, mixture samples are prepared and laboratory test results are compared to design criteria. The primary features of marshall mix design are a densityvoids analysis and the stabilityflow test.
A superpave mix design includes several processes and decision points. Nchrp report 465 simple performance test for superpave. Using rap in the superpave mix design system mike anderson, asphalt institute cupga 2005 victoria, bc november 6, 2005. Mix design procedures and tests shall be in accordance with aashto r 35 except as noted below. Batch, mix, and compact more samples with this gradation with four asphalt contents. One of the key components of superpave is materials selection. Selection of materials aggregate, binders, modifiers, etc. Experimental characterization of rutting performance of hma designed with aggregate gradations according to superpave and marshall methods. Sheikh edrees, comparison of marshall and superpave asphalt design methods for sudan pavement mix es, international journal of scientific and technical advancements.
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. Superpave includes a new mixture design and analysis system based on performance characteristics of the pavement. The compaction devices from the hveem and marshall procedures have been replaced by a. The superpave mix design manual for new construction and. It will be of particular interest to materials engineers in state highway agencies and to contractor personnel responsible. Superpave asphaltic concrete is a contractordesigned mix. 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.
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. Volumetric requirements for superpave mix design the. The relative proportions of these materials determine the physical properties of the hma and ultimately how the hma performs as a finished pavement. However, the existing superpave design system does not properly address perform. Selection of trial blends article pdf available in journal of testing and evaluation 481 january 2020 with 631 reads. History of asphalt mix design in north america, part 2. The change involved a switch from the old hveem design method to the superpave design method. Superpave overview nthe final product of the shrp asphalt program area is superpave. 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. Aggregate sizes of the mix design should be checked prior to use in thinner lifts.
Asphalt institute 2001 superpave mix design series no. The superpave regional centers are a unique source of expertise and assistance for highway agencies in their quest to build better, longer lasting roads. 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. The superpave mix design manual for new construction and overlays ronald j. This documents is available to the public through the national technical information service, springfield, virginia, 22161 19 security classification of this report unclassified. 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. Superpave design aggregate structure considering uncertainty. 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. Superpave mix design 48 determining the design asphalt content the selected trial blend becomes the design aggregate structure. History of design air voids national asphalt pavement.
Cominsky university of texas at austin with contributions by. The product of the shrp asphalt research program thomas w. These volumetric properties are then evaluated to select a mix design or to control the mixture quality during production. Regarding mix design software, many state dots have their own required software to be. Asphalt mixture fatigue, hamburg wheel testing device, mix design, moisture susceptibility, and superpave mix, tack coat 18 distribution statement no restrictions. Based on the volumetric characteristics and apa testing results of each mix, the effects of the rz and faa on. Harrigan strategic highway research program ronald j. Payment adjustments will apply to hma placed under this specification unless the hma is deemed exempt in accordance with section 344. The superpave system ties asphalt binder and aggregate selection into the mix design process, and considers traffic and climate as well. Superpave volumetric mix design four major steps in the testing and analysis process. 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. Refinements to the concepts of asphalt mix design procedures came about not only with. Superpave mix design mh asphalt institute superpave series no.
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