Term
| Construction uses for bituminous materials (3) |
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Definition
1. roofing
2. sealants
3. pavements |
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Term
| Key characteristics of bituminous materials (5) |
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Definition
1. strong cement
2. durable
3. waterproof
4. adhesive
5. resists most acids, bases, & salts |
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Term
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Definition
-naturally produced
-from petroleum distillation |
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Term
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Definition
| From destructive distillation of bituminous coal |
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Term
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Definition
1. Bermudez (Venezuela)
2. Trinidad Lake (Trinidad)
3. La Brea pits (LA) |
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Term
| Rock asphalt's commercial value is |
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Definition
| low because of its low asphalt content |
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Term
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Definition
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Term
| Petroleum-based asphalt cements are a |
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Definition
| waste product from the refining of crude oil |
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Term
| Distillation levels of crude oil (6) |
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Definition
1. gasoline
2. kerosene
3. light gas oil
4. diesel
5. motor oil
6. asphalt |
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Term
| Room temperature properties of asphalt cement (4) |
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Definition
1. black
2. sticky
3. semi-solid
4. highly viscous |
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Term
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Definition
| cutting with a petroleum solvent |
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Term
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Definition
1. rapid curing (gasoline)
2. medium curing (kerosene)
3. slow curing (low visc. oil) |
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Term
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Definition
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Term
| Anionic emulsion works well with |
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Definition
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Term
| Cationic emulsion works well with |
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Definition
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Term
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Definition
| charge is neutral due to contact with aggregate |
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Term
| Asphalt testing is needed to (3) |
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Definition
1. determine engineering properties
2. characterize desirable properties
3. base payment around |
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Term
| The penetration test (ASTM D5) determines relative |
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Definition
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Term
| Penetration grades range from |
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Definition
| 40 to 300 (stiff to soft) |
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Term
| The flash point test is used for |
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Definition
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Term
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Definition
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Term
| Thin film oven aging (TFO) simulates aging due to (3) |
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Definition
1. mixing
2. storage
3. construction |
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Term
| Penetration specification (ASTM D946) adds 4 requirements |
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Definition
1. flash point
2. ductility
3. solubility
4. TFO aging |
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Term
| As penetration increases (2) |
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Definition
-flash point increases
-retained penetration decreases |
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Term
| Penetration grading advantages (5) |
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Definition
1. near service temp
2. fast
3. in field
4. low cost
5. temp susceptible |
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Term
| Penetration grading disadvantages (4) |
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Definition
1. empirical
2. varies if stiff or soft
3. cannot get mix and compact temps
4. similar penetrations at same temp for different cements |
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Term
| Viscosity grading advantages (5) |
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Definition
1. measures fundamental property
2. covers wide temp range
3. controlled temp, aging limits, & method
4.lots of equipment available
5. get mix & compact temps |
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Term
| Viscosity grading disadvantages (5) |
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Definition
1. expensive
2. limited test time
3. tech skill required
4. only Newtonian materials
5. wide property ranges for same grade |
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Term
| Aged residue (AR) testing advantages (3) |
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Definition
1. reps AC props after mixing
2. measures fundamental props
3. wide temp range |
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Term
| Aged residue testing disadvantages (3) |
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Definition
1. no widespread experience
2. different equipment required
3. long test time |
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Term
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Definition
1. fundamental props
2. environment
3. various temps
4. aging |
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Term
| Mass and Volume terms Pxy x: b, s, a |
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Definition
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Term
| Mass and Volume terms Pxy y: e, a |
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Definition
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Term
| Specific Gravity terms Gxy x: b, s, m |
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Definition
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Term
| Specific Gravity terms Gxy y: b, e, a, m |
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Definition
b-bulk
e-effective
a-apparent
m-max |
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Term
| Air voids are related to (2) |
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Definition
1. rut resistance
2. durability |
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Term
| Unless otherwise stated, Gb is approximated as |
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Definition
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Term
| State the relationship between Gse, Gsb, and Gsa. |
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Definition
Gsb < Gse < Gsa
bulk < effective < apparent |
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Term
| State what some states use instead of Gsb to calculate VMA. |
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Definition
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Term
| VMA indicates film thickness on |
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Definition
| the surface of the aggregate |
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Term
| VFA is the % of VMA that is |
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Definition
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Term
| Pba is the % of absorbed asphalt by |
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Definition
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Term
| Pbe is total asphalt content minus |
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Definition
| percent lost to absorption |
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Term
| Factors influencing HMA volumetric (3) |
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Definition
1. viscosity
2. temperature
3. time |
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Term
| Factors influencing volumetric calculations (4) |
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Definition
1. Gse
2. Pb.
3. Gmax
4. air voids |
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Term
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Definition
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Term
| Batch plants usually have |
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Definition
| better control of final product |
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Term
| Drum mix plants usually have |
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Definition
| much higher production rates |
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Term
| Batch mix plants handle mix changes |
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Definition
| better than drum mix plants |
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Term
| An end dump truck loads material |
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Definition
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Term
| A bottom or belly places material |
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Definition
| in a windrow in front of the paver |
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Term
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Definition
| a conveyor to move material into the hopper |
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Term
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Definition
| push the dump truck while it unloads |
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Term
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Definition
| hold mats before paver placement |
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Term
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Definition
| move mats from hopper through control gates |
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Term
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Definition
| evenly distribute mix over screed |
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Term
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Definition
1. control mat thickness
2. initially compact |
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Term
| The purpose of compaction is to (4) |
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Definition
1. prevent traffic compaction
2. provide rutting resistance
3. make mixture waterproof
4. prevent excessive oxidation |
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Term
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Definition
1. breakdown
2. intermediate
3. finish |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| removes roller marks / blemishes |
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Term
| The primary measure of compaction is |
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Definition
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Term
| Ideal stability and cohesion is at |
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Definition
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Term
| If temperature is too cold when compacting |
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Definition
| compaction cannot be achieved |
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Term
| If temperature is too hot when compacting |
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Definition
| mat will not support rollers |
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Term
| Steel wheel rollers (vibe & static) are used for (2) |
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Definition
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Term
| Pneumatic tire rollers (kneading) operate |
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Definition
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Term
| Vibratory rollers (kneading & static) are good for |
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Definition
| intermediate rolling between steel wheel and pneumatic |
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Term
| Roller patterns should be established on |
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Definition
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Term
| Need consistent density in the |
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Definition
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Term
| Usually have inadequate density at (2) |
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Definition
1. shoulders
2. center line |
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Term
| Rolling TFO (ASTM D2872) is used to |
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Definition
| short-term age asphalt binder |
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Term
| Pressure aging vessel (AASHTO PP1) simulates (2) |
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Definition
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Term
| Dynamic shear rheometer (AASHTO PP TP5) is used to acquire the |
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Definition
| shear modulus (G*) and phase angle, which are related to cracking and rutting |
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Term
| Storage and loss modulus are used to acquire, respectively, the |
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Definition
storage-elasticity (G')
loss-viscosity (G") |
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Term
| The rotational viscometer (ASTM D4402) is used to measure |
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Definition
| asphalt viscosity at various temps |
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Term
| Bending beam rheometer measure creep under |
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Definition
| constant load at low temps |
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Term
| Direct tension tester (AASHTO TP3) measures strain at |
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Definition
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Term
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Definition
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Term
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Definition
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