1–20 von 289 Ergebnissen
|

    Evaluating Particulate Emissions from Jet Engines: Analysis of Chemical and Physical Characteristics and Potential Impacts on Coastal Environments and Human Health

    Boyle, Karleen A. | Transportation Research Record | 1996

      Evaluating Particulate Emissions from Jet Engines: Analysis of Chemical and Physical Characteristics and Potential Impacts on Coastal Environments and Human Health

      Boyle, Karleen A. | Transportation Research Record | 1996
      human health. Little is known about the particulate component of jet engine emissions. Baseline physical and chemical data on JEPs were obtained ...

    Modeling of Oxidative Aging Behavior of Asphalts from Short-Term, High-Temperature Data as a Step toward Prediction of Pavement Aging

    Huh, Jung-Do / Robertson, Raymond E. | Transportation Research Record | 1996

    The oxidative aging data collected during the Strategic Highway Research Program have been analyzed in terms of kinetics of viscosity

     ...

    Differential Scanning Calorimetry Study of Asphalt Crystallinity

    Daly, William H. / Qiu, Zhaoyao / Negulescu, Ioan | Transportation Research Record | 1996
    scanning calorimetry. The crystallization process of asphalt is very time dependent. Slow heating or annealing before analysis to experimentally ...

    Characterization of Granular Systems by Digital Signal Processing of Low Strain Wave Response

    Romero, Salome / Pamukcu, Sibel | Transportation Research Record | 1996
    , ashes, and crumb rubber, are difficult because of chemical and physical inhomogeneity and inconsistency at the time of their production. The ...

    Permeability of Asphalt Surface Seals and Their Effect on Aging of Underlying Asphalt Concrete

    Button, Joe W. | Transportation Research Record | 1996
    of surface seals on the upper 13 mm (½ in.) of an asphalt pavement were estimated. A laboratory aging experiment was devised wherein a ...

    Characterization of Fracture in Asphaltic Mixes Based on a Molecular Approach

    Jacobs, Maarten M. J. / Hopman, Piet C. / Molenaar, André A. A. | Transportation Research Record | 1996
    of processes on the molecular level. Attention is given to the theoretical background of the ART and its application to describing the crack ...

    Using Polyacrylamide Grouts for Permeability Control in Sand

    Khedr, Safwan A. / Ahmed, Mohamed Salah | Transportation Research Record | 1996

    Chemical grouting of permeable soils with highly concentrated low-molecular-weight polymeric solutions greatly reduces the permeability

     ...

    Aggregate Polishing Resistance Pre-Evaluation

    Crouch, L. K. / Shirley, Greg / Head, Gary et al. | Transportation Research Record | 1996
    and chemical or mineralogical methods are only able to identify clearly aggregates with a high probability of performing well. There is little ...

    Performance-Based Testing of Chemical Stabilizers

    Petry, Thomas M. | Transportation Research Record | 1997

    Chemical stabilizing agents have been introduced that have performed in field applications to improve the behavior of earth materials

     ...

    Dust Control: Australasian Experiences with Various Chemical Additives

    Giummarra, George J. / Foley, Graham / Cropley, Stephen | Transportation Research Record | 1997
    of deterioration of the roadway. In October 1996, Australian Road Research Board Transport Research completed and published a study of ...

    Chemical Approach to Formation of Calcite Precipitate from Recycled Concrete Aggregate Base Layers

    Bruinsma, James E. / Peterson, Karl R. / Snyder, Mark B. | Transportation Research Record | 1997
    is explored using chemical thermodynamic techniques. Ion activities and pH levels are estimated for the equilibrium states of rainwater ...

    Chemical Additives for Dust Control: What We Have Used and What We Have Learned

    Bolander, Peter | Transportation Research Record | 1997

    The Pacific Northwest region of the USDA Forest Service has been using chemical additives for dust abatement for many years. The

     ...

    Application of Geotechnical Centrifuge Testing To Evaluate Unconventional Highway Materials

    De, Anirban / Zimmie, Thomas F. | Transportation Research Record | 1997

    The principles involved in using a geotechnical centrifuge to study long-term consolidation and seepage characteristics of an

     ...

    Applicability of Superpave Binder Testing Protocols to Modified Binders

    Bahia, Hussain U. / Perdomo, Dario / Turner, Pamela | Transportation Research Record | 1997

    An effort is made to summarize current practices for modifying paving asphalts. The types and classes of modifiers used, or considered

     ...

    Evaluating Groundwater Pollution Susceptibility of Dust Suppressants and Roadbed Stabilizers: Case Study of a Petroleum-Based Product

    Kimball, Colin E | Transportation Research Record | 1997
    suppressants. Chemical properties of roadbed stabilizers and dust suppressants along with generic soil property parameters can be incorporated into ...

    Characterization of Asphalt Cements Modified with Crumb Rubber from Discarded Tires

    Daly, William H. / Negulescu, Ioan I. | Transportation Research Record | 1997
    of asphalt-rubber blends depend on the concentration of rubber additives, the particle sizes, and the chemical composition of the asphalt ...

    Geotechnical and Environmental Characteristics of Atmospheric Fluidized Bed Combustion Ash and Stoker Ash

    Deschamps, Richard J. | Transportation Research Record | 1997
    . Environmental tests include bulk chemical analysis of major and trace elements, toxicity characteristic leachate procedure, extraction procedure ...

    Relationship Between Particle Size Distribution and Specific Surface Area of Urban Roadway Stormwater Solids

    Sansalone, John J. / Buchberger, Steven G. / Koran, Joseph M. et al. | Transportation Research Record | 1997

    Surface area is a primary factor in determining many physical and chemical properties of solids, especially particles. In urban and

     ...

    Using Suction and Dielectric Measurements as Performance Indicators for Aggregate Base Materials

    Scullion, Tom / Saarenketo, Timo | Transportation Research Record | 1997

    A simple laboratory test for evaluating unstabilized granular base material is introduced. The test consists of monitoring the capillary

     ...

    Earth Materials Catalyst Stabilization for Road Bases, Road Shoulders, Unpaved Roads, and Transportation Earthworks

    Randolph, Robert B. | Transportation Research Record | 1997

    Frequency of use of concentrated liquid stabilizers to improve stability of aggregate and soil materials in constructing roads and other

     ...