• Superpave Asphalt Technology Center for Transportation

    The Superpave Asphalt Technology Program is currently engaged in several important projects that extend its leadership position in Superpave research and implementation. 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

  • Evaluation of Superpave Fine Aggregate Angularity

    The validity of the Superpave fine aggregate angularity (FAA) requirement is questioned by both the owner agencies and the paving and aggregate industries. The FAA test is based on the assumption that more fractured faces will result in higher void content in the loosely compacted sample; however, this assumption is not always true.

  • Cited by: 20
  • Effects of Aggregate Gradation and Angularity on VMA and

    The Superpave system adopted the voids in mineral aggregate (VMA) criteria developed by McLeod using the 75-blow Marshall compactor for conventional dense-graded hot mix asphalt (HMA) mixtures. This VMA criteria is a function of only the nominal size of aggregate

  • Cited by: 6 [PDF]
  • Sensitivity of HMA Performance to Texas A&M University

    Therefore, these properties need to be carefully measured and monitored in HMA production. In the current Superpave system, technicians determine coarse aggregate angularity by manually counting the number of fractured faces (ASTM D 5821) (American Society for Testing

  • [PDF]
  • Quantifying the Role of Coarse Aggregate Strength on

    Coarse Aggregate Strength on Resistance to Load in HMA for Blended Aggregates Research Report 0-5268-3 TxDOT Project Number 0-5268 Performed in cooperation with the Texas Department of Transportation & Federal Highway Administration December 2008 Center for Transportation Infrastructure Systems The University of Texas at El Paso

  • [PDF]
  • LABORATORY REPEATABILITY OF THE HAMBURG WHEEL

    gravel aggregate. Limestone is commonly used throughout central Texas and the aggregate used in the HMA for this study was 100% crushed with a Los Angeles (LA) abrasion of 31 and specific gravity approximately 2.57. The gravel aggregate that was used in the HMA for this

  • [PDF]
  • The Superpave Mix Design Manual for New Construction and

    The Superpave Mix Design Manual for New Construction and Overlays Ronald J. Cominsky University of Texas at Austin With contributions by: Gerald A. Huber Heritage Research Group Thomas W. Kennedy University of Texas at Austin Michael Anderson The Asphalt Institute Strategic Highway Research Program National Research Council Washington, DC 1994

  • [PDF]
  • Development and Use of Static Creep Test to Evaluate Rut

    Figure 4.2: Aggregate Gradation for Superpave 12.5 mm Mix in Waco, Texas.24 Figure 4.3: Aggregate Gradation for B-C Mix on IH-35 in Austin.25 Figure 4.4: Aggregate Gradation for B-F Mix on FM 1103 in New Braunfels, Texas .28

  • flat and elongated aggregate from crusher

    count the production aggregate crusher . Jan 22, 2014 Aggregate Production For Superpave HMA The University of Texas An under fed crusher will produce flat and elongated aggregate particles.

  • Gradation Test Pavement Interactive

    Maximum aggregate size can be defined in two different ways: Maximum aggregate size. The smallest sieve through which 100 percent of the aggregate sample particles pass. Superpave mix design defines the maximum aggregate size as “one sieve larger than the nominal maximum size” (Roberts et al., 1996{{1}}). Nominal maximum aggregate size (NMAS).

  • Sensitivity of HMA Performance to Texas A&M University

    Therefore, these properties need to be carefully measured and monitored in HMA production. In the current Superpave system, technicians determine coarse aggregate angularity by manually counting the number of fractured faces (ASTM D 5821) (American Society for Testing

  • The Superpave Mix Design Manual for New Construction and

    The Superpave Mix Design Manual for New Construction and Overlays Ronald J. Cominsky University of Texas at Austin With contributions by: Gerald A. Huber Heritage Research Group Thomas W. Kennedy University of Texas at Austin Michael Anderson The Asphalt Institute Strategic Highway Research Program National Research Council Washington, DC 1994

  • Quantifying the Role of Coarse Aggregate Strength on

    Coarse Aggregate Strength on Resistance to Load in HMA for Blended Aggregates Research Report 0-5268-3 TxDOT Project Number 0-5268 Performed in cooperation with the Texas Department of Transportation & Federal Highway Administration December 2008 Center for Transportation Infrastructure Systems The University of Texas at El Paso

  • VALIDATION OF SUPERPAVE FINE AGGREGATE ANGULARITY

    measurements with the Superpave method of Hot Mix Asphalt (HMA) design. A search of literature and given by Eyad Masad of Texas A&M University, who provided digital scan data of the aggregate materials. The authors would also like to thank the many people who provided 2.5.1 “Aggregate Tests for Hot-Mix Asphalt: State of the Pract

  • VARIABILITY OF AS-CONSTRUCTED PROPERTIES OF HMA

    The largest use of asphalt cement, or bitumen, is in the production of Hot Mix Asphalt (HMA) (Roberts, 1996). There are about 4,000 asphalt mix plants in the United States that produce approximately 500 million tons of asphalt mixture per year. The

  • TexSys: Guide for Selecting HMA for Texas Flexible Pavements

    The University of Texas at El Paso El Paso, Texas 79968 (915) 747-6925 Item 340 is typically used for projects with small quantities of hot mix asphalt (HMA). Item 340 is generally not recommended for projects with more than producers are generally familiar with the production and placement of