![]() ![]() ![]() 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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