Package deal:: Asphalt Exams Compilation

What is asphalt? - generally a by-product of petroleum distillation; a complex hydrocarbon; soluble in petroleum products; can be naturally-occuring What is tar? - generally a by-product of coal production; resistant to petroleum products How can a source of asphalt be identified? - by solubility...

Asphaltic concrete - A composite material that is prepared in a hot-mix plant and used for construction of highway, parking lot, or airfield pavements capable of supporting high traffic volumes and axle loads. Automatic screed controls - A system that overrides the self-leveling action of the asp...

Asphalt Chemistry - Bituminous material are *hydrocarbons* -very complex chemical composition that depends on the oil source and refining method -*Molecular structure is more important than composition* Asphalt types used in pavements - *Asphalt cement (asphalt binder)* -used for HMA(hot mixed a...

AASHTO R-66 Definition - Liquid asphalt MATERIALs include Asphalt Binder/Asphalt Cement and Asphalt Emulsion AASHTO R-97 Definition - Asphalt MIXTURES include concrete or Hot Mix Asphalt (HMA) Asphalt Binder - -Asphalt cement -High viscosity at ambient temperatures -Upon heating, becomes liquid...

What procedure is used to sample bituminous materials? - GSP 10 What procedure is used to sample hot mix asphalt mixtures from full trucks, roadways, or occasionally partially loaded trucks? - GSP 15 How do you take a HMA sample from a truck? - Shovel off about 60% of the cone and go atleast 6 i...

The three levels of misconduct are... - Neglect, Abuse, Breach of trust Define Neglect - unintentional deviations from testing procedures or specs. Define Abuse - Careless or deliberate deviations from procedures or specs. Define Breach of Trust - Falsification of records or not reporting Imprope...

Hierarchy of construction documents (least to most) - Standard drawings, Standard specs, Supplemental specs, Plans, Special provisions, Special provisions copied notes Which construction documents details approved additions and revisions to the standard spec - Supplemental specs This ensures an ...

Flexible Pavement - surface made with hot mixed asphalt concrete Rigid pavement - surface made with portland cement concrete pavement - is a layering system that provides: -a strong structure to support loads -a smooth wearing surface -a skid resistant wearing surface -a durable under environm...

How are Natural Asphalts formed? - When crude petroleum oils rose to the earths surface and formed pools, The action of the sun and wind drove off the lighter oils and gases, leaving a heavy residue. What are the differences in asphalt and tar? - Asphalt- a dark brown black cementitious material,...

Base Course - Layer or layers of specified material of designated thickness or rate of application based on a subbase or subgrade to support the subsequent layers Bridge - Over a depression; longer than 20' The subgrade is the top _______ of roadbed upon which the pavement structure and shoulder...