Superpave Mix Design – Pavement
The Superpave mix design method consists of 7 basic steps: Aggregate selection. Asphalt binder selection. Sample preparation (including compaction). Performance Tests.
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The Superpave mix design method consists of 7 basic steps: Aggregate selection. Asphalt binder selection. Sample preparation (including compaction). Performance Tests.
In addition, the Superpave software provides the capability to use default design values for the moduli of existing, underlying layers (including asphalt concrete and portland cement
The Superpave ( SuperiorPerformingAsphalt Pavements) systemintroduced a new compactor, the Superpave Gyratory compactor (Figure 1) for densifying mixes in the lab.
Abstract. The traditional Superpave mixture design method selects optimum asphalt binder content to yield 4% air voids content in asphalt mixtures, while
Superpave mix design system integrates material selection (asphalt and aggregates) and mix design into procedures based on project\'s structural section, climate and design
The traditional Superpave mixture design method selects optimum asphalt binder content to yield 4% air voids content in asphalt mixtures, while anticipating
Abstract The traditional Superpave mixture design method selects optimum asphalt binder content to yield 4% air voids content in asphalt mixtures, while anticipating
The Evolution of Asphalt Mix Design Methods. Historians trace the use of asphalt in road construction as far back as 650 BC in Babylonia. The Incan civilization used asphalt as a composite material to pave roads in Peru in the 1500s. The first \"modern\" asphalt pavement in the United States is thought to have been laid in New Jersey in
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. The Superpave Regional Centers are a unique source of expertise and assistance for highway agencies in their quest to build better, longer
Prepare 1000 g of mix, cool at room temp for 24 ± 2 hrs. Bring oil bath to between 325 and 350oF. Obtain a 200 g representative sample of the mix. Fill 2000 mL beaker about halfway with distilled water and heat to boiling. Add mix sample to beaker, maintain boil for 10 m ± 30 s. Remove beaker and skim asphalt from water
The Marshall mix design method can use any suitable method for estimating optimum asphalt content and usually relies on local procedures or experience. Sample Asphalt Binder Contents Based on the results of the optimum asphalt binder content estimate, samples are typically prepared at 0.5 percent by weight of mix increments, with at least
The primary device used in Superpave mix design is the Superpave gyratory compactor (SGC), The SGC is used to produce specimens for volumetric analysis and records data of specimen density throughout the test. Additional Test Equipment Ancillary test equipment required in the preparation of Superpave asphalt mixtures includes:
The Superpave 5 specimens were fabricated using 50 gyrations of a Superpave Gyratory Compactor (SGC) to obtain 5 ± 0.5% air voids content. The control mixture was laboratory-mixed, laboratory-compacted (LMLC) and the test specimens were fabricated to have 7 ± 0.5% air voids content, as is done in conventional asphalt
The asphalt mix design methods have been developed to design asphaltic layers such as the wearing course in flexible pavements. Surface course characteristics like stability, flexibility, durability, and skid resistance are the main considerations in these mix design procedures [].In 1959, Hubbard-Field method was introduced as the first formal
Superpave Volumetric Mix Design. Four major steps in the testing and analysis process : Selection of materials (aggregate, binders, modifiers, etc.) Selection of a design aggregate structure. Selection of a design asphalt binder content. Evaluation of moisture sensitivity of the design
The primary device used in Superpave mix design is the Superpave gyratory compactor (SGC), The SGC is used to produce specimens for volumetric analysis and records data of specimen density throughout the test. Additional Test Equipment Ancillary test equipment required in the preparation of Superpave asphalt mixtures includes:
Manuals. MS-1 Thickness Design-Highways Streets. MS-2 Mix Design Methods for Asphalt Concrete and Other Hot-Mix Types. MS-4 The Asphalt Handbook. MS-17 Asphalt Overlays for Highway and Street Rehabilitation. MS-22 Construction of Hot Mix Asphalt Pavements. MS-22S Principios de Construccion de Pavimentos de Mezcla Asfaltica en
combats the old design method’s weakness of eventual rutting. Additionally, the Hveem and Marshall compaction devices have been replaced by a gyrator compactor, and the compaction effort in mix design is tied to expected traffic. How Superpave works Asphalt pavement has two basic components: 1) aggregates to carry the load, and
The Superpave mix design procedure has been adopted by transportation agencies across the United States for designing dense-graded asphalt mixtures. Many highway agencies have developed customized mix design spreadsheets to use in designing and approving asphalt mix designs. With advancements in computer programming languages, NCAT engineers
Superpave Overview. “Superpave” is an overarching term for the results of the asphalt research portion of the 1987 – 1993 Strategic Highway Research Program (SHRP). Superpave consists of (1) an asphalt binder specification, (2) an HMA mix design method and (3) HMA tests and performance prediction models. Each one of these components is
For example, the Superpave mix design method focuses on designing rutting-resistant mixtures, which led to mixtures that are hard to compact and subjected to low field densities [8], [9], [6], and the Balanced Mix Design method [10], [11] focuses on balancing rutting and cracking performance, while properties of mixtures during construction, e.g.,
The lower mixing temperatures can be achieved by several techniques including (1) using chemical additives to lower the high-temperature viscosity of the asphalt binder, (2) adding water to the binder, causing it to become foamy asphalt or asphalt foam, and (3) using a two-stage process which involves the addition of hard and soft asphalt at
The Moving Ahead for Progress in the 21st Century Act (MAP-21) transportation bill emphasizes performance and new innovations and technologies for the transportation system’s growth and development [1,2,3].The Superpave mix design system was developed under the strategic highway research program (SHRP). However, there has
Asphalt Mix Curing at the Design Lab and at the Field Lab. Making RAP Work In Superpave. Ruggedness Evaluation of AASHTO TP7 and TP9: Phase 1 Indirect Tensile Strength Test (TP9) Ruggedness Evaluation of AASHTO TP7 and TP9: Phase 1 Simple Shear Test at Constant Height (TP7) Superpave Shear Tester Performance – Related Test for Austin Texas
TP 79-12 Determining the Dynamic Modulus and Flow Number Hot Mix Asphalt Using the Asphalt Mixture Performance Tester (AMPT) R 30-02 (2010) Mixture Conditioning Hot Mix Asphalt (HMA) R 35-12 Superpave Volumetric Design for Hot Mix Asphalt (HMA) 2.3 ASTM Standards D6752-11 Standard Test Method for Bulk Specific Gravity and Density
