“ Asphalt Application: The application of sprayed asphalt coatings not involving the use of aggregates.Īsphalt Binder: Asphalt cement that is classified according to the Standard Specification for Performance Graded Asphalt Binder, AASHTO Designation MP1. Asphalt is a constituent in varying proportions of most crude petroleums.
#ASPHALT TEXTURE SMOOTH SKIN#
Well-graded aggregate is also known as uniformly-graded aggregate.Īir Voids: Empty spaces in a compacted mix surrounded by asphalt-coated particles, expressed as a percentage by volume of the total compacted mix.Īlligator Cracks: Interconnected cracks forming a series of small blocks resembling an alligator’s skin or chicken-wire, and caused by excessive deflection of the surface over unstable subgrade or lower courses of the pavement.Īsphalt (Asphalt Binder or Asphalt Cement): A dark brown to black cementitious material in which the predominating constituents are bitumens which occur in nature or are obtained in petroleum processing.
Open-Graded Aggregate: A gradation containing little or no mineral filler and in which the void space in the compacted aggregate are relatively large, usually 10% or more.Stone Matrix Asphalt (SMA) is a common example of a gap-graded asphalt pavement. Gap-Graded Aggregate: A gradation consisting of larger and finer particles but little or no particles in the middle of the gradation band creating a “gap”.Fine-Graded Aggregate: A gradation having a continuous grading in sizes of particles from coarse through fine with more material smaller than the primary control sieve.Dense-Graded Aggregate: A gradation that has a particle size distribution such that when it is compacted, the resulting voids between the aggregate particles, expressed as a percentage of the total space occupied by the material, are relatively small.Coarse-Graded Aggregate: A gradation having a continuous grading in sizes of particles from coarse through fine with more material larger than the primary control sieve.
The most common mineral fillers include pulverized limestone, other stone dust, hydrated lime, Portland cement, fly ash, and certain natural deposits of finely divided mineral matter.Īggregate Gradation: The particle size distribution from the largest through finest materials. 30) sieve and at least 70 percent of which will pass a 0. Mineral Filler: A finely divided mineral product with a maximum of 3 percent retained on the 0.Fine Aggregate: Aggregate particles passing the 2.Coarse Aggregate: Aggregate particles retained on the 2.The test method utilizes a partial vacuum to induce flow in the viscometer.Īggregate Spreaders: Machines used for spreading aggregate evenly at a uniform rate on a surface.Īggregate Storage Bins: Bins that store the necessary aggregate sizes and feed them to the dryer in substantially the same proportions as are required in the finished mix.Īggregate Trucks: Trucks equipped with hydraulic lifts to dump the aggregate into the spreader or storage area.Īggregate: A hard inert material of mineral composition such as sand, gravel, slag, or crushed stone, used in pavement applications either by itself or for mixing with asphalt binder. ** Transportation Research Board Definitions AĪbsolute Viscosity: A measure of the viscosity of asphalt with respect to time, measured in poises, conducted at 60☌ (140☏). This is an alphabetical listing of the terms and descriptions commonly used in the asphalt industry.
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