Asphalt Study guides, Class notes & Summaries

ASPHALT BINDER TECHNICIAN CERTIFICATION (NATIONAL ASPHALT INSTITUTE ASPHALT BINDER TECHNICIAN EXAM) 2024!!

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 tests Where was asphalt obtained from originally? - Island of Trinidad and Venezuela; lakes What are petroleum-based asphalts? - a waste product from refinery-processing of crude oil; "bottom of ...

Asphalt is following type of material: A. Elastic B. Viscous C. Viscoelastic D. Plastic - C. Viscoelastic How compaction density of asphalt is monitored during construction? A. Collecting samples and testing in lab B. Using nuclear density gauge C. Using infrared camera D. none of the above - B. Using nuclear density gauge Which asphalt product (emulsion or cutback) is more environmental-friendly? A. Asphalt cement B. Emulsion C. Cutback asphalt D. all of the above - B. Emulsion W...

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 adequate bond between the existing pavement surface and the new asphalt overlay so that slippage and delamination do not occur - Tack coat Which tack coat can be used prior to May and after Septembe...

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 Improperties What is the length of certification? - 3 years Falsification of records can be punishable by.... - 10 years in prison Txdot rep shall... - perform their duties in a lawfully, professionally, ...

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 asphalt paver screed and enables paving to a predetermined grade and slope, using either a rigid or a mobile type reference. Baghouse - Filter system at an asphalt plant to capture fine dust particles...

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 shoulders are constructed - 18" Do not use glass in the top _____ of the embankment - 18" Clear and grub minimum of ____ from each edge of proposed pavement along both lanes and legs of interchange - 30...

A full lot of super pave asphalt is what size? 1,000 tons 1,000 to 2000 tons 2000 to 4000 tons 1 days production - 2000 to 4000 tons Which is not typically used as an asphalt binder in fdot mix designs? PG 52-28 PG 58-22 PG 62-22 PG 76-22(PMA) PG 82-22 (PMA) - PG 62-22 Who cuts the density cores used for verification testing? The verification technician The contractor The independent verification testing technician None of the above - The contractor

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 environmental influence surface surface - -asphalt for concrete surface -prevent water penetration -smooth and well loaded surface -resists the traffic load Base - -distributes the load to the foundation...

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 asphalt) *Asphalt emulsion* -used for cold mix and maintenance applications *Asphalt cutback* -used for cold mix and maintenance applications. Asphalt Cement (binder) - Adheres to most rock -wate...