Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CE materials > Aspahlt exam > Flashcards

Aspahlt exam Flashcards

1
Q

Order in least to greatest moisture (OD, Air dry, Wet, SSD)

A

oven dry, Air dry, SSD, Damp and wet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which moisture states have no external moisture (OD, Air dry, Wet, SSD)

A

SSD, Air dry, Oven dry

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Which moisture states have no internal moisture (OD, Air dry, Wet, SSD)

A

Oven dry

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How to get a volume from only a measurement of two weights

A

Boyant force, it is proportional to the volume displaced in water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the source of asphalt binder for roads

A

Residual from refining crude oil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What does PG 58 -28

A

Performance Grade, Max temp 58 degrees C, min temp -28 degrees C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

If rutting is caused by asphalt binder what caused the problem

A

Max PG needs rasied, Viscosity is too low in high heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What causes thermal cracking from the asphalt binder

A

Min PG needs lowered

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are the four Source properties

A

Tougness, Soundness, Deleterious Materials, Gradation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the test for toughness

A

LA abrasion test, measure resistance to abrasion and impact

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What test is for soundness

A

Grow salt crystals in the aggregate, measures resistance to simulated freeze and thaw

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the test for Deleterious materials

A

Clay lumps and friable particles, Breaks apart soft material and remove from sample (soft particles)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the test for gradation?

A

Sieve analysis, determines particle sizes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the four consensus properties?

A

Coarse aggregate angularity, Flat and elongated, Fine aggregate angularity, clay content

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is coarse aggregate angularity

A

Aggregate needs adequate friction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is flat and elongated

A

an aspect ratio, the aggregate can be easily broken

17
Q

What is Fine aggregate angularity

A

Low angularity sands have stability and surface rutting problems, round fine aggregate aren’t as stable and will compact later

18
Q

What issues does clay content cause?

A

Fine particles have a large surface area, needs more binder

19
Q

Does a lower Fineness modulus need more or less binder

A

It needs more binder

20
Q

What is NMAS, and does a higher NMAS need more or less binder

A

Nominal maximum aggregate size, the bigger the NMAS the less binder needed

21
Q

What is the goal of superpave mix design step one

A

Select materials, aggregate and PG binder

22
Q

What is the goal of superpave mix design step two

A

Select aggregate blend

23
Q

What is the goal of superpave mix design step three

A

Determine aspahlt content (binder). Graph at 4% air voids (Va)

24
Q

What is the goal of superpave mix design step four

A

Moisture sensitivity test

25
Q

How is the agg. blend determined in a batch plant

A

It is weighed in the batch tower

26
Q

How is the agg. blend determined in a Drum mix plant

A

Cold feed bins, heigh of gate and speed of conveyer

27
Q

How is the amount of binder controlled in a batch plant

A

Weighed in the batch tower

28
Q

How is the appriorate amount of binder controlled in a drum mix plant

A

The weigh bridge knows the flow rate of agg. and a computer matches with the needed amount of binder

29
Q

How is the agg. and binder mixed in a batch plant

A

In the pugmill

30
Q

How is agg. and binder mixed in a Drum mix plant

A

In the mixing drum

31
Q

What goes the same direction as airflow in a parallel mixing drum

A

Aggregate and air goes the same direction

32
Q

What type of Drum mixing plant do air and aggregate go in opposite directions

A

Counterflow mixing drum

33
Q

Where is RAP added in a mixing drum

A

After combustion

34
Q
  • List the follow in order of events
    Paving machine
    Vibratory compactor
    Asphalt mix discharge from storage silo
    Material transfer material
    Tack coat
    Mix agg. and asphalt binder
    Smooth steel compactor
    Haul truck
A
  1. Mix agg. and asphalt binder
  2. Asphalt mix discharge from storage silo
  3. Tack coat
  4. Haul truck
  5. Material transfer material
  6. Paving machine
  7. Vibratory compactor
  8. Smooth steel compactor
35
Q

What is the purpose of a material transfer vehicle

A

Keeps HMA warm and ready from haul truck and will unload into paver

36
Q

What are common sources of agg.

A

Gravel, crushed limestone, recycled concrete, and steel slag

37
Q

What does the Sand equivalency test used for

A

To assess the amount of clay particles in a sample

38
Q

Why does ASTM C33 limit the fines

A

An excessive amount of fines can give it a low abrasion resistance

CE materials (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions