Fault A difference in elevation of two slabs at a joint or crack. Fine Aggregate Aggregate passing the 2.36 mm (No. 8) sieve.

Fine-Graded Aggregate One having a continuous grading in sizes of particles from coarse through fine with a predominance of fine sizes.

Flexibility The ability of an asphalt pavement structure to conform to settlement of the foundation. Generally, flexibility of the asphalt paving mixture is enhanced by high asphalt content. Fog Seal A light application of diluted asphalt emulsion. It is used to renew old asphalt surfaces, seal small cracks and surface voids, and inhibit raveling.

Fractured Slab Techniques Processes used to rehabilitate PCC pavements by eliminating slab action through the reduction of slab size (crack/break and seat) or the pulverization of the PCC slab (rubblization) into essentially a granular base.

Full-Depth Asphalt Pavement The term FULL-DEPTH (registered by the Asphalt Institute with the U.S. Patent Office) certifies that the pavement is one in which asphalt mixtures are employed for all courses above the subgrade or improved subgrade. A Full-Depth asphalt pavement is placed directly on the prepared subgrade.

Grade Depressions Localized low areas of limited size.

Heavy Trucks Two-axle, six-tire trucks or larger. Pickup, panel and light four-tire trucks are not included. Trucks with heavy-duty, wide-base tires are included.

Hot Aggregate Storage Bins Bins that store heated and fractionated aggregates prior to their final proportioning into the mixer.

Hot Mix Asphalt (HMA) High quality, thoroughly controlled hot mixture of asphalt binder (cement) and well-graded, high quality aggregate, which can be compacted into a uniform dense mass.

Hot Mix Asphalt (HMA) Overlay One or more courses of HMA over an existing pavement. I Impermeability The resistance an asphalt pavement has to the passage of air and water into or through the pavement.

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