One thing i had been wondering prior to purchase was, is there a difference between sp 1 and sp 2. Superpave mix design procedure in accordance with these specifications and in reasonable close conformity with the required lines, grades, thicknesses, and typical. Superpave gyratory compactor sgc 150 mm diameter mold ram pressure. Generally, this results in a paving mix which is coarser, has less sand, and less liquid asphalt.
Superpave is about selecting the proper mix to suit the traffic and climatic conditions. The superpave system ties asphalt binder and aggregate selection into the mix design process, and considers traffic and climate as well. As examples, at the discretion of the agency, designs for warm weather climates can concentrate on permanent deformation only or on permanent deformation and fatigue cracking. 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. Block 14 superpave mix design linkedin slideshare. 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. Gradation of the millings after crushing shall be determined by kt1, kt2, and kt3 dried at 104o f 40o c or less. The volumetric analysis common to the hveem and marshall methods provides the basis for the superpave mix design method. The first article covering the early design practices through the marshall and hveem systems was published in the spring 20 issue of asphalt magazine.
One of the principal results from the strategic highway research program shrp was the superpave mix design method. As traffic levels and loading conditions increase above 1 million 80kn 18,000lb equivalent singleaxle loads esals during a pave. History of asphalt mix design in north america, part 2. Payment adjustments will apply to hma placed under this specification unless the hma is deemed exempt in accordance with section 344. Superpave is an improved system for specifying hotmix asphalt hma component materials, hma mix design and analysis, and pavement performance prediction. Specimens placed in chamber at 25 chma superpave mix design 67 68. This document, intended as a companion to the national asphalt pavement associations. Superpave performance by design final report of the trb superpave committee. The superpave asphalt technology program is currently engaged in several important projects that extend its leadership position in superpave research and implementation.
Green berets ultralight bug out bag with gear recommendations duration. 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. For rhmag sp, asphalt rubber binder design and profile the jmf must be based on a hma mix design determined as described in the superpave mix design sp 2 manual by the asphalt institute. Superpave in 1998, the mainedot changed its method of designing hot mix for maine roads. Superpave mix design procedure for asphalt mixtures aldot.
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. Superpave mix design 48 determining the design asphalt content the selected trial blend becomes the design aggregate structure. This section briefly discusses the superpave mix design method. Pill with imprint sp 200 is blue, elliptical oval and has been identified as vimpat lacosamide 200 mg.
Materials selection binder the design process starts with material selection. Implementation of superpave, when fully developed, should minimize or eliminate rutting, fatigue cracking, and low temperature cracking. A gyratory compactor simulates traffic conditions in the laboratory. Then, mixture samples are prepared and laboratory test results are compared to design criteria. Like the hveem and marshall methods, the superpave method has been proven to produce quality hma from which longlasting pavements can be constructed. The hma mixture will be provided according to the requirements of the standard specifications except where modified herein. Last year, two general aviation airports in kentucky used state funds to overlay their runways with superpave mixtures. The key aspect to the performance of any asphalt mixture is the selection of the optimum materials that will be used in the mixture. Superpave consists of 1 an asphalt binder specification, 2 an hma mix design method and 3 hma.
Heating pills in hot water bathhma superpave mix design 66 67. Ipc global is launching a new education series about superpave or performancebased testing. Wsdot uses the superpave mix design method also commonly called the gyratory mix design method. The superpave mix design manual for new construction and overlays ronald j. The change involved a switch from the old hveem design method to the superpave design method. Its pretty much as i expected its the manual for how to design a pavement using superpave. A superpave mix design includes several processes and decision points. 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. In the superpave mix design and analysis system, the mix. Superpave superpave asphalt mixture design workshop developed by the asphalt team thomas harman 202 4933072 federal highway administration, hrdi11 6300 georgetown pike, mclean, va 22101. M 323 superpave volumetric mix design r 30 mixture conditioning of hotmix asphalt hma r 35 superpave volumetric design for hotmix asphalt hma r 90 sampling of aggregates. The superpave mix design system provides flexibility to deal with one, two, or all three of the major distress types which it addresses. This procedure provides guidelines for volumetric design of densegraded.
An alternative method is to dry, screen, and recombine millings in the laboratory to target gradation. Improving hot mix asphalt performance with superpave. History of design air voids national asphalt pavement. 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. Hdot has built several pavements using the superpave mix design method and plans on doing even more in the future. Hma course superpave mix designhma superpave mix design 1. One of the key components of superpave is materials selection. 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. This is the second of two articles on the history of mix design. The superpave regional centers are a unique source of expertise and assistance for highway agencies in their quest to build better, longer lasting roads. Mix selection superpave uses a volumetric approach to mix design.
This laboratory manual presents the superpave mix design system in a complete. Selection of materials aggregate, binders, modifiers, etc. 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. 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 answer is yes comparing my copy of sp 2 to my friends sp 1, the two books have a lot of overlap, but sp 2 has less detail about asphalt selection. Using superpave mix designs, contractors can produce asphalt mixes to meet specific traffic loads and climates. Superpave performancebased testing for asphalt pavements. This manual complements the standard specifications for construction of roads and bridges on federal highway projects fp. Batch, mix, and compact more samples with this gradation with four asphalt contents. This section briefly discusses the superpave mix design method wapa pavement note on mix design. In this series, you will learn how superpave can help futureproof infrastructures and make a real difference to peoples lives.
Superpave is an overarching term for the results of the asphalt research portion of the 1987 1993 strategic highway research program shrp. Adaptation of superpave asphalt concrete mix design. Superpave gyratory mix design discussion in 1987, the strategic highway research program shrp began developing a new system for specifying asphaltic materials. Superpave asphalt technology center for transportation.
The superpave mix design manual for new construction and. 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. The product of the shrp asphalt research program thomas w. A simple performance test nflow time ne, g selection of materials. Superpave gyratory method washington asphalt pavement. 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. Superpave is a system of components that work together to provide a superior performing asphalt pavement. The final product of the shrp asphalt research program is a new system called superpave, which is short for superior performing asphalt pavements. When a mix contains additives and the source of asphalt cement changes from that used in the mix design, tests shall be redone to verify the dosage of such additives. First, design compaction levels are established and materials are selected and characterized. Superpave mix design was developed as part of the strategic highway research program shrp from 1987 to 1993. The superpave mix design method was designed to replace the hveem and marshall methods. Binder etg aashto mp1 nthe superpave low temp binder spec has been revised using a new scheme to determine the critical thermal cracking temperature.
Evaluation of moisture sensitivity of the design mixture. This manual has been developed to provide construction project personnel with information and guidance for field activities relating to materials. Napa superpave construction guidelines,2 is a guide for the hma. Mpwh specified gradation limits and used gradation. The superpave design process is part of a total pavement design system. Superpave volumetric mix design four major steps in the testing and analysis process. The asphalt binder used in the mixture design shall meet the. Reduced traffic delays, fewer accidents, longer lasting pavements, strong economic development, just to name a few. Kennedy university of texas at austin michael anderson the asphalt institute strategic highway research program national research council washington, dc 1994. Harrigan strategic highway research program ronald j. Cominsky university of texas at austin with contributions by. Significant projects include research on toner modified asphalt, the effect of crushed aggregate percent on performance of hma mixtures, the correlation of field performance to.
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