See all 5 formats and editions hide other formats and editions. 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 mix design manual for new construction and overlays ronald j. First, design compaction levels are established and materials are selected and characterized.
Trbs national cooperative highway research program nchrp report 567. Performance by design transportation research board. Superpave mix design tests methods and requirements by john a. Harrigan strategic highway research program ronald j. See the recommended thickness design software section below for current and robust alternatives to sw1. The superpave mix designs shall be according to the requirements specified in tables 1, 2, 4, 5, and 9. Superpave volumetric mix design originally termed superpave level 1 is an improved material. 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. Aggregate sizes of the mix design should be checked prior to use in thinner lifts. Asphalt institute, 1996, superpave mix design, superpave series no. The superpave mix design method was designed to replace the hveem and marshall methods. This text will explain the method of compacting samples of the superpave mix using the superpave gyratory compactor and determining their percent compaction. The superpave mix design manual for new construction and. The jmf for superpave mixes shall be according to the requirements specified in tables 2, 4, and 5.
Kennedy university of texas at austin michael anderson the asphalt institute strategic highway research program national research council washington, dc 1994. 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. The design of asphalt mixtures evolved with its increasing use. Before production of asphaltic concrete, the contractor shall submit, in. 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. To address the issue of gyratory compaction levels, the fhwa mix etg recommends.
Superpave is a system which is inclusive of all these parts. 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. Superpave mix for each there is a compactoin level mix size. It is a multifaceted system with a tiered approach to designing asphalt mixtures based on desired performance. Payment adjustments will apply to hma placed under this specification unless the hma is deemed exempt in accordance with section 344. 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. The superpave regional centers are a unique source of expertise and assistance for highway agencies in their quest to build better, longer lasting roads. Superpave consists of 1 an asphalt binder specification, 2 an hma mix design method and 3 hma tests and performance prediction models.
Superpave overview nthe final product of the shrp asphalt. Binder etg aashto mp1 nthe superpave low temp binder spec has been revised using a new scheme to determine the critical thermal cracking temperature. The system includes an asphalt binder specification, a hotmix asphalt hma design and analysis system, and computer software that integrates the system components. Mar 20, 20 the objective of this module is to walk through each of the steps associated with the development of a superpave mix design. After 2005 there will be no id mix designs approved or available for liquid fuels funds expenditures. Full details of the superpave asphalt binder specification and tests are. An essential companion to this manual is the superpave mix design system manual of specifications, test methods and practices. When shrp was completed in 1993 it introduced these three developments and. Pdf comparative evaluation for mix design of marshall and. Superpave includes a new mixture design and analysis system based on performance characteristics of the pavement.
The product of the shrp asphalt research program thomas w. Cominsky university of texas at austin with contributions by. Full details of the superpave asphalt binder specification. Superpave mixture design provides for a functional selection, blending, and volumetric analysis of proposed materials, along with an evaluation of moisture sensitivity. In different sections of the state it may also be referred to as bituminous concrete,hot plant mix,asphalt concrete, blacktop or superpave. The volumetric analysis common to the hveem and marshall methods provides the basis for the superpave mix design method. Nchrp report 465 simple performance test for superpave mix. Superpave serving the needs of liquid asphalt manufacturers and suppliers. 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. This manual gives detailed consideration to the superpave mix design procedures. Nov 20, 2016 no matter which mix design procedure is used that the requirements for the resultant hot mix asphalt remain the same. Average daily traffic adt greater than 15,000 recommended minimum lift thickness 2 9. Regarding mix design software, many state dots have their own required software to be. There is no plan to update either software package.
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 book superpave mix design manual sp2 pdf kindle is very good and also much like today. Superpave includes a new mixture design and analysis system based on performance characteristics of. Superpave in 1998, the mainedot changed its method of designing hot mix for maine roads. The only acceptable asphalt mix designs will be 50 gyrations superpave mixtures 1. The superpave mix design system evaluates the volumetric properties of the. The superpave system ties and selection into the mix design process, and considers traffic and climate as well. The superpave mix design system provides flexibility to deal with one, two, or all three of the major distress types which it addresses. Superpave design aggregate structure considering uncertainty. The final product of the shrp asphalt research program is a new system called superpave, which is short for superior performing asphalt pavements.
The mix design process should provide an hma mix that will resist permanent deformation, should provide fatigue resistance, durability and resistance to moisture damage. A mix design manual for hot mix asphalt completed june 2010. Roadway inspection and testing of asphalt pavements page no. Volumetric requirements for superpave mix design the. Sheikh edrees, comparison of marshall and superpave asphalt design methods for sudan pavement mix es, international journal of scientific and technical advancements. One of the principal results from the strategic highway research program shrp was the superpave mix design method. The sma mix designs shall be according to the requirements specified in tables 1, 3, 6, 7, and 8.
It is the product of the strategic highway research program. Pdf the quality of asphalt concrete in flexible pavements plays a major role in the. The superpave mix design manual for new construction and overlays. Generally, this results in a paving mix which is coarser, has less sand, and less liquid asphalt. Guidelines for incorporating rap in the superpave system and a manual for use by. The superpave binder specification and mix design system include various test equipment, test methods, and criteria. Identifying innovations for statewide implementation. Design traffic level million esals2 coarse aggregate angularity.
Much of the material contained in this manual was originally produced by the asphalt. 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. Then, mixture samples are prepared and laboratory test results are compared to design criteria. Superpave is an overarching term for the results of the asphalt research portion of the 1987 1993 strategic highway research program shrp. Superpave asphaltic concrete is a contractordesigned mix.
Batch, mix, and compact more samples with this gradation with four asphalt contents. 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. Hot mix asphalt is composed of aggregate bound together. Pdf comparison of marshall and superpave asphalt design. Hot mix asphalt may be referred to by several names. Pdf superpave design aggregate structure considering. 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 analo. Superpave includes some old rules of thumb and some new and mechanistic based features. Superpave mixture design and analysis is performed at one of three increasingly rigorous levels, with each level providing more information about mixture performance. This result proved the superiority of superpave mixes over marshall mixes.
Superpave mix design 48 determining the design asphalt content the selected trial blend becomes the design aggregate structure. Out of these only two are widely used, namely the marshall mix design method and hveem mix design method 5. Comparative evaluation for mix design of marshall and superpave methods. There are many mix design methods that are used throughout the world, e. The change involved a switch from the old hveem design method to the superpave design method. Sp2 by the asphalt institute, lexington, kentucky or aashto standard practice. This method may be used with laboratoryprepared specimens, as in the mix design process, or with plantmixed material during construction. Pg 7622 typically doubles the cost per liquid ton of pg. Adaptation of superpave asphalt concrete mix design procedure.
Materials selection, gradation selection, identification of optimum binder content, and the determination of the moisture sensitivity of the hma at optimum asphalt binder content. Federal highway administration abstract superpave is an acronym for superior performing asphalt pavements. However, the existing superpave design system does not properly address perform. Superpave mix design and gyratory compaction levels fhwa. Superpave gyratory mix design discussion in 1987, the strategic highway research program shrp began developing a new system for specifying asphaltic materials. For rhmagsp, asphalt rubber binder design and profile the jmf must be based on a hma mix design determined as described in the superpave mix design sp2 manual by the asphalt institute.
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